The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 29 Issue 2
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- Pages.67-84
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- 1991
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
AN EXPERIMENTAL STUDY ON THE RESIDUAL STRESS AND BOND STRENGTH OF CERAMO-METAL SYSTEM
치과도재용(齒科陶材用) 합금(合金)과 도재간(陶材間)의 잔류응력(殘溜應力) 및 결합강도(結合强度)에 관(關)한 실험적(實驗的) 연구(硏究)
- Kim, Gi-Jin (Department of Prothodontics, College of Dentistry, Chonbuk National University) ;
- Bae, Tae-Seong (Department of Prothodontics, College of Dentistry, Chonbuk National University) ;
- Song, Kwang-Yeob (Department of Prothodontics, College of Dentistry, Chonbuk National University) ;
- Park, Charn-Woon (Department of Prothodontics, College of Dentistry, Chonbuk National University)
- Published : 1991.02.01
Abstract
This study was carried out to investiagate the residual stress caused by the mismatch of thermal expansion and the bond failure resistance of alloy-porcelain specimens. The thermal expansions of alloys and porcelains were measured by using a straight push-rod dilatometer. Porcelain glass transition temperatures, thermal expansion coefficients, and thermal compatibility indices were derived from length-versus-temperature curves. Strain gauges were used to experimentally determine the Young's moduli of porcelains, the residual stresses of porcelain surface, and tensile bond strengths of the specimens of simulated porcelain metal crown. The obtained results were as follows: 1. The coefficients of thermal expansion for alloys were the minimum of
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