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Condylar resorption in orthognathic surgery: a retrospective study
C A De Clercq1, L F Neyt, M Y Mommaerts
1Department of Surgery, Division of Maxillofacial Surgery, Az St-Jan, Brugge, Belgium.
The International Journal of Adult Orthodontics and Orthognathic Surgery
|January 1, 1994
Summary
Female patients with high-angle mandibular deficiency may experience condylar atrophy after bimaxillary osteotomy. This study found 31% of female patients showed significant ramus resorption, necessitating informed consent and radiographic monitoring.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthodontics
- Skeletal Biology
Background:
- Orthognathic surgery, specifically bimaxillary osteotomy, is used to correct complex maxillofacial deformities.
- High-angle mandibular deficiency presents unique challenges in surgical outcomes.
- Condylar atrophy, or resorption, is a potential complication following mandibular surgery.
Purpose of the Study:
- To investigate the incidence and characteristics of condylar atrophy after bimaxillary osteotomy in patients with high-angle mandibular deficiency.
- To identify potential risk factors associated with condylar resorption in this patient cohort.
Main Methods:
- Retrospective analysis of 93 patients who underwent bimaxillary osteotomy between 1987 and 1990.
- Selection of 29 patients diagnosed with high-angle mandibular deficiency.
- Radiographic assessment of ascending ramus length and condylar resorption.
Main Results:
- Condylar resorption exceeding 2 mm (or 6% of ramus length) occurred in 9 out of 29 (31%) patients.
- All 9 patients exhibiting significant resorption were female.
- No correlation was found between resorption and patient age, degree of retrognathism, or preoperative temporomandibular joint dysfunction.
Conclusions:
- Female patients with high-angle retrognathism are at a notable risk for postoperative condylar resorption following bimaxillary osteotomy.
- Informed consent should include discussion of this potential complication.
- Postoperative radiographic monitoring for at least 2 years is recommended for these patients.