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Cortical bone thickness and root proximity at mandibular interradicular sites: implications for orthodontic mini-implant placement

Title
Cortical bone thickness and root proximity at mandibular interradicular sites: implications for orthodontic mini-implant placement
Authors
Lim, Ju-EunLim, Won-HeeChun, Youn-Sic
Ewha Authors
전윤식
SCOPUS Author ID
전윤식scopus
Issue Date
2008
Journal Title
KOREAN JOURNAL OF ORTHODONTICS
ISSN
1225-5610JCR Link
Citation
vol. 38, no. 6, pp. 397 - 406
Keywords
Mini-implantCortical bone thicknessRoot proximity
Publisher
KOREAN ASSOC ORTHODONTISTS
Indexed
SCOPUS; KCI WOS
Abstract
Objective: The purpose of this study was to provide clinical guidelines to indicate the best location for mini-implants as it relates to the cortical bone thickness and root proximity. Methods: CT images from 14 men and 14 women were used to evaluate the buccal interradicular cortical bone thickness and root proximity from mesial to the central incisor to the 2nd molar. Cortical bone thickness was measured at 4 different angles including 0 degrees, 15 degrees, 30 degrees, and 45 degrees. Results: There was a statistically significant difference in cortical bone thickness between the second premolar/first permanent molar site, central incisor/central incisor site, between the first/second permanent molar site and in the anterior region. A statistically significant difference in cortical bone thickness was also found when the angulation of placement was increased except for the 2 mm level from the alveolar crest. Interradicular spaces at the 1st/2nd premolar, 2nd premolar/1st permanent molar and 1st/2nd permanent molar sites are considered to be wide enough for mini-implant placement without root damage. Conclusions: Given the limits of this study, mini-implants for orthodontic anchorage may be well placed at the 4 and 6 mm level from the alveolar crest in the posterior region with a 30 degrees and 45 degrees angulation upon placement. (Korean J Orthod 2008; 38(6):397-406)
DOI
10.4041/kjod.2008.38.6.397
Appears in Collections:
의과대학 > 의학과 > Journal papers
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