Long-term stability of surgical-orthodontic open-bite correction

• Published in: American journal of orthodontics and dentofacial orthopedics Vol. 138; no. 3; pp. 254.e1 - 254.e10
• Main Authors: Maia, Francisco Ajalmar, Janson, Guilherme, Barros, Sérgio Estelita, Maia, Nair G, Chiqueto, Kelly, Nakamura, Alexandre Yudi
• Format: Journal Article
• Language: English
• Published: United States Mosby, Inc 01-09-2010
• Subjects: Adolescent; Adult; Bone Plates; Bone Screws; Bone Wires; Cephalometry; Dentistry; Female; Follow-Up Studies; Humans; Longitudinal Studies; Male; Malocclusion, Angle Class I - surgery; Malocclusion, Angle Class I - therapy; Malocclusion, Angle Class II - surgery; Malocclusion, Angle Class II - therapy; Malocclusion, Angle Class III - surgery; Malocclusion, Angle Class III - therapy; Mandible - surgery; Maxilla - surgery; Open Bite - surgery; Open Bite - therapy; Orthodontics, Corrective; Orthognathic Surgical Procedures; Osteotomy - methods; Osteotomy, Le Fort - methods; Palatal Expansion Technique; Recurrence; Retrospective Studies; Serial Extraction; Young Adult
• ISSN: 0889-5406; 1097-6752
• DOI: 10.1016/j.ajodo.2010.03.021

Introduction The objective of this study was to evaluate the long-term stability of open-bite surgical-orthodontic correction. Methods Thirty-nine patients at an initial mean age of 20.83 years were evaluated cephalometrically at pretreatment (T1), immediately after treatment (T2), and at the last recall (T3), with a mean follow-up time of 8.22 years. The surgical protocol included single-jaw or double-jaw surgery. Because the patients had different anteroposterior malocclusions, the sample was divided into a Class I and Class II (I-II) subgroup (3 Class I, 20 Class II malocclusion patients) and a Class III subgroup (16 patients). The dentoskeletal characteristics of the total sample and the subgroups were compared at T1, T2, and T3 with dependent analysis of variance (ANOVA). Results Overbite relapse in the posttreatment period was statistically significant in the whole sample and the Class I-II subgroup. Fourteen patients of the whole sample (35.9%) had clinically significant open-bite relapse (negative overbite). Conclusions There was a statistically significant open-bite relapse in the overall sample and in the Class I-II subgroup. The clinically significant values of long-term open-bite correction stability were 64.11%, 47.82%, and 87.50% in the overall sample, the Class I-II subgroup, and the Class III subgroup, respectively.