MANDIBULAR CONDYLAR FRACTURES
Animation source: www.wikimedia.org
Presenter – Dr. Harjeet Yadav
PG III, Dept. of OMFS
Moderator – Dr. Ajay Das
Reader, Dept. of OMFS
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 This seminar deals with the etiology, classification, clinical
features, diagnosis, and contemporary management of
mandibular condylar fractures.
 Along with the regular management strategies, treatment
protocols for geriatric and pediatric patients have also been
discussed.
 The indications and contraindications of closed as well as
open reduction and fixation of condylar fractures are
analyzed in detail.
CONTENTS
• The topic of mandibular condylar fracture has generated more discussion and controversy than
any other in the field of maxillofacial trauma.
• Direct or indirect trauma can lead to fracture of the condyle. The degree of displacement of
fractured condyle depends on the direction and magnitude of force.
• In spite of a common occurrence, the management of condylar fractures has been
controversial as there is no established consensus. Traditionally closed reduction has been the
treatment of choice for condylar fractures and have been treated by various forms of
intermaxillary fixation. With the improvement in radiographic imaging and biomaterials used
in the fixation, surgical management has gradually found acceptance as it restores early
function.
INTRODUCTION
Image source: www.researchgate.net
Elliptical
Shape
• Condyle is a knuckle like structure. It is
a strong upward projection from the
postero-superior part of the ramus.
• The condyle has a backward angulation
of 15–33° to the frontal plane and is
elliptical in shape.
• The mesio-lateral width is 15–20 mm
and the antero-posterior width is 8–
10 mm.
• The condyle articulates with the
mandibular fossa in the temporal bone,
as part of the TMJ.
ANATOMY OF CONDYLE
• The main source of arterial supply to the
condyle is inferior alveolar artery. Other
sources include: superficial temporal artery,
posterior tympanic artery, posterior deep
temporal artery and transverse facial artery.
• Venous drainage is by the corresponding
tributaries.
• Nerve supply is from auriculotemporal,
masseteric and deep temporal nerves.
• Lateral pterygoid muscle is attached at the
pterygoid fovea which is helpful in
protrusive and lateral excursive
movements. Image source: www.aofoundation.org
Rounded
Bird-beak
Diamond
Crooked-finger
DIFFERENT SHAPES OF CONDYLAR HEADS ON OPG
Image source: www.banglajo.info
Image source: www.zipfslaw.org
ANATOMIC VARIATIONS AT DIFFERENT AGES
N Parameter Child Adult
1 Cortical bone Thin Thick
2 Condylar neck Broad Thin
3 Articular surface Thin Thick
4 Capsule Highly vascular Less vascular
5 Periosteum Highly active osteogenic phase
Less active in
latent stage
6
Intracapsular fracture &
hemarthrosis.
Very common Rare
7
Remodelling capacity following
trauma
Present Absent
8 Disturbance in growth Likely N.A
Image source: Ellis surgical approaches to the facial skeleton
SURGICALANATOMY
• The bifurcation of Facial nerve
lies 1.5–2 cm away from the
bony external auditory canal.
• The temporal branch of the facial
nerve lies 8–35 mm from the
bony external auditory canal.
• The marginal mandibular branch
of the facial nerve lies 1.2 cm
away from the inferior border.
Complication: Injury to extracranial branches of facial nerve may lead to
paralysis or severe weakness of muscles of facial expression.
Image source: Ellis surgical approaches to the facial skeleton
The Maxillary artery can be injured during procedures in the subcondylar portion
of the mandible. The mean distance of the branching point of the maxillary artery
to the tip of the condyle is 22.4 mm.
Maxillary artery
Maxillary artery: anatomical landmarks and relationship with the mandibular subcondyle, Hakan Orbay et al, PMID: 18090748 Image source: www.researchgate.net
Complication: Injury to the maxillary artery may lead to profuse bleeding.
The Auriculotemporal nerve passes posterior to the neck of the condyle. The
average vertical distance between the superior condyle and the auriculotemporal nerve
is 7.06 mm
Auriculotemporal nerve
The distribution of the auriculotemporal nerve around the temporomandibular joint, B L Schmidt et al, PMID: 9720090 Image source: www.springer.com
Complication: Injury to auriculotemporal nerve may lead to Frey’s syndrome.
Frey’s syndrome
There is a risk of damage to the Transverse facial artery during condylar surgeries. It
is located about 1.9 cm below the condylar process and runs about 1.25 mm lateral to
the head of mandibular condyle.
Transverse facial artery
The transverse facial artery and the mandibular condylar process: An anatomic and radiologic study, P Nicol et al, PMID: 30965155 Image source: www.wesnorman.com
Complication: Injury to the transverse facial artery may lead to impaired blood
supply to the TMJ.
The mean distance between the Middle meningeal artery and the apex of the
condyle is 18.8 mm.
Middle meningeal artery
Proximity of the middle meningeal artery and maxillary artery to the mandibular head and mandibular neck as
revealed by three-dimensional time-of-flight magnetic resonance angiography, Daphne Schönegg, PMID: 34024006 Image source: www.worldofmedicalsaviours.com
Complication: Injury to middle meningeal artery may lead to epidural hematoma.
The mean distance between medial margin of mandibular condyle to Internal carotid artery
is 11.2 mm ±0.6.
Surgical importance of distance from mandibular condyle to carotid canal and foramen spinosum: an anatomical study, November 2019, International Journal of Research in Medical
Sciences 7(12):4733, DOI:10.18203/2320-6012.ijrms20195547
Internal carotid artery
Complication: Injury to internal carotid artery may lead to thrombosis and
neurological deficit.
The Masseteric nerve is about 16 mm superior to the lowest point on the
mandibular notch.
Masseteric nerve
Topographical Landmarks for the Identification of Branches of Mandibular Nerve and Its Surgical Implications: A Cadaveric
Study, Ariyanachi Kaliappan et al, PMID: 34984156 Image source: www.pocketdentistry.com
Complication: Injury to masseteric nerve may lead to weakness in masseter
muscle and sensory deficit to the TMJ.
The location of Superficial temporal artery bifurcation is about 9.5 ± 5.3 mm
anterior to the posterior margin of the condyle.
Superficial temporal artery
The Anatomy of the Superficial Temporal Artery in Adult Koreans Using 3-Dimensional Computed Tomographic
Angiogram: Clinical Research, Byung Soo Kim et al, PMID: 24167792 Image source: www.musculoskeletalkey.com
Complication: Injury to superficial temporal artery may lead to profuse bleeding.
Road traffic accidents 45%
Fall injury 40%
Interpersonal violence 8%
Sports injury 3%
Crushing trauma 2%
Gun shot <1%
Pathological process <1%
ETIOLOGY
INCIDENCE
 About 30% of all mandibular fractures.
 Male predilection – About 80% cases. Image source: www.researchgate.net
28%
BLOW FALL RTA
Kinetic energy imported to the
static individual by a moving
object.
Lindahl (1977) proposed 3 mechanisms of injury to the condyle
MECHANISM OF INJURY
Kinetic energy derived from the
movement of individual and
extended upon a static object.
Kinetic energy which is
summation of forces derived
from a combination of 1. & 2
1 2 3
BONE BIOMECHANICS
Mandible functions as a class III lever system, where the
muscle force is between the TMJ & the occlusal load.
