2. 1. Introduction
2. Anatomy of mandible
3. Etiology
4. Location
5. Classification of mandibular fracture
6. Diagnosis
7. Management
3. Most prominent jaw bone in the lower third of the
face
Fracture occur more frequently when compared to
other bones
For the management , proper anatomy and
attachment of muscle of this jaw
4. Largest , strongest bone in face
Horse shoe or parabola shape
Angle of curvature is 110 -140
Inferior border of the mandible is made of dense cortical
bone only no medullary
Cortical bone is thickest at lower border
Gradually thins down as it goes posterioly .
Composed of symphysis region which is the region where
the two sides of developing mandible fuse during formation
Horizontal aspect –body
Vertical aspect –rami
At end two process – coronoid and condylar aspect
5. 1. Muscles of mastication
2. Muscles on lingual side of mandible
Geniohyoid
Genioglossus
Mylohyoid
Anterior belly of digastric
6. Nerve supply of the
mandible
• Inferior alveolar vessels
• Periosteal attachment
Blood supply
• Inferior alveolar nerve
7. External violence
1. Vehicle accidents
2. Industrial accidents
3. Assaults
4. Gunshots
Sports trauma
1. Contact sports such as boxing
2. Fall froma height
3. Sports
Due to pathologies in the mandible
Due to surgical procedures in the mandible
8. Body region(29%)
Condyle (26%)
Symphysis (17%)
Ramus (4%)
Coronoid process
fracture (1%)
9. Kruger s classification;
• Simple(closed)- linear fracture lines which not communicate with the
exterior
• Compound(open)-the fracture is communicating intraoral or extra
orally
• Comminuted -shattering of bone into multiple pieces
• Complex -complicated they is adjunct injury to the adjacent nerve or
major blood vessels, joints
• Impacted – one fragment is firmly driven within the other fragment
and clinical movement not appreciated
• Greenstick -only one cortex broken ,common in children
• Pathological – spontaneous fracture as a result of normal muscle
contraction or trauma due to increased weakness of underlying bone
10.
11. Rowe and Killey s classification
•Fracture not involving the basal bone – are called dento alveolar fracture
•Fracture involving the basal bone of the mandible ,-
•single unilateral
•double unilateral
•Bilateral
•Multiple
Dingman and Natvig s classification by anatomic region
•Symphysis fracture
•Canine region fracture
•Body of the mandible between canine and angle
•Angle region
•Ramus region
•Coronoid region
•Condylar fracture
•Dentoalveolar region
12. • Direct fracture
• Indirect (counter coupe)fracture
Relation to the
fracture to the site of
injury
• Complete
• Incomplete
Completeness
• Single
• Multiple
• Comminuted
Number of fragments
• Closed/open
• Grades of severity
Involvement of the
integument
• Transverse
• Oblique
• Butterfly
• Oblique surfaced
Shape or area of the
fracture
13. Horizontally
favorable
fracture
• Fracture line runs downwards &forward so upward
displacement avoided
Horizontally
unfavorable
fracture
• Fracture line runs down wards and backwards so upwards
displacement unrestricted
Vertically
favorable
fracture
• Fracture line runs from the outer buccal palate obliquely
backwards and linguallyb, medial, movement restricted
Vertically
unfavorable
fracture
• Fracture line runs from the inner lingual plate obliquelly
medial movement unrestricted
14.
