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Quantitative evaluation of cortical bone thickness and root proximity at maxillary interradicular sites for orthodontic mini-implant placement

Cited 23 time in Web of Science Cited 24 time in Scopus
Authors
Lim, Won Hee; Lim, Ju-Eun; Chun, Yoon Sic
Issue Date
2008-08
Publisher
Wiley-Blackwell
Citation
Clinical Anatomy 21:486-491
Keywords
cortical bone thicknessroot proximitydifferent insertion angle
Abstract
Few studies have evaluated interradicular anatomy for cortical bone thickness and root proximity when placing a mini-implant for orthodontic anchorage. The purpose of this study was to provide a clinical guideline to indicate the best location, according to different insertion angles, for placement of a mini-implant with respect to the thickness of cortical bone and root proximity. CT images from 14 men and 14 women (mean age, 27 years; range, 23-35 years) were used to evaluate the buccal interradicular cortical bone thickness and root proximity from and mesial to the central incisor to the second molar. A measure of cortical bone thickness was performed at four different angles. Generally, thin cortical bone thickness was found in the central/central incisors and central/lateral incisors interradicular sites. Cortical bone thickness increased significantly as the insertion angle increased except for interradicular sites at the 2 mm level from the alveolar crest. The volume of cortical bone engagement increased significantly at the 4 and 6 mm levels from the alveolar crest with an insertion angle of 30° and 45° in most interradicular sites. The lateral incisor/canine and second premolar/first molar interradicular sites showed greater space between roots compared with other sites, although this was not statistically significant. Based on the findings of this study, we recommend that mini-implants be placed at the 4 and 6 mm levels from the alveolar crest with 30° and 45° angles for the majority of interradicular sites to ensure better cortical bone to mini-implant contact without root damage.
ISSN
0897-3806
Language
English
URI
https://hdl.handle.net/10371/69628
DOI
https://doi.org/10.1002/ca.20671
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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