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KMID : 0354619930050010241
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Journal Dankook Dental Research Institute
1993 Volume.5 No. 1 p.241 ~ p.258
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A Study on the Two-Dimensional Finite Element Analysis of Stress Induced by the Different Materials of Crown in Dental Implant Prosthesis
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Abstract
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The osseointegrated implant implant transmits any stress waves or shock to the bone around the fixture because of direct contact with bone. The purpose of this study was to compare the stress distribution due to the different materials used for
the
dental crown in the implant prosthesis.
The used dental materials were ADA type III gold alloy, acrylic resin, composite resin porcelain, Cr-Co alloy, and their stresses were analyzed by the method of two dimension finite element.
@ES The results were as follows :
@EN 1. In the interface A and B, all the tested samples demonstrated maximum stress value at the cervical portion implants.
2. In the interface A and B, there was no significant variations in stress value among the materials used for the superstructure.
3. In vertical section, maximum stress value appeared at the cusp tip of crown, and the differences of the stress distribution according to the dental materials were large at crown portion.
4. In the composite resin and porcelain, high stress concentrations were observed at the implant super-structure, and stress value was high in the case of the Cr-Co alloy but low in the cases of the gold alloy and the acrylic resin.
5. The Cr-Co alloy crown showed the narrowed stress distribution but high stress values in the in terface between implant fixture and bony tissue.
6. Dental crown materials showed great influences on the implant abutment but small influences on the interface of bone and implant fixture.
7. The amount ant distribution of stress induced by occlusal forces were more influenced by fixture design and load direction rather than crown material itself.
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