Orthognathic Surgery Flashcards
What is the role of the psychologist in orthognathic surgery?
Early recognition of psychological problems
understand real motivation for surgery
post surgical depression
psychological adaptation to new face.
What is the role of the technologist in orthognathic surgery?
Model surgery planning
Provide occlusal wafer to guide surgery
Build 3D skull models
Digital prediction of final occlusion
What is the role of orthodontist in orthognathic surgery?
Early recognition of dento facial deformities
Orthodontic preparation before and after surgery
Follow up of patient
What are the 3 main treatment options for patients with skeletal discrepancies?
Ortho treatment only
Combined ortho and surgical treatment
Surgical treatment only
What are the advantages of having surgery first?
Reduction in treatment duration
Faster ortho tooth movement
Immediate improvement in facial appearances
Cost effective
What are the possible diagnosis for the maxilla?
Prognathic
Retrognathic
Vertical excess
Vertical deficiency
What are the possible diagnosis for the mandible?
Prognathic
Retrognathic
What are the possible diagnosis for the chin?
Progenia/ retrogenia
Vertical deficiency/ excess
What is involved in combined ortho and surgical treatment?
Tooth alignment, eliminate crowding/ spaces/ cross bite
Alteration and coordination of arches
Correction of incisor inclination (decompensation)
Flatten occlusal plane, surgical fixation and post surgical ortho treatment (fine tuning)
What is the purpose of pre surgical ortho?
To align to arch
To coordinate the arch
To descompensate the arch
What effect does pre surgical ortho have on the orthognathic surgery?
Influences the magnitude of movements which can be achieved at the time of surgery as the occlusion can be used as a surgical template
What is incisor decompensation?
Incisors are either proclined or retroclined so that incisors are at the correct axial inclination to maxillary/ mandibular skeletal bases.
What surgical techniques are used in the maxilla?
Le fort 1 osteotomy - superior, inferior and forward movements
Anterior maxillary osteotomy - posterior movement
What is involved in a le fort 1 osteotomy?
Dis articulate maxilla from base of skull and fix to pre planned position with plates and screws
Cannot move backwards as posterior structures (eg pterygoid plates) are in the way
What surgical techniques are used in the mandible?
Advancement (sagital split osteotomy, inverted L ramus osteotomy)
Set back (sagital split osteotomy, VSSO)
