Three-year stability of open-bite correction by 1-piece maxillary osteotomy.

Abstract

INTRODUCTION:

The purpose of this retrospective cephalometric study was to evaluate the long-term vertical stability of anterior open-bite correction by 1-piece Le Fort I osteotomy and rigid fixation.

METHODS:

The sample comprised 40 consecutively treated patients from the files of the Department of Orthodontics, University of Oslo, Norway. All subjects had received a 1-piece Le Fort I osteotomy as the only surgical procedure from 1990 through 1998 and were followed for 3 years according to a protocol for data collection. Lateral cephalograms were obtained before surgery and at 5 occasions after surgery.

RESULTS:

The mean open bite before surgery was 2.6 mm; at the 3-year follow-up, 35 patients had a positive overbite, and the remaining 5 patients had an open bite between 0.2 and 0.9 mm. Impaction of the posterior maxilla >or=2 mm relapsed on average by 31%, and inferior repositioning of the anterior maxilla >or=2 mm relapsed by 62%. Maxillary vertical skeletal changes during the postsurgery period were compensated for by orthodontic dentoalveolar adaptation. Most of the skeletal relapse occurred during the first 6 months after surgery and always in the direction opposite to the surgical movement. The relative contribution of mandibular and maxillary changes in anterior open-bite closure was approximately 3:1.

CONCLUSIONS:

Surgical correction of anterior open bite was generally stable over a 3-year period, and skeletal relapse was counteracted by dentoalveolar compensation.

• Authors: Lisen Espeland, Paul A Dowling, Karim A Mobarak, Arild Stenvik
• Journal: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop) Vol. 134 Issue 1 Pg. 60-6 (Jul 2008) ISSN: 1097-6752 [Electronic] United States
• PMID: 18617104 (Publication Type: Journal Article)

Topics

• Adolescent
• Adult
• Alveolar Process (pathology)
• Bone Plates
• Cephalometry
• Chin (pathology)
• Female
• Follow-Up Studies
• Humans
• Incisor (pathology)
• Longitudinal Studies
• Male
• Mandible (pathology)
• Maxilla (pathology, surgery)
• Middle Aged
• Nasal Bone (pathology)
• Open Bite (pathology, surgery)
• Osteotomy, Le Fort (instrumentation, methods)
• Recurrence
• Retrospective Studies
• Treatment Outcome
• Vertical Dimension