EVALUATION OF POST-SURGICAL STABILITY: A COMPARATIVE STUDY OF ONE-JAW VERSUS TWO-JAW ORTHOGNATHIC SURGERY IN SKELETAL CLASS III PATIENTS

Objective:The aim of this study was to compare the post-surgical stability of one-jaw versus two-jaw orthognathic
surgery in patients with skeletal Class III malocclusion, focusing on skeletal relapse, occlusal stability, and functional
outcomes.
Materials and Methods:This retrospective cohort study included 70 patients (35 in the one-jaw surgery group and 35
in the two-jaw surgery group) who underwent orthognathic surgery for skeletal Class III malocclusion. Postoperative
assessments were conducted at 6 and 12 months using cephalometric analysis, occlusal stability measurements, and
patient-reported outcome measures (PROMs) to evaluate skeletal relapse, occlusal changes, and functional recovery.
Results: The two-jaw surgery group demonstrated superior skeletal stability with minimal relapse compared to the onejaw group. Occlusal stability, as measured by overbite and overjet, was also significantly better in the two-jaw group at 12 months. Functional outcomes, including chewing function and speech, were more favorable in the two-jaw group, with significantly higher PROM scores. Patient satisfaction with facial aesthetics was also greater in the two-jaw surgery group.
Conclusion:Two-jaw orthognathic surgery offers superior post-surgical stability and functional outcomes compared to
one-jaw surgery in patients with skeletal Class III malocclusion. These findings suggest that two-jaw surgery is a more
reliable approach for achieving long-term skeletal and occlusal stability. However, both surgical approaches can provide significant improvements in functional recovery and patient satisfaction.