M S Block1, D Cervini, A Chang, G B Gottsegen. 1. Department of Oral and Maxillofacial Surgery, Louisiana State University School of Dentistry, New Orleans, USA.
Abstract
PURPOSE: This study used the principle of distraction osteogenesis to advance the anterior maxilla of the dog using a totally tooth-supported distraction device. MATERIALS AND METHODS: After an anterior maxillary osteotomy, the distraction device was activated 0.5 mm every 12 hours to advance the anterior segment 10 mm in 10 days. RESULTS: Serial tooth and radiographic measurements indicated that on the 10th day the average tooth advancement was 8.4 mm +/- 1.5 mm and the average skeletal advancement was 4.0 mm +/- 1.5 mm. After 6 weeks the average tooth advancement was 7.2 +/- 1.6 mm and the average skeletal advancement was 3 +/- 1.3 mm. At 3 months the tooth advancement was 6.2 +/- 1.5 mm and at 6 months the tooth advancement was 5.0 +/- 1.1 mm. Bone healing was present in all animals. CONCLUSION: This results of this study indicate that a tooth-borne maxillary distraction device will result in significantly greater dental movement than skeletal movement and that skeletal fixation may be needed for appliances used to advance the maxilla.
PURPOSE: This study used the principle of distraction osteogenesis to advance the anterior maxilla of the dog using a totally tooth-supported distraction device. MATERIALS AND METHODS: After an anterior maxillary osteotomy, the distraction device was activated 0.5 mm every 12 hours to advance the anterior segment 10 mm in 10 days. RESULTS: Serial tooth and radiographic measurements indicated that on the 10th day the average tooth advancement was 8.4 mm +/- 1.5 mm and the average skeletal advancement was 4.0 mm +/- 1.5 mm. After 6 weeks the average tooth advancement was 7.2 +/- 1.6 mm and the average skeletal advancement was 3 +/- 1.3 mm. At 3 months the tooth advancement was 6.2 +/- 1.5 mm and at 6 months the tooth advancement was 5.0 +/- 1.1 mm. Bone healing was present in all animals. CONCLUSION: This results of this study indicate that a tooth-borne maxillary distraction device will result in significantly greater dental movement than skeletal movement and that skeletal fixation may be needed for appliances used to advance the maxilla.
Authors: Sruthi Rao Janardhan; S M Kotrashetti; J B Lingaraj; P X Pinto; K M Keluskar; Siddharth Jain; Piyush Sone; Santhosh Rao Journal: Sultan Qaboos Univ Med J Date: 2013-06-25
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