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http://dx.doi.org/10.14347/kadt.2012.34.4.473

Photoelastic Stress Analysis of the Abutment Surrounding Tissue According to Shape of the Proximal Plate of the RPI Clasp  

Choi, Jung Soo (Busan one dental Lab(Co.))
Kim, Busob (Dept. Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
Publication Information
Journal of Technologic Dentistry / v.34, no.4, 2012 , pp. 473-482 More about this Journal
Abstract
Purpose: The purpose of this study was to investigate the stress distribution of the surrounding tissues according to 3 proximal plate types of the RPI clasp. Methods: The removeable partial denture which mandibular right and left second premolars and mandibular molars were lost was attached to a three dimensional photo elastic epoxy resin model. Then 120N of vertical load was applied. After 3-dimensional photoelastic stress analysis was used to record the isochromatic fringe patterns. Results: Kratochvil type guiding plane exhibited little uniform stress distribution on load center and alveolar ridge, but higher stress concentration on buccal surface of second premolar. Krol type guiding plane exhibited the stress concentration on the front of load center and relatively higher stress concentration on buccal surface of first premolar. However, this type had no effect on canine. Researcher type guiding plane showed the stress concentration on second premolar and molar, but the little stress distribution on first premolar. Conclusion: In all types, excessive stress concentration was appeared and three types were not significant different.
Keywords
proximal plate; RPI clasp; photoelasticity stress analysis; abutment distribution of stresses;
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