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KMID : 0362419970350030486
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Journal of Korean Academy of Prosthodontics
1997 Volume.35 No. 3 p.486 ~ p.503
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A PHOTOELASTIC STRESS ANALYSIS ON TOOTH SUPPORTING STRUCTURE AND RESIDUAL RIDGE ACCORDING TO DENTURE DESIGN FOR REMAINING MANDIBULAR CANINES
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Kim Il-Pyung
Koh Joon-Won
Jin Tai-Ho
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Abstract
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The purpose of this study was to evaluate the stress patterns developed in abutment and residual ridge according to removable denture design in case of remaining mandibular cannies The removable denture design in this study were as foolows ; 1. Removable partial denture with non-splinted abutment 2. Removable partial denture with splinted abutment 3. Overdenture with telescopic crown 4. Overdenture with O-Ring attachment 5. Overdenture with combination bar attachment Photoelastic stress analysis was used to record the isochromatic fringe patterns and to calculate principal stress components at measuring points. The results were as follows : 1. In case of removable partial denture with non-splinted abutment, stress of root area at the loaded side was the largest. No significant differences in stress of root area were observed between loaded side and unloaded side. 2. No significant differences in stress of residual ridge at the loaded side were observed between removable partial denture with splinted abutment and removable partial denture with non-splinted abutment 3. In case of combination bar attachment retained overdenture stress of root area was the largest and in case of telescopic crown retained overdenture stress of root area was lowest. 4. In case of attachment retained overdenture, stress of residual ridge was lower but stress of root area was larger than in case of removable partial denture
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