Skeletal stability after mandibular setback surgery: comparisons among unsintered hydroxyapatite/poly-L-lactic acid plate, poly-L-lactic acid plate, and titanium plate.

Abstract

PURPOSE:

The purpose of this study is to compare the time-course changes in condylar long-axis and skeletal stability after sagittal split ramus osteotomy (SSRO) with an unsintered hydroxyapatite (u-HA)/poly-L-lactic acid (PLLA) plate, PLLA plate, or titanium plate.

PATIENTS AND METHODS:

Of 60 Japanese patients diagnosed with mandibular prognathism, 20 underwent SSRO with a u-HA/PLLA plate system, 20 underwent SSRO with a PLLA plate system, and 20 underwent SSRO with a conventional titanium plate system. The time-course changes in condylar long-axis and skeletal stability were assessed by use of axial, frontal, and lateral cephalograms.

RESULTS:

Compared with the u-HA/PLLA group, the titanium group showed a significantly greater change in the right condyle angle between initially and 1 month (P = .0105) and intercondylar axes angle between 1 and 3 months (P = .0013). The PLLA group showed a significantly greater change than the titanium group (P = .0043) and u-HA/PLLA group (P = .0002) in terms of ramus inclination between 1 and 3 months; however, there were no significant differences among the 3 groups in the other measurements for each time interval.

CONCLUSION:

This study suggests that there are no significant differences in postoperative time-course changes among a u-HA/PLLA plate system, PLLA plate system, and conventional titanium plate system.

• Authors: Koichiro Ueki, Katsuhiko Okabe, Mao Miyazaki, Aya Mukozawa, Akinori Moroi, Kohei Marukawa, Kiyomasa Nakagawa, Etsuhide Yamamoto
• Journal: Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons (J Oral Maxillofac Surg) Vol. 69 Issue 5 Pg. 1464-8 (May 2011) ISSN: 1531-5053 [Electronic] United States
• PMID: 21216071 (Publication Type: Comparative Study, Journal Article)
• Copyright: Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

Chemical References

• Biocompatible Materials
• Polyesters
• hydroxyapatite-polylactide
• poly(lactide)
• Durapatite
• Titanium

Topics

• Absorbable Implants
• Adolescent
• Adult
• Biocompatible Materials (chemistry)
• Bone Plates
• Bone Screws
• Cephalometry (methods)
• Chin (pathology)
• Durapatite (chemistry)
• Female
• Follow-Up Studies
• Humans
• Incisor (pathology)
• Jaw Fixation Techniques (instrumentation)
• Male
• Mandible (pathology, surgery)
• Mandibular Condyle (pathology)
• Maxilla (pathology)
• Middle Aged
• Nasal Bone (pathology)
• Orthognathic Surgical Procedures (instrumentation, methods)
• Osteotomy (instrumentation, methods)
• Polyesters (chemistry)
• Prognathism (surgery)
• Retrospective Studies
• Sella Turcica (pathology)
• Titanium (chemistry)
• Young Adult