The document describes the classification and treatment of Le Fort I fractures. Le Fort I fractures can be linear, unilateral comminuted, or bilateral comminuted. Treatment depends on the classification and includes observation for non-mobile fractures, closed treatment for minor malocclusions, and open reduction internal fixation for more severe fractures. Open reduction involves exposing the fracture, reducing it, and fixing it with plates placed along the vertical buttresses of the maxilla. Bone grafting may be needed for defects. The occlusion is checked after fixation and corrected if needed.
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
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2. The fracture extend from :
1. Lateral margin of anterior nasal aperture
2. Canine fossa
3. Below zygomatic buttress
4. Along the lateral wall of anturm
5. Posteriorly across the pterfgomaxillary
fissure
6. To fracture the lower 1/3 of pterygiod
laminae
3. 1. Lateral margin of anterior nasal
aperture
2. Canine fossa
3. Below zygomatic buttress
4. Along the lateral wall of anturm
5. Posteriorly across the
fissure
6. To fracture the lower 1/3 of
pterygiod laminae
4. Le Fort I – linear fracture
Le Fort I - with unilateral comminution (with or without defect)
Le Fort I – with bilateral comminution (with or without defect)
Le Fort I – edentulous patients
5. Linear fracture
Observation
Closed treatment
Open reduction internal fixation
Unilateral comminution
Closed treatment
Open reduction internal fixation
Bilateral comminution
Open reduction internal fixation
Edentulous patients
Observation
Open reduction internal fixation
observation
Closed
treatment
Open
reduction
internal
fixation
6. Observation indication :
Le Fort I – linear fracture
Le Fort I – edentulous patients
Observation is reserved for non- or
minimally mobile Le Fort I fractures
with unaffected occlusion.
The patient is advised to stay on a soft
diet for several weeks. The maxilla
should become firm at which point the
diet can be advanced to as tolerated.
Observation implies close follow-up.
The majority of Le Fort I fractures in
edentulous patients with atrophic
maxilla are treated by observation and a
soft diet
7. Closed treatment indication
Le Fort I – linear fracture
Le Fort I - with unilateral
comminution
Closed treatment of Le Fort I fractures
with minor malocclusions can be
performed with maxillary
disimpaction and manipulation,
and mandibulomaxillary fixation
(MMF)
Patients with malocclusion unable to
have general anesthesia can be
treated by application of arch bars
and elastic traction.
A closed reduction of the midface
may be part of an emergency
treatment to reduce bleeding.
8. Open reduction internal fixation indication :
Le Fort I – linear fracture
Le Fort I - with unilateral comminution
(with or without defect)
Le Fort I – with bilateral comminution
(with or without defect)
Le Fort I – edentulous patients
9. Principles
Decision on whether to use bone graft
Choice of implant
Reduction
Fixation (without bone graft)
Fixation (with bone graft)
Check of occlusion
10. Reestablish the midfacial vertical buttresses.
Reestablish the premorbid dental occlusion
Class III tendency often occurs in the
postoperative due to?? To overcome??
The goal is to achieve an anatomical correct
repositioning by means of 3-D reconstruction.
Le Fort I fractures with bilateral comminution
display loss of the correct facial height
11. Bone graft is used to fill defects and the buttresses are
restored using two plates.
Indications (bone grafting):
Loss of bone volume and loss of buttressing
Contraindications (bone grafting):
Inability to stabilize bone graft and maxilla
Inability to obtain soft-tissue closure over graft
Advantages (bone grafting):
Support for facial soft tissues
Restoration of bony buttresses
Prevention of loss of facial height
Disadvantages (bone grafting):
Donor site required for bone graft harvesting
12. Principles
A plate that is placed for the fixation of the
fracture at the zygomaticomaxillary buttress
is generally a larger plate because it is the
point that will provide most stability to the Le
Fort I fracture. The highest forces of
mastication would be in this area.
Another plate can also be applied at the
piriform rim.
13. Plate
Miniplate has 1, 1.3 ,1.5 ,2 system.
L,T,Y-plate or straight plate may by used.
Screws
Self-tapping (mostly uesd - pedrilling)
Selfdrilling (nodrilling –more force)
Plate fixed by 2 screw in each
fragment
14. Arch bars
Exposure of the fracture
segments through a
maxillary vestibular
approach
Mobilization the fracture
has to be mobilized to
enable reduction and
fixation.
Reduction instruments
Rowe disimpaction forceps
Bone hooks
Placing the patient into
MMF
Reducing the maxilla
15. linear fracture
Lateral plating
Apply one plate to each
zygomaticomaxillary buttress first.
Medial plating
Fix an additional plate to the nasomaxillary
buttresses bilaterally
Unilateral commiuntion
Apply plates to the linear fracture side
Fix the noncomminuted side by applying
two plates along the vertical buttresses.
Apply plates to the comminuted fracture
side
Fix two plates to the comminuted side
predrilling of comminuted fragments
Reposition the bony fragment using a
forceps
Bilateral comminution
Apply two L-plates to the lateral
buttresses
Fix two plates which have been bent to
conform to the shape of the lateral
buttresses
Apply two plates to the medial
buttresses
Fix two plates to the medial buttresses
16. Unilateral communition
Apply plates to the linear fracture
side
Fix the noncomminuted side by
applying two plates along the vertical
buttresses.
Buttressing of the defect side
The lateral buttress is plated first,
followed by the medial buttresses.
The medial plate is applied
second.
Shaping the bone graft
Bilateral communition
Lateral buttress
The lateral buttresses are plated first,
followed by the medial buttresses.
Insert the bone graft.
Apply the second lateral buttress
plate in the same manner.
Medial buttresses
17. After internal fixation has been
completed, MMF is released
and the occlusion checked.
If an open bite and/or Class III
tendency occurs when
checking the occlusion, one or
both mandibular condyles were
malposed in posterior and/or
inferior direction.
In such cases, it is necessary
to remove the bone plates,
reapply MMF, and passively
reposition the
maxillomandibular complex
again, assuring the condyles
are properly seated. Bone
plates are again applied and
the occlusion verified.