Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Effects of Heat-treatment on Crystallization and Mechanical Properties of Glass ceramics for Dental crown prosthesis in the system $CaO-MgO-SiO_{2}-P_{2}O_{5}-TiO_2$

치관보철용 $CaO-MgO-SiO_{2}-P_{2}O_{5}-TiO_2$계 글라스 세라믹의 결정화와 기계적 물성에 미치는 열처리 조건의 영향

  • Chung, In-Sung (Dept. of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan) ;
  • Kim, Bu-Sob (Dept. of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan)
  • 정인성 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 김부섭 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Published : 2004.07.01
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Abstract

Glass ceramics for dental crown prosthesis were prepared by crystallization of CaO-MgO-SiO2-P2O5-TiO2 glasses. Their crystallization behaviors have been investigated as a function of heattreatment temperature and holding time in relation to mechanical properties. The results are as follows: Vickers hardness and bending strength of glass ceramics increased due to the precipitation of apatite, whitlockite, $\beta$-wollastonite, magnesium titanate, and diopside crystal phases within glass matrix. The final crystalline phase assemblages and the microstructures of the glass ceramics were found to be dependent on heat-treatment temperature and holding time. Vickers hardnes and bending strength of glass ceramics increased with increasing heat-treatment temperature and holding time.

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