2015 The Angle orthodontist

Evaluation of long-term soft tissue changes after bimaxillary orthognathic surgery in Class III patients.

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The Angle orthodontist Vol. 85 (4) : 631-7 • Jul 2015

OBJECTIVE: To assess soft tissues in the short and long term after bimaxillary surgery in Class III patients by comparing the hard tissue changes and results between time periods. MATERIALS AND METHODS: Twenty-six Class III adult patients treated with bimaxillary surgery were included in the study. Cephalometric records were taken before surgery (T1) and 5 months (T2), 1.4 years (T3), 3 years (T4), and 5 years (T5) after surgery. RESULTS: There was no significant relapse in skeletal parameters. Overjet was significantly reduced between T4-T3 time intervals (P < .01). There were significant increases in Sn-HR, ULA-HR, LLA-HR, B-B(wedge) (P < .01), and B(wedge)-HR (P < .05) between T4-T3 time intervals. There was no significant change in the soft tissue parameters between T5-T4 time intervals. CONCLUSION: Soft tissue vertical relapse occurs in skeletally stabile Class III bimaxillary surgery patients in the first 3 years after surgery.

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