Sources: www.oralmaxsurgeryatlas.theclinics.com
www.springer.com
BIOMECHANICS OF INJURY
(HUNTING BOW CONCEPT)
• The Mandible resembles a Hunting bow
which is weak at the ends and strong in
the midline. Its ends (the condyles) are
enclosed by the glenoid fossa.
• So any blow to the midline (symphysis
region) of the mandible can cause
bilateral condylar fracture and any blow
to the parasymphysis region may cause a
contralateral condylar fracture.
• This is based on the impact of the force.
Condyle
Tension
Rotational movement
permitted
Tension
Condyle
Symphysis
Blow
Image source: www.researchgate.net
T
T T
C C
C
VARIATIONS IN STANDARD FRACTURE PATTERNS
Five general reasons:
 Magnitude oftheimpact
 Direction of the impact
 Position of the mandible
 Condition of the dentition
 Shape of the object delivering the impact
Image source: www.zerodonto.com
Unilateral subcondylar fractures 425 lbs / 193 kgs
Bilateral subcondylar fractures 550 lbs / 220 kgs
Symphyseal fractures 924 lbs / 419 kgs
Lateral impact for body fractures 300 to 700 lbs / 136 to 317 kgs
Biomechanics of cranio-maxillofacial trauma – Biju Pappachan & Mohan Alexander 2012 June PMID 23730074
FORCE REQUIRED TO FRACTURE A MANDIBLE
A. Facial nerve injuries
B. C-spine injuries
C. Displacement of the condyle into the middle cranial fossa
D. Injuries to the external auditory canal
E. Blunt internal carotid artery injury
F. Injury to inferior alveolar nerve
EARLY COMPLICATIONS ASSOCIATED WITH CONDYLAR FRACTURES
A. B. C. D. E. F.
The relationship between the carotid canal and mandibular condyle: an anatomical study with application to surgical
approaches to the skull base via the infratemporal fossa, Fernando Alonso et al, doi:10.2399/ana.16.03
GLENOID FOSSA
CAROTID CANAL
LATE COMPLICATIONS ASSOCIATED WITH CONDYLAR FRACTURES
A. Malocclusion
B. Growth disturbances
C. Temporomandibular joint dysfunction syndrome
D. Ankylosis
E. Condylar resorption
A. B. C. D. E.
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www.mayoclinic.org
www.banglajol.info
COMPLICATION ASSOCIATED WITH CONDYLAR FRACTURES
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CLASSIFICATION OF CONDYLAR FRACTURES
 Unilateral or bilateral condylar fractures
 Wassmund's classification (1934)
 MacLennan’s Clinical classification (1952)
 Rowe and Killey's classification (1968)
 Spiessel and Schroll’s classification (1972)
 Lindahl’s classification (1977)
 Loukota’s classification (2005)
TYPE I
The angle between the head and the long axis of the ramus is 10 to 45
degrees.
TYPE
II
The angle between the head and the long axis of the ramus is 45 to 90
degrees, resulting in tearing of the medial portion of the capsule.
TYPE
III
The fragments are not in contact, and the head is displaced mesially
and forward to traction of lateral pterygoid muscle, confined to within
the glenoid fossa.
TYPE
IV
The fractures where the condylar head articulates in an anterior
position to the articular eminence.
TYPE
V
Vertical or oblique fractures through the head of the condyle.
WASSMUND’S CLASSIFICATION (1934)
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TYPE I Non-displaced
TYPE II Deviation
TYPE III Displacement
TYPE IV Dislocation
MACLENNAN’S CLINICAL CLASSIFICATION (1952)
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A. Simple fractures of condyle
B. Compound fractures of condyle
C. Comminuted fracture associated with zygomatic arch fracture.
Type I Non-displaced fracture
Type II
Low neck fracture with
displacement
Type III
High neck fracture with
displacement
Type IV
Low neck fracture with
dislocation
Type V
High neck fracture with
dislocation
Type VI Head fracture
SPIESSELAND SCHROLL’S CLASSIFICATION (1972)
TYPE I TYPE II
TYPE III TYPE IV
TYPE V TYPE VI
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LINDAHL’S CLASSIFICATION (1977)
I. Anatomic location of the fracture:
Condylar head
Condylar neck
Subcondylar
II. Relationship of condylar fragment to mandible:
Non-displaced
Deviated
Displacement with medial or lateral overlap
Displacement with anterior or posterior overlap
III. Relationship of condylar head and fossa:
Non-displaced
Displacement
Dislocation
IV. Injury to meniscus:
It may be torn, ruptured or herniated in forward/backward direction. Image source: www.researchgate.net
LOUKOTA’S CLASSIFICATION
• Diacapitular fracture
• Condylar neck fracture
• Condylar basis fracture
Image source: www.researchgate.net
CLINICAL EXAMINATION
 Condylar fractures are diagnosed with the help of both clinical and radiological
assessment.
 These fractures are most commonly missed on clinical examination.
 Extracapsular condylar fractures are frequent and may be associated with
displacement of the condylar head.
 The condylar head may be in contact with the ramus or may be displaced laterally
or medially.
Unilateral condylar fractures:
• Facial asymmetry.
• Swelling and pain over the TMJ.
• Hemorrhage from the external ear (due to
laceration of external acoustic meatus by the
violent impact of condyle).
• Proper examination with an auriscope is
essential to differentiate bleeding from external
auditory canal and middle ear. Temporal bone
fracture may be accompanied by CSF leak
which is termed as otorrhea.
• Hematoma surrounding the fractured condyle.
• Hematoma in the mastoid region called the
Battle’s sign.
INSPECTION
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Auriscope
• If the condylar head is displaced medially, characteristic hollow in the region of condylar
head can be observed once the edema subsides.
• Ear bleed will persist if the head of the condyle is impacted in the glenoid fossa.
• Deviation of mandible towards the side of fracture.
• Decreased range of movements.
• Gagging of occlusion on the ipsilateral side.
• Locked mandible – due to entry into the middle cranial fossa.
Deviation of mandible and ipsilateral open bite Image source: www.sciencedirect.com
Bilateral condylar fractures:
• Overall mandibular movements are usually
more restricted.
• If the condyle is displaced bilaterally,
shortening of ramus occurs resulting in
derangement of occlusion.
• Overriding of the fractured segments result in
anterior open bite.
• Associated fracture of symphysis or para-
symphysis can also be present; thus careful
examination is mandatory (Contre-coupe
injury).
•Pseudo Class II appearance.
Anterior open bite
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PALPATION
• The condyles are palpated by standing behind the
patient. The little fingers are placed inside the
external auditory canal and the patient is asked to
open and close their mouth. By this method the
position and movement of the condyles are
determined.
• Tenderness over the condylar area with associated
crepitation.
• Displacement of the condylar head within the
external auditory meatus.
• Paresthesia of the lips.
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RADIOGRAPHIC ASSESSMENT
 PA Skull View Or Reverse Towne’s View
 Lateral Oblique View
 Orthopantomography (OPG)
 Computed Tomography (CT Scan)
 Cone Beam Computed Tomography (CBCT)
 Multidetector Computed Tomography (MDCT)
PA Skull View or Reverse Towne’s
View
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Lateral Oblique View
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Orthopantomography (OPG)
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Computed Tomography Scan
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www.researchgate,net
Gold standard for the diagnosis of mandibular condylar fractures.
Coronal section of CT scan showing
a right condylar neck fracture with
medial dislocation of the condyle.
CT scan 3D reconstruction image
of skull showing a right condylar
neck fracture.
Axial section of CT scan showing a
left condylar neck fracture with
lateral dislocation of the condyle.