15. Kazanjian V.H.&Converse J.M.
• teeth on both sides of fracture line
• monomaxillary
Class 1
• teeth only on one sides of the fracture line
• intermaxillary fixation
Class 2
• edentulous patient
• open reduction / prosthesis
Class 3
16. • No of fractures or fragments
F
• Location of the fracture
L
• Status of occlusion
O
• Soft tissue involvement
S
• Associated fractures
A
17. Catogorieis
in number
of fracture
Catogories
in location
• F0- incomplete fracture
• F1-single fracture
• F2-multiple fractures
• F3-comminuted fractures
• F4-fractures with bone defect
• L1 ;precanine
• L2; canine
• L3;postcanine
• L4;angle
• L5;supra angular
• L6;condyle
• L7;coronoid
• L8;alveolar process
18. Category
of
occlusion
• O0:no of malocclusion
• O1:malocclusion
• O2:nonexistent occlusion_edentulous mandible
Catogori
es of soft
tissue
involvem
ent
•S0:closed
•S1:open intraorally
•S2:open extra orally
•S3:open intra and extraorally
•S4:soft tissue defect
Catogori
es of
associate
d
fracture
• A0:none
• A1:fracture or loss of teeth
• A2:nasal bone
• A3:zygoma
• A4:LeFort I
• A5:LeFortII
• A6:LeFortIII
19. Cause
Protective helmet/seatbuilt
Direction of force
Teeth clenched at the time of injury
Flow from broad or sharp object
Medical history
20. On extra oral
inspection
• Contour and
swelling
• Laceration and
soft tissue loss
• Swelling and
ecchymosis
• Flattened
apperance of
lateral aspect of
face
• Mouth opening
reduced
• Deviation
• Change in vertical
height
On extraoral
palapation
• Step deformity
and tenderness
On intra oral
inspection
• Occlusion
changes (open
bite , cross bite)
• Midline shift
• Ecchymosis-
coleman’ s sign
• Bleeding
On intraoral
palpation
• Tooth mobility
• For tenderness
22. PRINCIPLES IN TREATMENT
Pt. physical and general status should be evaluated and
monitored prior to any consideration
Diagnosis and treatment of mandibular fracture should
be approached methodologically
Dental injuries should be evaluated
Reestablishment of occlusion is primary goal
With multiple fracture mandibular fracture should be
trated firtst
Prophylatic antibiotic treatment should be used for
compound fracture
23. Reduction
• Closed
• open
Fixation
• Internal/external
• Direct/indirect
• Non rigid wire
osteosynthhesis
• Semi rigid
monocortical plates,
lag screws
• Rigid DCP
Immobilizati
on
• Short term
• Long term
24. Intermaxillary fixation with osteosynthesis
1. Transosseous wiring
2. Circumferential wiring
3. External in fixation
4. Bone clamps
5. Transfixation with kirschner wires
Intermaxillary fixation
1. Dental arch wires
2. Arch bars
25. Methods of immobilization
Osteosynthesis without intermaxillary fixation
1. Non compression small plates
2. Compression plates
3. Mini plates
4. Lag screws
26. •Simple , low cost, and non invasive treatment procedure
•Presence of teeth provide an accuarate guide for reduction
Closed reduction
•Non displaced favourable fracture
•Grossly comminuted fracture
•Sevrrely atrophic edentulous mandible
•Lack of soft tissue over mandible
•Fracture in childeren with developing teeth bud
•Coronoid process fracture
Indication
•History of siezure
•Comprmised pulmonary function
•Psychatric conditions
•GI disorder
Contraindication
27. 1. Arch bar fixation
2. Bridle wiring
3. Figure of eight wiring
4. Gilmer’s direct interdental wiring
5. Eyelet wiring
6. Essig’s wiring
7. Stout’s continuous loop wiring
8. Risdon s wiring
28. Most common type –Erich’s arch bar
Technique
Prefabricated arch bar with hooks are incoorperated on the outer surface
with flat malleable stainless steel metal strip.
