Design and analysis of a novel implant with buffering mechanism

• Main Authors: Yun-Han Lin, 林芸含
• Other Authors: 陳文斌
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/72w5va

碩士 === 國立臺北科技大學 === 製造科技研究所 === 99 === With the advancement of science and technology, dental implant system has become an important treatment option for edentulous patients. A successful dental implant treatment depends on the initial stability and osseointegration as found from previous literatures. Some literature also pointed out that by adding elastomeric component into the dental implant system can provide cushioning and shock-absorbing capabilities of a natural tooth. Therefore, the aim of this study was to design and analyze the biomechanical behavior of a novel dental implant system with buffering mechanism by using finite element analysis. In the first part of the study, three different commercial dental implants including Taiwan implant, Branemark implant, Ti-one 101 implant were analyzed by observing the stress on the alveolar bone and the performances of the three dental implants were evaluated. The thread geometry of the novel dental implant system was created based on the Branemark thread design. In the second part of the study, the novel dental implant with an elastomeric component or with a conical spring was designed to provide the similar mobility of a natural tooth. The objective of the design was to avoid the exposure of the elastomer to outside oral fluid and to achieve the biomechanical mobility of a natural teeth. The force-displacement curve of the novel dental implant and the stress distribution of the surrounding alveolar bone were observed under axial and lateral loading conditions. Furthermore, the results were compared with those of a traditional dental implant without the buffering mechanism. The results from the first part of the study showed that the stresses are concentrated on the cortical bone for all three commercial implants. However, there was no significant difference on the maximum von Mises stress for all three commercial dental implants. The thread geometry of the Branemark implant was selected for the novel implant for its better mechanical characteristic according to the stress patterns. As seen from the force-displacement curves of the novel dental implant, it exhibits a larger displacement during the initial loading condition; but only little displacement was allowed when larger loading was applied. The biomechanical behavior of the novel implant is similar to that of a natural tooth. The novel dental implant could provide initial mobility and delayed loading capability and could therefore decrease the stress on the alveolar bone as compared with the conventional dental implant. The fabrication of this novel dental implant is underway and its biomechanical performance will be further tested. It is hoped that its clinical application can be realized in the future.