Abstract
The aim of this study was to identify the load transfer paths in cortical bone and trabecular structure of cancellous bone in the jawbones for loads from endosseous implants. Maxillae were resected from beagle dogs 6 months after implant surgery and imaged using micro-computed tomography (micro-CT). A three-dimensional structure was produced based on the CT data and peri-implant trabecular structure was observed. Load transfer paths were analyzed from the results of three-dimensional finite element analysis. Furthermore, buffer actions in bone trabeculae when strain increased during stress analysis and when loads were applied were observed. Peri-implant bone trabeculae were seen extending into the upper and lower cortical bone from the fixture. The direction of bone trabecular alignment corresponded with the load transfer paths. In addition, analysis with increased strain confirmed that trabecular structures could serve as load buffers. These results suggest that bone trabeculae supporting load transfer from implants undergo remodeling.
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Acknowledgments
The authors would like to thank Dr. Mitsuteru Asai and Mr. Kunihiko Taki of the Department of Micro System Technology, Faculty of Science and Engineering, Ritsumeikan University, for providing valuable technical information. We also thank Professor Masatsugu Hashimoto of the Department of Forensic Anthropology, Tokyo Dental College, for his thoughtful review of the manuscript. The authors also appreciate the enthusiastic cooperation of the staff of the Department of Anatomy, Tokyo Dental College. This study was supported by grants to Satoru Matsunaga (19890223, 20791441) from the Ministry of Education, Science, Sport, Culture and Technology of Japan.
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The authors have no financial relationship with the organization that sponsored the research.
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Ohashi, T., Matsunaga, S., Nakahara, K. et al. Biomechanical role of peri-implant trabecular structures during vertical loading. Clin Oral Invest 14, 507–513 (2010). https://doi.org/10.1007/s00784-009-0332-y
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DOI: https://doi.org/10.1007/s00784-009-0332-y