Cone Beam Computed Tomography
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Coronal section of CBCT scan showing a left
condylar neck fracture with medial dislocation
of the condyle.
 Multidetector Computed Tomograpy (MDCT) provides similar information as CBCT scan, but
additionally allows some visualization of the soft tissues.
 But the patients are exposed to higher radiation doses than CBCT scans.
MANAGEMENT OF CONDYLAR FRACTURES
This is achieved by proper repositioning and immobilization of the fractured fragments.
1. Restoration of form.
2. Obtain stable occlusion.
3. Restore interincisal opening.
4. Establish a full range of mandibular excursive movements.
5. Minimize deviation of the mandible.
6. Produce a pain-free articular apparatus at rest and during function.
7. Avoid internal derangement of the TMJ on the injured and the contralateral side.
8. Avoid the long-term complication of growth disturbances.
GOALS OF THERAPY
FACTORS TAKEN INTO CONSIDERATION FOR TREATMENT
• Location of the fracture.
• Amount of vertical reduction in height of the ramus.
• Degree of angulation.
• Relation of condylar head to the glenoid fossa.
• Fragmentation pattern (simple versus complex).
• Association with other mandibular injuries.
• Dental occlusion/status of dentition.
• Association with other facial bone injuries.
• Association with systemic injuries.
• Association with the condition of the patient (comorbidity factors).
• Foreign body in temporomandibular joint (TMJ).
 Conservative treatment
TREATMENT OPTIONS FOR MANDIBULAR
CONDYLAR FRACTURES
 Surgical treatment
Image source: www.aofoundation.org
CONSERVATIVE TREATMENT
In closed reduction, achievement of good occlusal relationship acts as the guidance
for proper reduction.
The upper and lower jaws are fixed together in occlusal relationship by means of
intermaxillary fixation or maxillomandibular fixation, done using wires or splints.
Various modalities of intermaxillary fixation used commonly for condylar
fracture are:
Wiring:
1. Ivy loop wiring
2. Continuous ivy loop wiring
3. Gilmer wiring
Image source: www.achievers.in
www.springer.com
Arch bars:
1. Erich’s arch bar
2. Bone supported arch bar
3. Custom made arch bar
1. 2.
Image source: www.joms.org
www.omfsfoam.com
Splints:
1. Cap splint in pediatric patients
2. Gunning splints in edentulous patients
Image source: www.jaypeedigital.com
www.ijds.in
1. 2.
1. Minimally displaced fractures (Not more than 30°).
2. Pediatric fractures.
3. Presence of systemic comorbidities which may be an absolute contraindication for surgery.
4.
Condylar head fractures where there is an increased risk of injury to the joint and the
adjoining structures.
5.
Minimal pain complaints and no occlusal discrepancies with acceptable range of
movements.
INDICATIONS FOR CONSERVATIVE TREATMENT
ADVANTAGES DISADVANTAGES
Non-invasive, simple and easy.
Immobilization might not be adequate which
delays healing. Especially in subcondylar
fractures where control over proximal segments
is not established. Unfavorable muscle pull can
cause displacement of fragments.
Does not require exposure to general
anesthesia.
Increases patient morbidity.
Economical. Not safe in epileptic patients.
Less chances of infection. Not tolerated by alcoholic patients.
ADVANTAGES AND DISADVANTAGES OF
CONSERVATIVE TREATMENT
1.
Severe displacement of the condyle.
2.
Mal-united fractures.
3.
Bilateral condylar fractures with severe displacement or dislocation affecting the
occlusion.
4.
Associated fractures of the mandible.
5.
Multi-fragmented fractures of the condylar head.
6. Inability to bring the teeth into occlusion for closed reduction.
INDICATIONS FOR SURGICAL TREATMENT
ABSOLUTE INDICATIONS RELATIVE INDICATIONS
Displacement of condyle into the middle cranial
fossa.
Bilateral condylar fractures in an edentulous
patient when a splint is unavailable or when
splinting is impossible because of alveolar ridge
atrophy.
Impossibility of restoring occlusion.
Unilateral or bilateral condylar fractures when
splinting is not recommended for medical
reasons.
Invasion of foreign body.
Bilateral condylar fractures associated with
comminuted midfacial fractures.
Lateral extracapsular displacement.
Bilateral condylar fractures and associated
gnathologic problems, such as retrognathia or
prognathism.
ZIDE AND KENT’S CRITERIA FOR OPEN REDUCTION
CLOSED REDUCTION OPEN REDUCTION
1. Undisplaced or displaced condylar or
comminuted fracture (in growing children) where
form and function can be restored.
1. Dislocated condyle and mechanical
interferences with the mandibular function.
2. No medical contraindications for MMF.
2. Loss of antero-posterior and vertical dimension
that cannot be managed by closed reduction
(example: panfacial and edentulous fractures).
3. Medical and anaesthetic contraindications for
open reduction.
3. Compound fractures.
4. Displacement of condyle into middle cranial
fossa.
5. Patient or surgeon preference for early or
immediate mobilization of function.
AAOMS 2017 INDICATIONS FOR CLOSED AND OPEN REDUCTION
ADVANTAGES AND DISADVANTAGES OF
SURGICAL TREATMENT
ADVANTAGES DISADVANTAGES
Direct visualization of the fragments for
correct reduction and fixation enabling
proper bone healing.
Potential visible scarring due to skin incisions.
Early mobilization of the mandible ensures
normal joint function and action.
Damage to the nerves, particularly facial nerve.
Restoration of normal oral and jaw activity.
Intra operative bleeding from the maxillary
artery injury.
Loss of blood supply with avascular necrosis of
the condyle.
SURGICALAPPROACHES TO CONDYLAR FRACTURES
1. Preauricular approach and its
modifications
2. Post-auricular approach and its
modifications
3. Endaural approach and its modifications
4. Submandibular approach (Risdon)
5. Retromandibular approach (Hind’s / Post-
ramal / Trans-parotid)
6. Rhytidectomy approach (Face-Lift)
7. Coronal approach
8. Intraoral approach
Image source: www.intechopen.com
APPROACH IS BASED ON THE LEVEL OF FRACTURE
The surgical approach to the condyle for open reduction and fixation is also dictated by the surgeon’s
experience and skill level, the degree of fracture displacement or dislocation, the patient’s desires, and
the complication risk, among other factors.
Image source: Oral and maxillofacial surgery for clinicians – AOMSI
SUBMANDIBULAR APPROACH
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Oral and maxillofacial surgery for clinicians – AOMSI
RETROMANDIBULAR APPROACH
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Oral and maxillofacial surgery for clinicians – AOMSI
Two main variations:
1. Transparotid approach
2. Retroparotid approach
POSTAURICULAR APPROACH
Image source: Ellis Surgical approaches to the facial skeleton
INTRAORAL ENDOSCOPIC APPROACH
Image source: Oral and maxillofacial surgery for clinicians – AOMSI
Image source: Oral and maxillofacial surgery for clinicians – AOMSI
PREAURICULAR APPROACH
Image source: Oral and maxillofacial surgery for clinicians – AOMSI
2. Dissection
Locating temporalis fascia
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1. Skin incision
3. Incising temporalis fascia 4. Dissection of the joint capsule
AL-KAYAT & BRAMLEY
(MODIFIED PRE-AURICULAR APPROACH)
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CORONALAPPROACH
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www.aofoundation.org
Anterior branch of
Superficial temporal
artery
Superficial temporal
artery
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OTHER INCISIONS
DINGMAN BLAIR
AL-KAYAT & BRAMLEY POPWICH ENDAURAL
POSTAURICULAR RHYTIDECTOMY
RETROAURICULAR LIMB OF
RHYTIDECTOMY
THOMA
REDUCTION
• Reduction is the procedure done for restoring
the functional alignment of the fractured bone
fragments.
