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Computational and Mathematical Methods in Medicine
Volume 2013, Article ID 608570, 8 pages
Research Article

Location of the Mandibular Canal and Thickness of the Occlusal Cortical Bone at Dental Implant Sites in the Lower Second Premolar and First Molar

1School of Dentistry, College of Medicine, China Medical University, 91 Hsueh-Shih Road, Taichung 40402, Taiwan
2Department of Dentistry, China Medical University and Hospital, Taichung 404, Taiwan
3Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung 404, Taiwan
4Department of Biomedical Engineering, Hungkuang University, Taichung 433, Taiwan

Received 15 June 2013; Revised 4 September 2013; Accepted 23 September 2013

Academic Editor: Tianye Niu

Copyright © 2013 Jui-Ting Hsu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The objective of this study was to evaluate the location of the mandibular canal and the thickness of the occlusal cortical bone at dental implant sites in the lower second premolar and lower first molar by using dental cone-beam computed tomography (CBCT). Seventy-nine sites (47 second premolar and 32 first molar sites) were identified in the dental CBCT examinations of 47 patients. In this study, 4 parameters were measured: (1) MC—the distance from the mandibular canal to the upper border of the mandible; (2) CD—the distance from the mandibular canal to the buccal border of the mandible; (3) MD—the distance from the mandibular canal to the lingual border of the mandible; (4) TC—the thickness of the cortical bone at the occlusal side. A statistical analysis was employed to compare the size and differences between these 4 parameters at the lower second premolar and lower first molar. Regarding the MC and MD, the experimental results showed no statistical difference between the first molar and second premolar. However, the TC for the second premolar was greater than that of the first molar. Thus, careful consideration is necessary in choosing the size of and operation type for dental implants.