The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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A STRESS ANALYSIS OF THE IMPLANT - SUPPORTED OVERDENTURE USING STRAIN GAUGE

스트레인 게이지를 이용한 임플랜트 지지 오버덴춰의 응력분석

  • Cho, Hye-Won (Dept. of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Kwon, Joo-Hong (Dept. of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Lee, Wha-Young (Dept. of Prosthodontics, School of Dentistry, Wonkwang University)
  • 조혜원 (원광대학교 치과대학 치과보철학교실) ;
  • 권주홍 (원광대학교 치과대학 치과보철학교실) ;
  • 이화영 (원광대학교 치과대학 치과보철학교실)
  • Published : 1999.02.01
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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 Bolder 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 Bolder 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 Bolder 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.

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