• Reduction is one of the most difficult steps in
mandibular condylar fracture surgery, and a
key factor governing the postoperative
outcome.
• It is done to bring the fractured fragments
together close to their previous anatomical
position so that healing is proper and rapid.
• Once access is gained to the surgical site,
reduction is done with the help of
repositioning forceps, repositioning pins,
screws, bone clamps, wires or towel clips.
Image source: Oral and maxillofacial surgery for clinicians – AOMSI
METHODS TO REDUCE OF CONDYLAR FRACTURES
ELEVATOR FORCEPS REDUCTION PINS SHARP RETRACTORS
FIXATION
Fixation is the surgical procedure that is done to stabilize and join the ends of
fractured bones by mechanical devices such as metal plates, pins, rods, wires,
or screws.
Wires
Screws
Plates
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IDEAL LINES OF OSTEOSYNTHESIS
Zone of tension: lies along the anterior
border of the condyle and the sigmoid
notch
Zone of compression: lies along the
posterior border of the ramus
Image source: www.sciencedirect.com
TENSION __________________________
COMPRESSION ---------------------------------------
FIXATION USING WIRES
 Perthes and Wassmund first mentioned the use of wires for fixing a TMJ fracture in
1924 and 1927 respectively.
 It provides non-rigid fixation.
 It requires other forms of fixation to maintain stability; like splints and IMF.
 It is low cost.
DIFFERENT FIXATION OPTIONS IN PLATING SYSTEM
Image source: www.joms.com
PLLA – Poly-L-Lactide (Biodegradable plates)
*
*
*
In a single miniplate the fracture must be stabilized using two screws on each side of the
fracture line. The drawback of this plating has showed the greatest peak displacement of
fracture.
SINGLE PLATE
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Application of two plates at the anterior and posterior aspects of the condylar neck helps
in resisting the torsional force that may not be opposed with a single plate.
TWO PLATE
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These includes single L plate, Y plate, triangular plate, trapezoidal plate, and delta plate.
Among all plates geometric plates provide the better stability and outcome, because it
fulfills the criteria of functionally stable osteosynthesis in the fracture segments.
GEOMETRIC PLATE
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Oral and maxillofacial surgery for clinicians – AOMSI
LAMBDA PLATE DELTA PLATE
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DISADVANTAGES OF PLATING SYSTEM
 The whole joint must be opened in most high fractures.
 If the osteosynthesis material is to be removed after the fracture has healed, then a
second operation on the joint region is required.
 The second operation can eventually be more dangerous for the facial nerve
because of the scarring from the first operation.
They prevents the need for re-operation
and has shown good results in the
treatment of condylar fractures. They are
not very stable when compared to titanium
plates in the treatment of condylar
fractures.
RESORBABLE PLATES
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www.bjoms.com
Three-dimensional fixation of fracture
of the mandibular condyle with a
resorbable three-dimensional
osteosynthesis mesh.
Lag screw technique compresses the
fracture fragments together. Good
clinical results can be obtained
especially in diacapitular fractures.
LAG SCREW
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Kirschner wires or K-wires are sharpened, smooth stainless steel pins. Introduced in
1909 by Martin Kirschner, the wires are now widely used in orthopedics They come in
different sizes and are used to hold bone fragments together. The pins are often driven
into the bone through the skin (percutaneous pin fixation) using a power or hand drill.
KIRSCHNER WIRE / K WIRE AND BIORESORBABLE PINS
Image source: Indian Dental Academy
Rasse described an osteosynthesis method for fixing
intracapsular fractures using bioresorbable pins.
K WIRE BIORESORBABLE PINS
The condyle is explanted from the glenotemporal fossa, reduced and fixed in desired
position. The drawback of this type of fixation is that it will lead to avascular necrosis
related to detachment of soft tissue
EXTRA CORPOREAL REDUCTION AND FIXATION
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MANAGEMENT OF PEDIATRIC CONDYLAR FRACTURES
Cap splints for pediatric patients
Conservative-Functional treatment:
 No active fixation but early gentle mobilization if the patient, with or
without assistance, can obtain a normal occlusion.
 Intermaxillary fixation for 10 days, then gentle mobilization and function.
The increased vascularity, combined with thinner
cortical bone, makes the child's condyle more
susceptible to "burst" type fractures, leaving multiple
small highly osteogenic fragments within the joint
space, which may increase the risk for joint ankylosis.
The principle behind the treatment is the repositioning of large tooth-bearing
fragment and mobilization of the mandible at as early a stage as possible in
order to avoid arthrodesis. Bone awl
Current Concepts in the Mandibular Condyle / Fracture Management Part II: Open Reduction Versus Closed Reduction Kang-Young
Choi et al, Department of Plastic and Reconstructive Surgery, Kyungpook National University School of Medicine, Daegu, Korea
MANAGEMENT OF GERIATRIC CONDYLAR FRACTURES
Edentulous patients are treated with a Gunning splint or the
patient's own dentures to recreate the vertical height of the
mandible. If these splints are not firm enough, then circum-
mandibular wiring is used.
Intermediate splint is made
with self cure acrylic resin in
the articulator
A modified maxillary
Gunning splint using the
patient's preexisting dentures
Gunning Splint
Image source: www.researchgate.net
www.jaypeedigital.com
CIRCUM-MANDIBULAR WIRING
Image source: www.jaypeedigital.com
CONCLUSION
The most difficult problem arising after any condylar fracture is the risk of ankylosis.
These complications seldom arise today if the mandible is mobilized early and if the
patient fully cooperates. Long-term active patient co-operation is required for upto 6
months.
Perhaps the collective experience of many surgeons who treat these fractures can best be
characterized as follows:
Intracapsular fractures are best treated closed.
Fractures in children are best treated closed except when the fracture itself anatomically
prohibits jaw function.
Most fractures in adults can be treated closed.
When open reduction is indicated, the procedure must be performed well, with an
appreciation for the patient's occlusal relationships, and it must be supported by an
appropriate physical therapy and follow-up regimen.
REFERENCES
 Oral and maxillofacial trauma – Fonseca, vol.1
 Maxillofacial trauma & Esthetic facial reconstruction – Peterward Booth
 Maxillofacial Injuries – Rowe & Williams, vol 1
 Principles of oral maxillofacial and reconstructive surgery – Peterson’s, vol 1
 Oral and maxillofacial surgery for clinicians – AOMSI
Condyle Fractures.pptx

Condyle Fractures.pptx

  • 1.
    MANDIBULAR CONDYLAR FRACTURES Animationsource: www.wikimedia.org Presenter – Dr. Harjeet Yadav PG III, Dept. of OMFS Moderator – Dr. Ajay Das Reader, Dept. of OMFS
  • 2.
    Animation source: www.wikimedia.org This seminar deals with the etiology, classification, clinical features, diagnosis, and contemporary management of mandibular condylar fractures.  Along with the regular management strategies, treatment protocols for geriatric and pediatric patients have also been discussed.  The indications and contraindications of closed as well as open reduction and fixation of condylar fractures are analyzed in detail. CONTENTS
  • 3.
