The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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AN EXPERIMENTAL STUDY ON PIN RETENTION OF THE DENTAL CEMENTS

치과용(齒科用) Cement가 Pin Retention에 미치는 영향(影響)에 관(關)한 실험적(實驗的) 연구(硏究)

  • Kim, Sung-Kan (Department of Prosthetic Dentistry, Graduate School, Seoul National University)
  • 김성간 (서울대학교 대학원 치의학과 보철학)
  • Published : 1975.12.01
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Abstract

The purpose of this study was to measure the retentive force of various kinds of dental cement. Cross-cutting the half of the occlusal surface, pinholes were prepared on the dentin with No. 557 carbide bur. No. 557 steel burs were cemented in the pinholes and retentive force was measured by removing the burs with Instron testing machine. The Instron testing machine was operated at a rate of 0.2 cm per minute. The following results were obtained : 1. The retentive force of zinc phosphate cement(A), reinforced zinc oxide and eugenol cement and polycarboxylate cement were similar to each other, but that of zinc phosphate cement (A) was the highest of all. 2. The retentive force of zinc phosphate cement (B) was the lowest of all.

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