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The evaluation of jaw function subsequent to bilateral sagittal split osteotomy.
Xue Wen Yang1, Yao Jun Dong, Xing Long
1Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Wuhan University, Wuhan City, China.
Summary
Orthodontic surgery involving mandibular advancement or set-back significantly alters jaw function and temporomandibular joint (TMJ) anatomy. Recovery of jaw function is faster following set-back surgery compared to advancement surgery.
Area of Science:
- Orthodontics and Maxillofacial Surgery
- Dental Research
Background:
- Orthodontic treatment combined with surgical intervention is a common approach for correcting severe skeletal and dental malocclusions.
- Understanding the impact of these procedures on jaw function and temporomandibular joint (TMJ) anatomy is crucial for patient outcomes.
Purpose of the Study:
- To evaluate changes in jaw function and TMJ anatomy after orthodontic treatment with mandibular advancement or set-back surgery.
- To compare the recovery rates of jaw function between mandibular advancement and set-back surgical groups.
Main Methods:
- A sample of 67 patients with combined skeletal and dental malocclusions who underwent orthodontic and surgical treatment.
- Evaluation of occlusal force, masticatory efficiency, TMJ size, occlusal force-skeletal change relationship, and mandibular range of motion at 3 and 6 months post-surgery.
Main Results:
- Post-surgical changes were observed in occlusal force, masticatory function, TMJ positioning, and mandibular movement distance compared to pre-surgical values.
- The mandibular set-back group demonstrated a more rapid recovery of jaw function than the mandibular advancement group.
Conclusions:
- Surgical mandibular advancement and set-back procedures, utilizing sagittal-split osteotomy, have a significant influence on subsequent mandibular function.
- The findings suggest differential functional recovery patterns based on the type of surgical mandibular correction.