| Summary: | 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.
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