    • The topicof mandibular condylar fracture has generated more discussion and controversy than any other in the field of maxillofacial trauma. • Direct or indirect trauma can lead to fracture of the condyle. The degree of displacement of fractured condyle depends on the direction and magnitude of force. • In spite of a common occurrence, the management of condylar fractures has been controversial as there is no established consensus. Traditionally closed reduction has been the treatment of choice for condylar fractures and have been treated by various forms of intermaxillary fixation. With the improvement in radiographic imaging and biomaterials used in the fixation, surgical management has gradually found acceptance as it restores early function. INTRODUCTION
  • 4.
    Image source: www.researchgate.net Elliptical Shape •Condyle is a knuckle like structure. It is a strong upward projection from the postero-superior part of the ramus. • The condyle has a backward angulation of 15–33° to the frontal plane and is elliptical in shape. • The mesio-lateral width is 15–20 mm and the antero-posterior width is 8– 10 mm. • The condyle articulates with the mandibular fossa in the temporal bone, as part of the TMJ. ANATOMY OF CONDYLE
  • 5.
    • The mainsource of arterial supply to the condyle is inferior alveolar artery. Other sources include: superficial temporal artery, posterior tympanic artery, posterior deep temporal artery and transverse facial artery. • Venous drainage is by the corresponding tributaries. • Nerve supply is from auriculotemporal, masseteric and deep temporal nerves. • Lateral pterygoid muscle is attached at the pterygoid fovea which is helpful in protrusive and lateral excursive movements. Image source: www.aofoundation.org
  • 6.
    Rounded Bird-beak Diamond Crooked-finger DIFFERENT SHAPES OFCONDYLAR HEADS ON OPG Image source: www.banglajo.info
  • 7.
    Image source: www.zipfslaw.org ANATOMICVARIATIONS AT DIFFERENT AGES N Parameter Child Adult 1 Cortical bone Thin Thick 2 Condylar neck Broad Thin 3 Articular surface Thin Thick 4 Capsule Highly vascular Less vascular 5 Periosteum Highly active osteogenic phase Less active in latent stage 6 Intracapsular fracture & hemarthrosis. Very common Rare 7 Remodelling capacity following trauma Present Absent 8 Disturbance in growth Likely N.A
  • 8.
    Image source: Ellissurgical approaches to the facial skeleton SURGICALANATOMY
  • 9.
    • The bifurcationof Facial nerve lies 1.5–2 cm away from the bony external auditory canal. • The temporal branch of the facial nerve lies 8–35 mm from the bony external auditory canal. • The marginal mandibular branch of the facial nerve lies 1.2 cm away from the inferior border. Complication: Injury to extracranial branches of facial nerve may lead to paralysis or severe weakness of muscles of facial expression. Image source: Ellis surgical approaches to the facial skeleton
  • 10.
    The Maxillary arterycan be injured during procedures in the subcondylar portion of the mandible. The mean distance of the branching point of the maxillary artery to the tip of the condyle is 22.4 mm. Maxillary artery Maxillary artery: anatomical landmarks and relationship with the mandibular subcondyle, Hakan Orbay et al, PMID: 18090748 Image source: www.researchgate.net Complication: Injury to the maxillary artery may lead to profuse bleeding.
  • 11.
    The Auriculotemporal nervepasses posterior to the neck of the condyle. The average vertical distance between the superior condyle and the auriculotemporal nerve is 7.06 mm Auriculotemporal nerve The distribution of the auriculotemporal nerve around the temporomandibular joint, B L Schmidt et al, PMID: 9720090 Image source: www.springer.com Complication: Injury to auriculotemporal nerve may lead to Frey’s syndrome. Frey’s syndrome
  • 12.
    There is arisk of damage to the Transverse facial artery during condylar surgeries. It is located about 1.9 cm below the condylar process and runs about 1.25 mm lateral to the head of mandibular condyle. Transverse facial artery The transverse facial artery and the mandibular condylar process: An anatomic and radiologic study, P Nicol et al, PMID: 30965155 Image source: www.wesnorman.com Complication: Injury to the transverse facial artery may lead to impaired blood supply to the TMJ.
  • 13.
    The mean distancebetween the Middle meningeal artery and the apex of the condyle is 18.8 mm. Middle meningeal artery Proximity of the middle meningeal artery and maxillary artery to the mandibular head and mandibular neck as revealed by three-dimensional time-of-flight magnetic resonance angiography, Daphne Schönegg, PMID: 34024006 Image source: www.worldofmedicalsaviours.com Complication: Injury to middle meningeal artery may lead to epidural hematoma.
  • 14.
    The mean distancebetween medial margin of mandibular condyle to Internal carotid artery is 11.2 mm ±0.6. Surgical importance of distance from mandibular condyle to carotid canal and foramen spinosum: an anatomical study, November 2019, International Journal of Research in Medical Sciences 7(12):4733, DOI:10.18203/2320-6012.ijrms20195547 Internal carotid artery Complication: Injury to internal carotid artery may lead to thrombosis and neurological deficit.
  • 15.
    The Masseteric nerveis about 16 mm superior to the lowest point on the mandibular notch. Masseteric nerve Topographical Landmarks for the Identification of Branches of Mandibular Nerve and Its Surgical Implications: A Cadaveric Study, Ariyanachi Kaliappan et al, PMID: 34984156 Image source: www.pocketdentistry.com Complication: Injury to masseteric nerve may lead to weakness in masseter muscle and sensory deficit to the TMJ.
  • 16.
    The location ofSuperficial temporal artery bifurcation is about 9.5 ± 5.3 mm anterior to the posterior margin of the condyle. Superficial temporal artery The Anatomy of the Superficial Temporal Artery in Adult Koreans Using 3-Dimensional Computed Tomographic Angiogram: Clinical Research, Byung Soo Kim et al, PMID: 24167792 Image source: www.musculoskeletalkey.com Complication: Injury to superficial temporal artery may lead to profuse bleeding.
  • 17.
    Road traffic accidents45% Fall injury 40% Interpersonal violence 8% Sports injury 3% Crushing trauma 2% Gun shot <1% Pathological process <1% ETIOLOGY
  • 18.
    INCIDENCE  About 30%of all mandibular fractures.  Male predilection – About 80% cases. Image source: www.researchgate.net 28%
  • 19.
    BLOW FALL RTA Kineticenergy imported to the static individual by a moving object. Lindahl (1977) proposed 3 mechanisms of injury to the condyle MECHANISM OF INJURY Kinetic energy derived from the movement of individual and extended upon a static object. Kinetic energy which is summation of forces derived from a combination of 1. & 2 1 2 3
  • 20.
    BONE BIOMECHANICS Mandible functionsas a class III lever system, where the muscle force is between the TMJ & the occlusal load. Sources: www.oralmaxsurgeryatlas.theclinics.com www.springer.com
  • 21.
    BIOMECHANICS OF INJURY (HUNTINGBOW CONCEPT) • The Mandible resembles a Hunting bow which is weak at the ends and strong in the midline. Its ends (the condyles) are enclosed by the glenoid fossa. • So any blow to the midline (symphysis region) of the mandible can cause bilateral condylar fracture and any blow to the parasymphysis region may cause a contralateral condylar fracture. • This is based on the impact of the force. Condyle Tension Rotational movement permitted Tension Condyle Symphysis Blow Image source: www.researchgate.net T T T C C C
  • 22.
