Journal
JOURNAL OF DENTAL RESEARCH
Volume 87, Issue 9, Pages 861-865Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/154405910808700904
Keywords
distraction osteogenesis; osteotomy; corticotomy; tooth movement; regional acceleratory phenomenon
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Funding
- AO North America Foundation
- Chalmer Lyons Academy of Oral and Maxillofacial Surgeons
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Corticotomy-assisted and osteotomy-assisted tooth movement involves surgical incisions through the alveolar bone. To ascertain whether teeth move by distraction osteogenesis or by regional accelerated phenomenon ( RAP), we randomly assigned 30 Sprague-Dawley rats to one of 5 experimental groups: corticotomy alone, corticotomy-assisted tooth movement, osteotomy alone, osteotomy-assisted tooth movement, or tooth movement alone. Each animal was imaged by microtomography immediately after surgery, after 21 days, and after 2 months. After 21 days, regional accelerated phenomenon was observed in the alveolar bone of the corticotomy-treated animals and distraction osteogenesis in the osteotomy-assisted tooth movement animals. Pixel count data were analyzed by nested ANOVA for 5 experimental groups, split-mouth controls, 3 levels along the root, and 5 sites per level. The most demineralized sites after 21 days differed for each of the experimental groups. Our study indicates that osteotomies and corticotomies induce different alveolar bone reactions, which can be exploited for tooth movement.
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