| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 107 === The choice of the thread structure of the implant plays a crucial role in the dental treatment. This study was undertaken to: i - Identify the optimum design of the thread, ii - Investigate the impacts of different implant thread models on bone implant-interface stress distribution, iii - Investigate Static and other behaviors of implants. On the Other hand, At the interface of the jawbone and roots of teeth, the effect of stress distribution in the interface of cortical bone and implant (PDL) is evaluated along with the numerical analysis.
A full mechanical system design for a dental implant model was developed within the range of the study. The design was optimized using the FEA depending on the design strategic objectives. In the First part, five implants with different thread profile designs considered and the pattern of the stress distribution in cortical bone and Cancellous bone are evaluated using FEA. The dimensions were in according with the commercial thread configuration standards for dental implant. For the Interface, PDL is designed as a third party which has 0.1mm thickness dimension. The 3D CREO Parametric V5 software was used for implants as well as interface 3D modeling and Simulated in ABAQUS V2018 FEA Software. Applied load for both cases has a magnitude of 150N at 30o Angulation.
The results from the FEA showed that the stress in Von Mises has become more mesiodistally both in the implants and in the Interface. Maximum stresses found concentrated at the cortical bone and transferred to the first thread of the implant. The Simulation shows that the least stresses were observed at the cancellous bone and maximum at the implant. The use of various thread designs and different conditions of osseointegration did not affect the patterns of stress distribution in the supporting bone. In the Interface the stresses are distributed in the direction of load is applied.
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