    VARIATIONS IN STANDARDFRACTURE PATTERNS Five general reasons:  Magnitude oftheimpact  Direction of the impact  Position of the mandible  Condition of the dentition  Shape of the object delivering the impact Image source: www.zerodonto.com
  • 23.
    Unilateral subcondylar fractures425 lbs / 193 kgs Bilateral subcondylar fractures 550 lbs / 220 kgs Symphyseal fractures 924 lbs / 419 kgs Lateral impact for body fractures 300 to 700 lbs / 136 to 317 kgs Biomechanics of cranio-maxillofacial trauma – Biju Pappachan & Mohan Alexander 2012 June PMID 23730074 FORCE REQUIRED TO FRACTURE A MANDIBLE
  • 24.
    A. Facial nerveinjuries B. C-spine injuries C. Displacement of the condyle into the middle cranial fossa D. Injuries to the external auditory canal E. Blunt internal carotid artery injury F. Injury to inferior alveolar nerve EARLY COMPLICATIONS ASSOCIATED WITH CONDYLAR FRACTURES A. B. C. D. E. F. The relationship between the carotid canal and mandibular condyle: an anatomical study with application to surgical approaches to the skull base via the infratemporal fossa, Fernando Alonso et al, doi:10.2399/ana.16.03 GLENOID FOSSA CAROTID CANAL
  • 25.
    LATE COMPLICATIONS ASSOCIATEDWITH CONDYLAR FRACTURES A. Malocclusion B. Growth disturbances C. Temporomandibular joint dysfunction syndrome D. Ankylosis E. Condylar resorption A. B. C. D. E. Image source: www.zerodonto.com www.mayoclinic.org www.banglajol.info
  • 26.
    COMPLICATION ASSOCIATED WITHCONDYLAR FRACTURES Image source: Oral and maxillofacial surgery for clinicians – AOMSI
  • 27.
    CLASSIFICATION OF CONDYLARFRACTURES  Unilateral or bilateral condylar fractures  Wassmund's classification (1934)  MacLennan’s Clinical classification (1952)  Rowe and Killey's classification (1968)  Spiessel and Schroll’s classification (1972)  Lindahl’s classification (1977)  Loukota’s classification (2005)
  • 28.
    TYPE I The anglebetween the head and the long axis of the ramus is 10 to 45 degrees. TYPE II The angle between the head and the long axis of the ramus is 45 to 90 degrees, resulting in tearing of the medial portion of the capsule. TYPE III The fragments are not in contact, and the head is displaced mesially and forward to traction of lateral pterygoid muscle, confined to within the glenoid fossa. TYPE IV The fractures where the condylar head articulates in an anterior position to the articular eminence. TYPE V Vertical or oblique fractures through the head of the condyle. WASSMUND’S CLASSIFICATION (1934) Image source: www.oralmaxsurgeryatlas.theclinics.com
  • 29.
    TYPE I Non-displaced TYPEII Deviation TYPE III Displacement TYPE IV Dislocation MACLENNAN’S CLINICAL CLASSIFICATION (1952) Image source: www.oralmaxsurgeryatlas.theclinics.com
  • 30.
    A. Simple fracturesof condyle B. Compound fractures of condyle C. Comminuted fracture associated with zygomatic arch fracture.
  • 31.
    Type I Non-displacedfracture Type II Low neck fracture with displacement Type III High neck fracture with displacement Type IV Low neck fracture with dislocation Type V High neck fracture with dislocation Type VI Head fracture SPIESSELAND SCHROLL’S CLASSIFICATION (1972) TYPE I TYPE II TYPE III TYPE IV TYPE V TYPE VI Image source: www.oralmaxsurgeryatlas.theclinics.com
  • 32.
    LINDAHL’S CLASSIFICATION (1977) I.Anatomic location of the fracture: Condylar head Condylar neck Subcondylar II. Relationship of condylar fragment to mandible: Non-displaced Deviated Displacement with medial or lateral overlap Displacement with anterior or posterior overlap III. Relationship of condylar head and fossa: Non-displaced Displacement Dislocation IV. Injury to meniscus: It may be torn, ruptured or herniated in forward/backward direction. Image source: www.researchgate.net
  • 33.
    LOUKOTA’S CLASSIFICATION • Diacapitularfracture • Condylar neck fracture • Condylar basis fracture Image source: www.researchgate.net
  • 34.
    CLINICAL EXAMINATION  Condylarfractures are diagnosed with the help of both clinical and radiological assessment.  These fractures are most commonly missed on clinical examination.  Extracapsular condylar fractures are frequent and may be associated with displacement of the condylar head.  The condylar head may be in contact with the ramus or may be displaced laterally or medially.
  • 35.
    Unilateral condylar fractures: •Facial asymmetry. • Swelling and pain over the TMJ. • Hemorrhage from the external ear (due to laceration of external acoustic meatus by the violent impact of condyle). • Proper examination with an auriscope is essential to differentiate bleeding from external auditory canal and middle ear. Temporal bone fracture may be accompanied by CSF leak which is termed as otorrhea. • Hematoma surrounding the fractured condyle. • Hematoma in the mastoid region called the Battle’s sign. INSPECTION Image source: www.tuyenlab.com www.ihealthblogger.com Auriscope
  • 36.
    • If thecondylar head is displaced medially, characteristic hollow in the region of condylar head can be observed once the edema subsides. • Ear bleed will persist if the head of the condyle is impacted in the glenoid fossa. • Deviation of mandible towards the side of fracture. • Decreased range of movements. • Gagging of occlusion on the ipsilateral side. • Locked mandible – due to entry into the middle cranial fossa. Deviation of mandible and ipsilateral open bite Image source: www.sciencedirect.com
  • 37.
    Bilateral condylar fractures: •Overall mandibular movements are usually more restricted. • If the condyle is displaced bilaterally, shortening of ramus occurs resulting in derangement of occlusion. • Overriding of the fractured segments result in anterior open bite. • Associated fracture of symphysis or para- symphysis can also be present; thus careful examination is mandatory (Contre-coupe injury). •Pseudo Class II appearance. Anterior open bite Image source: www.archwired.com www.semanticscholar.org
  • 38.
    PALPATION • The condylesare palpated by standing behind the patient. The little fingers are placed inside the external auditory canal and the patient is asked to open and close their mouth. By this method the position and movement of the condyles are determined. • Tenderness over the condylar area with associated crepitation. • Displacement of the condylar head within the external auditory meatus. • Paresthesia of the lips. Image source: www.pocketdentistry.com
  • 39.
    RADIOGRAPHIC ASSESSMENT  PASkull View Or Reverse Towne’s View  Lateral Oblique View  Orthopantomography (OPG)  Computed Tomography (CT Scan)  Cone Beam Computed Tomography (CBCT)  Multidetector Computed Tomography (MDCT)
  • 40.
    PA Skull Viewor Reverse Towne’s View Image source: www.radiopaedia.org
  • 41.
    Lateral Oblique View Imagesource: www.sciencephoto.com
  • 42.
  • 43.
    Computed Tomography Scan Imagesource: www.radiopaedia.org www.researchgate,net Gold standard for the diagnosis of mandibular condylar fractures. Coronal section of CT scan showing a right condylar neck fracture with medial dislocation of the condyle. CT scan 3D reconstruction image of skull showing a right condylar neck fracture. Axial section of CT scan showing a left condylar neck fracture with lateral dislocation of the condyle.
  • 44.