Should be cut accuarately to the length of the dental arch
Each arch bar is fixed to upper and lower jaw
On upper jaw hooks are arranged in upward direction and lower jaw with
downward direction
Adapted to buccal surface according to arch form
Fixed to each tooth by 26 gauge stainless steel wire from mesial surface to
lingual side and buccal to distal
Twisting done in clock wise manner
Advantages
1. Less trauma
2. Replaced easily
3. Flat hook Donot irritate the tissue
29. 2.BRIDLE WIRE
For temporary stabilization of fractured segment
Techniques
Fracture reduced under LA and held in position
Wire looped around teeth either side of fracture
and tightened on buccal side
3.FIGURE OF EIGHT WIRING
Used to stabilize the dentoalveolar fracture
Teeth on either side of fracture are used for this
26 guage prestreched stainless steel wire is used
30. 4.GILMERS DIRECT WIRING
Simple method
Techniques
Prestreched 26 gauge stainless steel wire
Wire passed around single tooth in upper
arch till it is tightened
Similiarly wire passed around corresponding
tooth in lower arch
Teeth are brought in occlusion and twisted
wires are held together tightened
Done in fast immobilization is required
5.RISDON WIRING
Substitute for arch bars
Second premolars on either sides are chosen
for anchorage
31. 6.EYELET WIRING
Make eyelet from prestreched 24 gauge stainless steel wire15 cm
long pieces is twisted around probe and make a loop in centre
and twist half around it
Loose end of the eyelet wire are passed interproximally between
2 stable teeth from buccal side
Ends grasped on the lingual side other end is to mesial side and
one side on to distal side then both ends to buccal sides
Then it passed to the loop of eyelet and then tightened in apical
direction
Advantages
1. Firm and stable
2. If any one break , it can be replaced
32. 7.ESSIG S WIRING
When many teeth adjacent to the fracture line are
not much strong to stabilize the fracture
Luxated teeth should be pushed back into their
sockets and stabilization area choosen should be at
leat 3 teeth away from fracture line
8.STOUT S CONTINOUES LOOP WIRING
Posterior quadrent are used for wiring
A piece of solder wire is dapted to the buccal side in
first quardrent from where wiring is started
34. Indication
1. Unfavorable displaced fracture
2. Panfacial fracture
3. Nonunited fracture
4. Malunited fracture
5. If occlusion is not achieved by closed reduction
Contra indication
1. Medically unfit patient
Advantage
1. Anatomic reduction
2. Fixation in desired position
3. Return of function eralier
4. No airway compramise
Disadvanatges
1. Surgical procedure
2. Complication of sugery
35.
36. 1. Symhysis , parasymphysis and body regions of the
mandible- intraoral incision in labial mucosa
- extraoral incision
37. Plates andscrew osteosynthesis are used
Popularised by AO/ASIF
Variuos types are
1. Dynamic compression plates
2. Eccentric dynamic compression plates
3. Self compression plates
Advanatges
1. No MMF
2. Airway safty
3. Return of jaw function faster
4. Patient nutrition is not compramised
Disadvanatages
1. Require surgical skill and training
2. Fixation plates are bulky
3. Stress shielding effect
38. DYNAMIC COMPRESSION PLATE(DCP)
It xreates a compression on both side of fracture line
Unique design –whole on the plates
Two types 1–compression hole
2-static or passive hole
compression hole-Widest diameter hole placed near
fracture line and screw inserted in narrow part of the
hole
Both the screw are tightened fracture end gets
compressed against each other
Passive whole round , not create compression between
bone fragment
39. ECCENTRIC DYNAMIC COMPRESSION PLATES(EDCP)
DCP causes the problems of gaping of the superior
border of mandible EDCP used
Design
Two compression plates on weither side of the
fracture line
Addition obliquely placed two compression holes
two passive holes are present
40.
41. Champy introduced , in which material used was able to resist these unfavorable
masticatory forces
Designs of the plates
Miniplates are mono cortical
1mm thick and 6mm wide
They have a standard distance between the holes
Screws are self tapping
Technique of placement
Fracture is exposed and reduced using manual manipulatio n or bone holding
forceps
Bones are held in the position and plates are applied on it
Placed along the osteosynthesis lines
Hole is placed away from the fracture line nad drilled perpendicular to the plates
surface
First screw is inserted and tightened
Next screw is placed near to fracture line
42.
43. Lag screws
By brons and boering
If fracture with bicortical section
Bioresorbable plates
Made up of polydioxanone,polyglycolic acid, polylactic acid
Once a plates are placed , over a period o0f time, the
material gets resorbed as the glycolic acid by citric acid cycle
Eliminated as CO2
Disadvanatges
Foreign body reaction
Inflammatory reaction
Osteolytic changes
Plate may not be rigid to support the fracture
45. If the tooth present in the line of fracture,
Indication for extraction
1. Excessive mobility
2. Fracture of the root
3. Teeth that prevent reduction of fracture must be
moved
Indication for preservation
1. Tooth with crown fracture
2. Tooth that appears non –vital time of fracture
3. Completely impacted teeth should be retained to
provide additional bone for plating