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A STRESS ANALYSIS OF THE IMPLANT SUPPORTED OVERDENTURE USING STRAIN GAUGE
조혜원, 권주홍, 이화영,
소속 상세정보
조혜원 ( Cho Hye-Won ) - 원광대학교 치과대학 치과보철학교실
권주홍 ( Kwon Ju-Hong ) - 원광대학교 치과대학 치과보철학교실
이화영 ( Lee Wha-Young ) - 원광대학교 치과대학 치과보철학교실
KMID : 0362419990370010093
Abstract
Stress distribution on mandibular implants supporting overdentures were registered in vitro experimental model by means of 4 rosette gauges which were placed around the implant. The overdenture attachments used in this study were the Resilient Dolder bar, Rigid Dolder bar, Round bar, Hader bar&Dal-Ro attachment. An occlusal jig was placed on the overdenture and the loading sites were 3 points which mimicked working, balancing, and median relations. With 5 and 10kg loading, strains were measured by strain indicator(P-3500, Measurement group, Raleigh, USA), and using these data, maximum and minimum principal stresses and Von Mises stress were calculated and evaluated. The results were as follows: There was a tendency of high stress concentration in the lingual side of the implant, and in the buccal side low stress was developed regardless of the attachment systems. The resilient Dolder bar concentrated highest stress among the attachment systems, and the Round bar and the Dal-Ro attachment provided comparatively low stresses around the implant. The rigid Dolder bar concentrated high stress in the mesial side, and the Dal-Ro attachment developed tensile stress patterns in the lingual and distal sides of the implant at the balancing relation.
키워드
Dental Implants; Implant-supported prothesis; Overdenture attachment; Stress analysis
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