    Cone Beam ComputedTomography Image source: www.semanticscholar.org Coronal section of CBCT scan showing a left condylar neck fracture with medial dislocation of the condyle.  Multidetector Computed Tomograpy (MDCT) provides similar information as CBCT scan, but additionally allows some visualization of the soft tissues.  But the patients are exposed to higher radiation doses than CBCT scans.
  • 45.
    MANAGEMENT OF CONDYLARFRACTURES This is achieved by proper repositioning and immobilization of the fractured fragments. 1. Restoration of form. 2. Obtain stable occlusion. 3. Restore interincisal opening. 4. Establish a full range of mandibular excursive movements. 5. Minimize deviation of the mandible. 6. Produce a pain-free articular apparatus at rest and during function. 7. Avoid internal derangement of the TMJ on the injured and the contralateral side. 8. Avoid the long-term complication of growth disturbances. GOALS OF THERAPY
  • 46.
    FACTORS TAKEN INTOCONSIDERATION FOR TREATMENT • Location of the fracture. • Amount of vertical reduction in height of the ramus. • Degree of angulation. • Relation of condylar head to the glenoid fossa. • Fragmentation pattern (simple versus complex). • Association with other mandibular injuries. • Dental occlusion/status of dentition. • Association with other facial bone injuries. • Association with systemic injuries. • Association with the condition of the patient (comorbidity factors). • Foreign body in temporomandibular joint (TMJ).
  • 47.
     Conservative treatment TREATMENTOPTIONS FOR MANDIBULAR CONDYLAR FRACTURES  Surgical treatment Image source: www.aofoundation.org
  • 48.
    CONSERVATIVE TREATMENT In closedreduction, achievement of good occlusal relationship acts as the guidance for proper reduction. The upper and lower jaws are fixed together in occlusal relationship by means of intermaxillary fixation or maxillomandibular fixation, done using wires or splints. Various modalities of intermaxillary fixation used commonly for condylar fracture are: Wiring: 1. Ivy loop wiring 2. Continuous ivy loop wiring 3. Gilmer wiring Image source: www.achievers.in www.springer.com
  • 49.
    Arch bars: 1. Erich’sarch bar 2. Bone supported arch bar 3. Custom made arch bar 1. 2. Image source: www.joms.org www.omfsfoam.com
  • 50.
    Splints: 1. Cap splintin pediatric patients 2. Gunning splints in edentulous patients Image source: www.jaypeedigital.com www.ijds.in 1. 2.
  • 51.
    1. Minimally displacedfractures (Not more than 30°). 2. Pediatric fractures. 3. Presence of systemic comorbidities which may be an absolute contraindication for surgery. 4. Condylar head fractures where there is an increased risk of injury to the joint and the adjoining structures. 5. Minimal pain complaints and no occlusal discrepancies with acceptable range of movements. INDICATIONS FOR CONSERVATIVE TREATMENT
  • 52.
    ADVANTAGES DISADVANTAGES Non-invasive, simpleand easy. Immobilization might not be adequate which delays healing. Especially in subcondylar fractures where control over proximal segments is not established. Unfavorable muscle pull can cause displacement of fragments. Does not require exposure to general anesthesia. Increases patient morbidity. Economical. Not safe in epileptic patients. Less chances of infection. Not tolerated by alcoholic patients. ADVANTAGES AND DISADVANTAGES OF CONSERVATIVE TREATMENT
  • 53.
    1. Severe displacement ofthe condyle. 2. Mal-united fractures. 3. Bilateral condylar fractures with severe displacement or dislocation affecting the occlusion. 4. Associated fractures of the mandible. 5. Multi-fragmented fractures of the condylar head. 6. Inability to bring the teeth into occlusion for closed reduction. INDICATIONS FOR SURGICAL TREATMENT
  • 54.
    ABSOLUTE INDICATIONS RELATIVEINDICATIONS Displacement of condyle into the middle cranial fossa. Bilateral condylar fractures in an edentulous patient when a splint is unavailable or when splinting is impossible because of alveolar ridge atrophy. Impossibility of restoring occlusion. Unilateral or bilateral condylar fractures when splinting is not recommended for medical reasons. Invasion of foreign body. Bilateral condylar fractures associated with comminuted midfacial fractures. Lateral extracapsular displacement. Bilateral condylar fractures and associated gnathologic problems, such as retrognathia or prognathism. ZIDE AND KENT’S CRITERIA FOR OPEN REDUCTION
  • 55.
    CLOSED REDUCTION OPENREDUCTION 1. Undisplaced or displaced condylar or comminuted fracture (in growing children) where form and function can be restored. 1. Dislocated condyle and mechanical interferences with the mandibular function. 2. No medical contraindications for MMF. 2. Loss of antero-posterior and vertical dimension that cannot be managed by closed reduction (example: panfacial and edentulous fractures). 3. Medical and anaesthetic contraindications for open reduction. 3. Compound fractures. 4. Displacement of condyle into middle cranial fossa. 5. Patient or surgeon preference for early or immediate mobilization of function. AAOMS 2017 INDICATIONS FOR CLOSED AND OPEN REDUCTION
  • 56.
    ADVANTAGES AND DISADVANTAGESOF SURGICAL TREATMENT ADVANTAGES DISADVANTAGES Direct visualization of the fragments for correct reduction and fixation enabling proper bone healing. Potential visible scarring due to skin incisions. Early mobilization of the mandible ensures normal joint function and action. Damage to the nerves, particularly facial nerve. Restoration of normal oral and jaw activity. Intra operative bleeding from the maxillary artery injury. Loss of blood supply with avascular necrosis of the condyle.
  • 57.
    SURGICALAPPROACHES TO CONDYLARFRACTURES 1. Preauricular approach and its modifications 2. Post-auricular approach and its modifications 3. Endaural approach and its modifications 4. Submandibular approach (Risdon) 5. Retromandibular approach (Hind’s / Post- ramal / Trans-parotid) 6. Rhytidectomy approach (Face-Lift) 7. Coronal approach 8. Intraoral approach Image source: www.intechopen.com
  • 58.
    APPROACH IS BASEDON THE LEVEL OF FRACTURE The surgical approach to the condyle for open reduction and fixation is also dictated by the surgeon’s experience and skill level, the degree of fracture displacement or dislocation, the patient’s desires, and the complication risk, among other factors. Image source: Oral and maxillofacial surgery for clinicians – AOMSI
  • 59.
    SUBMANDIBULAR APPROACH Image source:www.aofoundation.org Oral and maxillofacial surgery for clinicians – AOMSI
  • 60.
    RETROMANDIBULAR APPROACH Image source:www.pocketdentistry.com Oral and maxillofacial surgery for clinicians – AOMSI Two main variations: 1. Transparotid approach 2. Retroparotid approach
  • 61.
    POSTAURICULAR APPROACH Image source:Ellis Surgical approaches to the facial skeleton
  • 62.
    INTRAORAL ENDOSCOPIC APPROACH Imagesource: Oral and maxillofacial surgery for clinicians – AOMSI
  • 63.
    Image source: Oraland maxillofacial surgery for clinicians – AOMSI
  • 64.
    PREAURICULAR APPROACH Image source:Oral and maxillofacial surgery for clinicians – AOMSI
  • 65.
    2. Dissection Locating temporalisfascia Image source: www.aofoundation.org 1. Skin incision 3. Incising temporalis fascia 4. Dissection of the joint capsule
  • 66.
