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KMID : 0376319920040010127
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Dental Journal of CNU
1992 Volume.4 No. 1 p.127 ~ p.145
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A Two dimensional stress analysis of fixed prosthesis with osseointegrated implant as an intermediate abutment
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Abstract
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The purpose of this study was to analyze the stress distribution of the natural teeth , the implant, the prosthesis and the supporting tissue according to the types of implant and connection modality in the five-unit fixed partial denture with a
implant
pier abutment.
A Two dimensional stress analysis model was constructed to represent a mandible mission the first and second premolars and first molar. The model contained a canine and second molar as abutment teeth and implant pier abutments with and without
stress-absorbing element. Finite element models were created and analyzed using software ANSYS 4.4A for IBM 32bit personal computer.
@ES The results obtained were as follows:
@EN 1. Implant group, compared to the natural teeth group, showed a maximum principal stress at the superior portion of implants and a stress concentration at the neck and end portion.
2. Maximum principal stress and maximum Von Mises stress were always lower in the case of rigid connection than nonrigid connection.
3. A cylinder type implant with stress absorbing element and screw type implant were generally similar in the stress distribution pattern.
4. A screw type implant, compared to the cylinder type implant, showed a relatively higher stress concentration at both neck and end portion of it.
5. Load B cases showed higher stress concentration on the posterior abutments in the case of nonrigid connector than rigid connector.
6. A maximum displacement was always lower in the case of rigid connection than nonrigic connection.
These results suggest that osseointegrated implant can be used as an intermediate abutment.
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