The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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A STUDY ON THE RETENTIVE CAPABILITY OF CAST POST CEMENTED WITH SOME DENTAL CEMENTS

수종 치과용 시메트에 의한 주조 포오스트의 유지력에 관한 연구

  • Lee, Chang-Ho (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity) ;
  • Chang, Ik-Tae (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity) ;
  • Kim, Kwang-Nam (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity)
  • 이창호 (서울대학교 치과대학 보철학교실) ;
  • 장익태 (서울대학교 치과대학 보철학교실) ;
  • 김광남 (서울대학교 치과대학 보철학교실)
  • Published : 1988.12.01
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Abstract

An in vitro study was performed to compare the retentive value of cast post cemented with three commonly used cements and one composite resin. Twenty cast posts were made from twenty extracted lower premolars. The samples were randomly divided into four groups. The first group was cemented with zinc phosphate cement, the second group with polycarboxylate cement, the third group with glass-ionomer cement, and the fourth group with composite resin. The tensile load test was performed on an Instron testing machine with crosshead speed of 2 mm/min and the results were compared statistically. The results were as follows ; 1. The mean value of tensile break force of cemented cast post was 23.36Kg in case of zinc phosphate cement, 16.28Kg in case of polycarboxylate cement, 22.09Kg in case of glass-ionomer cement , and 26.88Kg in case of composite resin. 2. Retention was not significantly different among zinc phosphate cement, glass-ionomer cement and composite resin. 3. Polycarboxylate cement was found to be less retentive than zinc phosphate cement, glass-ionomer cement , and composite resin.

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