Biomechanical Research of Konus Telescope Removable DentureStress Distribution by Finite Element Analysis

• Main Authors: CHUN-HSIUNG WU, 吳俊雄
• Other Authors: 黃瓊芳
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/z6u7wq

碩士 === 臺北醫學大學 === 醫療器材產業碩士專班 === 102 === Konus telescope removable denture is composed of inner crown and outer crown as retainer. Double crowns were using the friction force or wedge effect to tight the removable denture and the abutment tooth. The decision of konus denture retentive force, which the proper force is between 500~900 g, was determined by konus taper angle of inner crown. To avoid denture separate by adhesive food, or avoid abutment tooth hurt by excessive force, the optimal retentive force is 2~3 kg, which means 3~5 abutment tooth. Usually, the optimal konus taper angle is 6 degree in clinic. Sometime, consider with the viability of abutment tooth, we would choose 4~8 degree to adapt the denture retentive force. In this study, we use finite element analysis to simulate the stress distribution of the periodontal tissue when the occlusal force happened on the konus telescope removable denture. We reconstructed the jaw bone model and premolars model with CT image, and used CAD software to build the konus inner crown, outer crown, implant and abutment, and combined together into a finite element model. Then, use finite element analysis to simulate konus telescope denture when the occlusion forced, and get result of the stress distribution of the bone tissue. In conclusion, the degree and length of inner crown don’t influence the stress of biting force on implant or bone tissue, but the length of outer crown do. Then, with the communication between the dentistry and technician, the patient can get a perfect implant prosthetic and increase the implant success rate.