Lee Hsiao-Chien, Tsai Pei-I, Huang Chih-Chieh, Chen San-Yuan, Chao Chuen-Guang, Tsou Nien-Ti
Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu 31040, Taiwan.
Biomed Res Int. 2017;2017:1970680. doi: 10.1155/2017/1970680. Epub 2017 Feb 12.
The inclusion of a healing chamber in dental implants has been shown to promote biological healing. In this paper, a novel numerical approach to the design of the healing chamber for additive-manufactured dental implants is proposed. This study developed an algorithm for the modeling of bone growth and employed finite element method in ANSYS to facilitate the design of healing chambers with a highly complex configuration. The model was then applied to the design of dental implants for insertion into the posterior maxillary bones. Two types of ITI® solid cylindrical screwed implant with extra rectangular-shaped healing chamber as an initial design are adopted, with which to evaluate the proposed system. This resulted in several configurations for the healing chamber, which were then evaluated based on the corresponding volume fraction of healthy surrounding bone. The best of these implants resulted in a healing chamber surrounded by around 9.2% more healthy bone than that obtained from the original design. The optimal design increased the contact area between the bone and implant by around 52.9%, which is expected to have a significant effect on osseointegration. The proposed approach is highly efficient which typically completes the optimization of each implant within 3-5 days on an ordinary personal computer. It is also sufficiently general to permit extension to various loading conditions.
在牙科植入物中设置愈合腔已被证明可促进生物愈合。本文提出了一种用于增材制造牙科植入物愈合腔设计的新型数值方法。本研究开发了一种骨生长建模算法，并在ANSYS中采用有限元方法来辅助设计具有高度复杂结构的愈合腔。然后将该模型应用于设计植入上颌后牙区的牙科植入物。采用两种初始设计为带有额外矩形愈合腔的ITI®实心圆柱形螺纹植入物来评估所提出的系统。这产生了几种愈合腔配置，然后根据周围健康骨的相应体积分数对其进行评估。这些植入物中最佳的一种所形成的愈合腔周围的健康骨比原始设计多约9.2%。优化设计使骨与植入物之间的接触面积增加了约52.9%，预计这将对骨整合产生显著影响。所提出的方法效率很高，在普通个人计算机上通常可在3至5天内完成每个植入物的优化。它也具有足够的通用性，能够扩展到各种加载条件。
