The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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Effect of intra-crown cantilever on mechanical strength of internal conical joint type implant

치관 내 캔틸레버 양에 따른 내측 연결 형태 임플란트의 기계적 강도에 대한 연구

  • Yun, Mi-Jung (Department of Prosthodontics, College of Dentistry Pusan National University) ;
  • Huh, Jung-Bo (Department of Prosthodontics, College of Dentistry Pusan National University) ;
  • Jeong, Chang-Mo (Department of Prosthodontics, College of Dentistry Pusan National University) ;
  • Jeon, Young-Chan (Department of Prosthodontics, College of Dentistry Pusan National University) ;
  • Kang, Eun-Sook (Department of Prosthodontics, In-Je University Haeundae Paik Hospital)
  • 윤미정 (부산대학교 치의학전문대학원 보철학교실) ;
  • 허중보 (부산대학교 치의학전문대학원 보철학교실) ;
  • 정창모 (부산대학교 치의학전문대학원 보철학교실) ;
  • 전영찬 (부산대학교 치의학전문대학원 보철학교실) ;
  • 강은숙 (인제대학교 해운대 백병원 보철과)
  • Received : 2015.01.02
  • Accepted : 2015.04.10
  • Published : 2015.05.01
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Abstract

Purpose : The purpose of this study was to evaluate the effect of amount of cantilever in intra-crown according to implant fixture position on mechanical strength of internal conical joint type implant. Materials and Methods : Internal conical joint type implant fixture, abutment screw, abutment was connected and gold alloy prostheses were fabricated and cemented on abutment. For fatigue fracture test, the specimens were loaded to the 350 N, 2,000,000 cycle on 3, 4, 5, and 6 mm off-center of gold alloy prostheses. The fracture pattern of implant component was observed. Results : No fatigue fracture found on 3 and 4 mm group. But initial crack pattern found on 3 specimens of 4 mm group. Fatigue fracture found on all specimens of 5 mm group. But complete fracture was not observed. One specimen of 6 mm group fracture completely. Implant fixture fracture wax not observed. Conclusion : The mechanical failure of implant prostheses increased with the loading area farther from center of implant fixture. To reduce mechanical problem of internal joint type implant, surgical and prosthetic consideration is needed.

Keywords

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