Orthognathic Surgery Clinical Trial
Official title:
Accuracy of Maxillary Repositioning During Orthognathic Surgery: a Prospective Observational Descriptive Study in Annecy Genevois Hospital
Orthognathic surgery aims to correct jaw position taking into account esthetic and functional criteria (dental occlusion, lip position, breathing...). These surgeries are planned using clinical, radiological and dental cast data. The result of this planning are occlusal splints. Orthognathic surgery had improved in the last decade with 3 dimensions computerized tomography scan (3D CT-Scan) planning and osteosynthesis implants. However the accuracy of the operative results compared to the planned ones has rarely been measured.
Orthognathic surgery aims to correct jaw position taking into account esthetic and functional
criteria (dental occlusion, lip position, breathing...). These surgeries are planned only
after the end of the growing period and in association with orthodontics. It is necessary to
wait the end of facial growth to expect a stable result especially concerning mandibular. The
age limit seems to be around 15 to 16 years old for retromandibular deformities and around 18
years old for premandibular deformities.
These surgeries are planned using clinical, radiological and dental cast data. Occlusal
splints are made using all these results; these occlusal splints are used during the
orthognathic surgery to maintain bones in the planned position.
Since 1993, a navigation system (Orthopilot™) is used, which allow to track jaw position, in
real time, with an accuracy around one millimeter and one degree, during orthognathic
surgery. This system is routinely used for condyle repositioning after mandibular sagittal
split osteotomies; but it is also useful for maxillary navigation and positioning.
The investigator propose to measure the accuracy of the operative results compared to the
planned ones, using the Orthopilot™ system.
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