Biomechanical role of peri-implant trabecular structures during vertical loading.
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.
Ohashi
Takashi
T
Department of Anatomy, Tokyo Dental College, Chiba, Japan.
Matsunaga
Satoru
S
Nakahara
Ken
K
Abe
Shinichi
S
Ide
Yoshinobu
Y
Tamatsu
Yuichi
Y
Takano
Naoki
N
D000818:Animals; D001696:Biomechanical Phenomena; D001732:Bite Force; D016723:Bone Remodeling / Q000502:physiology; D003198:Computer Simulation; D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D004285:Dogs; D004735:Energy Transfer; D020342:Finite Element Analysis; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D013314:Stress, Mechanical; D055114:X-Ray Microtomography / Q000379:methods
D015921:Dental Implants
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