American Board of Orthodontics (ABO) Practice Exam

Bimaxillary surgery offers a significant benefit in terms of long-term stability for class III cases due to the comprehensive approach it provides in addressing occlusal discrepancies. In cases where there is a significant skeletal misalignment, such as class III malocclusion, simply correcting one jaw may not ensure proper occlusion or facial aesthetics. Bimaxillary surgery involves repositioning both the maxilla and mandible, allowing for a more harmonious and balanced occlusion, which can lead to improved stability over time.

When both jaws are operated on, the treatment can correct functional issues and redistribute the forces acting on the teeth and the surrounding structures more effectively. This thorough alignment reduces the risk of relapse, which is particularly important for maintaining the results achieved through orthodontic treatment.

While factors such as cost, simplicity of the procedure, and recovery time are also relevant considerations in surgical treatment options, they do not address the core issue of stability that is crucial for class III cases. Therefore, the benefit of enhanced long-term stability is the most significant advantage provided by bimaxillary surgery compared to single jaw surgery.