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Articular disc position in association with mandibular setback surgery.

Jung-A Lee¹, Kyoung-In Yun, Chang-Hyun Kim

¹Department of Oral and Maxillofacial Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea.

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics

|December 25, 2007

Summary

Orthognathic surgery for skeletal class III malocclusion did not significantly alter temporomandibular joint disc position. This study evaluated disc changes and temporomandibular disorder symptoms after surgical intervention.

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Area of Science:

Dentistry
Orthodontics
Oral and Maxillofacial Surgery

Background:

Skeletal class III malocclusion presents unique challenges in orthodontic and surgical management.
Temporomandibular joint (TMJ) disorders can be influenced by skeletal discrepancies and surgical interventions.

Purpose of the Study:

To assess the impact of orthognathic surgery on the articular disc position within the temporomandibular joint.
To evaluate changes in temporomandibular disorder symptoms in skeletal class III patients following orthognathic surgery.

Main Methods:

Clinical examination and magnetic resonance imaging (MRI) were used for pre- and postoperative evaluation.
Thirty-six patients with skeletal class III malocclusion underwent evaluation after undergoing mandibular setback surgery (sagittal split ramus osteotomy).

Main Results:

Mandibular setback surgery did not result in a statistically significant change in articular disc position.
A trend towards posterior displacement of the articular disc was observed post-surgery.

Conclusions:

Orthognathic surgery, specifically mandibular setback, appears to have a limited significant effect on the articular disc's position in skeletal class III patients.
Further research may explore long-term TMJ implications and symptom correlation.