    AL-KAYAT & BRAMLEY (MODIFIEDPRE-AURICULAR APPROACH) Image source: www.wbidajournal.org www.joms.org
  • 67.
    CORONALAPPROACH Image source: www.njms.in www.aofoundation.org Anteriorbranch of Superficial temporal artery Superficial temporal artery
  • 68.
    Image source: Oraland maxillofacial surgery for clinicians – AOMSI OTHER INCISIONS DINGMAN BLAIR AL-KAYAT & BRAMLEY POPWICH ENDAURAL POSTAURICULAR RHYTIDECTOMY RETROAURICULAR LIMB OF RHYTIDECTOMY THOMA
  • 69.
    REDUCTION • Reduction isthe procedure done for restoring the functional alignment of the fractured bone fragments. • Reduction is one of the most difficult steps in mandibular condylar fracture surgery, and a key factor governing the postoperative outcome. • It is done to bring the fractured fragments together close to their previous anatomical position so that healing is proper and rapid. • Once access is gained to the surgical site, reduction is done with the help of repositioning forceps, repositioning pins, screws, bone clamps, wires or towel clips. Image source: Oral and maxillofacial surgery for clinicians – AOMSI
  • 70.
    METHODS TO REDUCEOF CONDYLAR FRACTURES ELEVATOR FORCEPS REDUCTION PINS SHARP RETRACTORS
  • 71.
    FIXATION Fixation is thesurgical procedure that is done to stabilize and join the ends of fractured bones by mechanical devices such as metal plates, pins, rods, wires, or screws. Wires Screws Plates Image source: www.plasticsurgerykey.com www.ijoms.com
  • 72.
    IDEAL LINES OFOSTEOSYNTHESIS Zone of tension: lies along the anterior border of the condyle and the sigmoid notch Zone of compression: lies along the posterior border of the ramus Image source: www.sciencedirect.com TENSION __________________________ COMPRESSION ---------------------------------------
  • 73.
    FIXATION USING WIRES Perthes and Wassmund first mentioned the use of wires for fixing a TMJ fracture in 1924 and 1927 respectively.  It provides non-rigid fixation.  It requires other forms of fixation to maintain stability; like splints and IMF.  It is low cost.
  • 74.
    DIFFERENT FIXATION OPTIONSIN PLATING SYSTEM Image source: www.joms.com PLLA – Poly-L-Lactide (Biodegradable plates) * * *
  • 75.
    In a singleminiplate the fracture must be stabilized using two screws on each side of the fracture line. The drawback of this plating has showed the greatest peak displacement of fracture. SINGLE PLATE Image source: www.springer.com www.aofoundation.org
  • 76.
    Application of twoplates at the anterior and posterior aspects of the condylar neck helps in resisting the torsional force that may not be opposed with a single plate. TWO PLATE Image source: www.aofoundation.org
  • 77.
    These includes singleL plate, Y plate, triangular plate, trapezoidal plate, and delta plate. Among all plates geometric plates provide the better stability and outcome, because it fulfills the criteria of functionally stable osteosynthesis in the fracture segments. GEOMETRIC PLATE Image source: www.e-asp.org www.joms.org www.orthopaper.com Oral and maxillofacial surgery for clinicians – AOMSI
  • 78.
    LAMBDA PLATE DELTAPLATE Image source: Oral and maxillofacial surgery for clinicians – AOMSI
  • 79.
    DISADVANTAGES OF PLATINGSYSTEM  The whole joint must be opened in most high fractures.  If the osteosynthesis material is to be removed after the fracture has healed, then a second operation on the joint region is required.  The second operation can eventually be more dangerous for the facial nerve because of the scarring from the first operation.
  • 80.
    They prevents theneed for re-operation and has shown good results in the treatment of condylar fractures. They are not very stable when compared to titanium plates in the treatment of condylar fractures. RESORBABLE PLATES Image source: www.oooojournal.net www.bjoms.com Three-dimensional fixation of fracture of the mandibular condyle with a resorbable three-dimensional osteosynthesis mesh.
  • 81.
    Lag screw techniquecompresses the fracture fragments together. Good clinical results can be obtained especially in diacapitular fractures. LAG SCREW Image source: www.oooojournal.net www.aofoundation.org www.pocketdentistry.com
  • 82.
    Kirschner wires orK-wires are sharpened, smooth stainless steel pins. Introduced in 1909 by Martin Kirschner, the wires are now widely used in orthopedics They come in different sizes and are used to hold bone fragments together. The pins are often driven into the bone through the skin (percutaneous pin fixation) using a power or hand drill. KIRSCHNER WIRE / K WIRE AND BIORESORBABLE PINS Image source: Indian Dental Academy Rasse described an osteosynthesis method for fixing intracapsular fractures using bioresorbable pins. K WIRE BIORESORBABLE PINS
  • 83.
    The condyle isexplanted from the glenotemporal fossa, reduced and fixed in desired position. The drawback of this type of fixation is that it will lead to avascular necrosis related to detachment of soft tissue EXTRA CORPOREAL REDUCTION AND FIXATION Image source: www.researchgate.net
  • 84.
    MANAGEMENT OF PEDIATRICCONDYLAR FRACTURES Cap splints for pediatric patients Conservative-Functional treatment:  No active fixation but early gentle mobilization if the patient, with or without assistance, can obtain a normal occlusion.  Intermaxillary fixation for 10 days, then gentle mobilization and function. The increased vascularity, combined with thinner cortical bone, makes the child's condyle more susceptible to "burst" type fractures, leaving multiple small highly osteogenic fragments within the joint space, which may increase the risk for joint ankylosis. The principle behind the treatment is the repositioning of large tooth-bearing fragment and mobilization of the mandible at as early a stage as possible in order to avoid arthrodesis. Bone awl
  • 85.
    Current Concepts inthe Mandibular Condyle / Fracture Management Part II: Open Reduction Versus Closed Reduction Kang-Young Choi et al, Department of Plastic and Reconstructive Surgery, Kyungpook National University School of Medicine, Daegu, Korea
  • 86.
    MANAGEMENT OF GERIATRICCONDYLAR FRACTURES Edentulous patients are treated with a Gunning splint or the patient's own dentures to recreate the vertical height of the mandible. If these splints are not firm enough, then circum- mandibular wiring is used. Intermediate splint is made with self cure acrylic resin in the articulator A modified maxillary Gunning splint using the patient's preexisting dentures Gunning Splint Image source: www.researchgate.net www.jaypeedigital.com
  • 87.
  • 88.
    CONCLUSION The most difficultproblem arising after any condylar fracture is the risk of ankylosis. These complications seldom arise today if the mandible is mobilized early and if the patient fully cooperates. Long-term active patient co-operation is required for upto 6 months. Perhaps the collective experience of many surgeons who treat these fractures can best be characterized as follows: Intracapsular fractures are best treated closed. Fractures in children are best treated closed except when the fracture itself anatomically prohibits jaw function. Most fractures in adults can be treated closed. When open reduction is indicated, the procedure must be performed well, with an appreciation for the patient's occlusal relationships, and it must be supported by an appropriate physical therapy and follow-up regimen.
  • 89.
    REFERENCES  Oral andmaxillofacial trauma – Fonseca, vol.1  Maxillofacial trauma & Esthetic facial reconstruction – Peterward Booth  Maxillofacial Injuries – Rowe & Williams, vol 1  Principles of oral maxillofacial and reconstructive surgery – Peterson’s, vol 1  Oral and maxillofacial surgery for clinicians – AOMSI