The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

A MEASUREMENT OF DISPLACEMENTS OF CAST FRAMEWORK BY TORCH SOLDERING AND ELECTRIC SOLDERING TECHNIQUES

화염 납착법과 전기 납착법에 의한 금합금 주조체의 변위 양상에 관한 계측학적 연구

  • Jeon, Sang-Won (Department of Prosthodontics, College of Dentistry, Pusan National University) ;
  • Lim, Jang-Seop (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)
  • 전상원 (부산대학교 치과대학 치과보철학교실) ;
  • 임장섭 (부산대학교 치과대학 치과보철학교실) ;
  • 정창모 (부산대학교 치과대학 치과보철학교실) ;
  • 전영찬 (부산대학교 치과대학 치과보철학교실)
  • Published : 1999.12.01
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Abstract

The purpose of this study was to investigate the displacements of cast framework by torch soldering and electric soldering techniques. Specimen had two cylinders and connecting bar that had sectioned with 0.3mm gap at mid point. 10 of total specimens were divided into two groups. In torch soldered group, soldering investment block was made and conventional torch solder-ing procedure was carried out. In electric soldered group, electric soldering was carried out on the master cast without soldering investment block by using electric soldering machine(Dentapunkt DP 7, Kulzer, Germany) After soldering procedure, three dimensional coordinates of two centroids of each cylinder were measured by three dimensional coordinate measuring machine. The intercentroidal displacement and global displacement were calculated and then, these values were compared and evaluated. The results were obtained as follows: 1. Intercentroidal distances of specimens decreased after both soldering procedures, and the decrease in intercentroidal distance was greater for torch soldered group than for electric soldered group 2. Global displacements of torch soldered group were greater than those of electric soldered group.

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