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

Title
Quantitative evaluation of cortical bone thickness and root proximity at maxillary interradicular sites for orthodontic mini-implant placement
Authors
Lim J.-E.Won H.L.Yoon S.C.
Ewha Authors
전윤식
SCOPUS Author ID
전윤식scopus
Issue Date
2008
Journal Title
Clinical Anatomy
ISSN
0897-3806JCR Link
Citation
vol. 21, no. 6, pp. 486 - 491
Indexed
SCI; SCIE; SCOPUS WOS scopus
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. © 2008 Wiley-Liss, Inc.
DOI
10.1002/ca.20671
Appears in Collections:
의과대학 > 의학과 > Journal papers
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