The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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PHYSICAL PROPERTIES OF THE REUSED IPS EMPRESS CERAMIC. PART III. STUDY ON THE STAIN RESISTANCE

반복 사용된 IPS Empress ceramic의 물리적 성질에 관한 연구 Part III. 염색저항성에 관한 연구

  • Jin, Tai-Ho (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Song, Young-Kuk (Department of Prosthodontics, College of Dentistry, Wonkwang University)
  • 진태호 (원광대학교 치과대학 치과보철학교실) ;
  • 송영국 (원광대학교 치과대학 치과보철학교실)
  • Published : 1999.12.01
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Abstract

The purpose of this study was to investigate the possibility on recycling of IPS Empress ceramic for the wide use of esthetically pleased IPS-Empress ceramic in clinical prosthodontic treatment. The specimens were made of first, second, and third pressed IPS Empress ceramic and were immersed in 0.05% methylene blue solution for 24hours. The amount of color change before and after stain-ning was measured with colorimeter(Model Tc-6Fx, Denshoku Co., Tokyo, Japan). The change of ${\Delta}E$ in first pressed ceramic was 18.33 and those in second and third pressed ceramics were 19.33 and 19.93 respectively. Although there was statistical difference among them, the differences were minute and acceptable. From the results of this study, the possibility of recycling of IPS Empress ceramic could be suggested.

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