The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

FIT OF IMPLANT FRAMEWORKS FABRICATED BY ONE-PIECE CASTING, LASER WELDING, SOLDERING, AND ELECTRIC DISCHARGE MACHINING

일체주조법, 레이저용접법, 납착법, 방전가공법에 의해 제작된 임플란트 보철물의 적합도에 관한 연구

  • Seol, Young-Hoon (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, Sung-Won (Department of naval architecture and ocean engineering, College of Engineering, Pusan National University)
  • 설영훈 (부산대학교 치과대학 치과보철학교실) ;
  • 정창모 (부산대학교 치과대학 치과보철학교실) ;
  • 전영찬 (부산대학교 치과대학 치과보철학교실) ;
  • 강성원 (부산대학교 공과대학 조선해양공학과)
  • Published : 2002.04.01
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Abstract

The purpose of this study was to measure and compare the strains produced by screw-tightening implant frameworks fabricated by aye different fabrication methods; (1) one-piece cast using plastic sleeve, (2) one-piece cast using gold cylinder, (3) laser welding, (4) soldering, and (5) electrical discharge machining, and also to measure and compare the strains produced when the order of screw tightening was changed A research model incorporating eighteen strain gages was made to measure the fit of implant frameworks in three dimensions. Three implants aligned in an arc were fixed on the top ends of the L-shape aluminum bars of the research model, and standard abutments were joined to the implants with abutment screws. Five types of implant framework were placed on the abutments and screwed by a torque wrench using 10 Ncm. Under the conditions of this study, the following conclusions were drawn: 1. The electrical discharge machining group showed the smallest magnitude of strain, followed by the soldering group, the laser welding group, the one-piece cast group using gold cylinder, and the one-piece cast group using plastic sleeve. However, among the magnitude of strain for the remaining groups except the electrical discharge machining group, there were not significant differences. 2. When the order of screw tightening was changed, there were not significant differences in the magnitude of strain. 3. In comparison with the electrical discharge machining group, the laser welding group and the one-piece cast groups showed greater horizontal distortion and the soldering group showed greater horizontal and vertical distortion.

Keywords

References

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