Abstract
In 19 subjects rigid fixation of bilateral sagittal split osteotomies was used for mandibular advancement. Five angles and four linear measurements were determined cephalometrically for two time intervals: before surgery to immediately after surgery (T1-T2), and immediately after surgery to six months to one year after surgery (T2-TL). A multiple regression analysis with a backward stepping procedure was used to determine relationships between relapse, as defined by the position of pogonion at T2-TL (PgT2) and B point during this same time interval (BT2). The only significant predictor of PgT2 was PgT1 (P < 0.001) (amount of advancement of pogonion during the time interval T1-T2). When BT2 was examined, both the change in position of B point at T1-T2 (P < 0.001) and the change in anterior facial height at T1-T2 (P < 0.02) were significant predictors of relapse. There were no other predictors of relapse. Advancements of 6 to 7 mm or greater as measured at B or Pg deserve special attention as they were more predisposed to relapse. Methods for preventing relapse are discussed.
Original language | English |
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Pages (from-to) | 703-707 |
Number of pages | 5 |
Journal | Journal of Oral and Maxillofacial Surgery |
Volume | 44 |
Issue number | 9 |
DOIs | |
State | Published - Sep 1986 |
Bibliographical note
Copyright:Copyright 2014 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- Surgery
- Oral Surgery
- Otorhinolaryngology