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Acid etching of glass-infiltrated zirconia and its biological response

  • Vu, Van Thi (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Oh, Gye-Jeong (RIS Foundation for Advanced Biomaterial, School of Dentistry, Chonnam National University) ;
  • Yun, Kwi-Dug (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Lim, Hyun-Pil (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Kim, Ji-Won (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Nguyen, Thao Phuong Thi (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University) ;
  • Park, Sang-Won (Department of Prosthodontics, Dental Science Research Institute, School of Dentistry, Chonnam National University)
  • Received : 2016.06.15
  • Accepted : 2016.12.20
  • Published : 2017.04.28

Abstract

PURPOSE. The purpose of this study was to evaluate the influence of acid etching treatment on surface characteristics and biological response of glass-infiltrated zirconia. MATERIALS AND METHODS. A hundred zirconia specimens were divided into four groups depending on surface treatments: untreated zirconia (group Z); acid-etched zirconia (group ZE); glass-infiltrated zirconia (group ZG); and glass-infiltrated and acid-etched zirconia (group ZGE). Surface roughness, surface topography, surface morphology, and Vickers hardness of specimens were evaluated. For biological response test, MC3T3-E1 cell attachment and proliferation on surface of the specimens were examined. The data were statistically analyzed using one-way ANOVA and Tukey's HSD test at a significance level of 0.05. RESULTS. Group ZGE showed the highest surface roughness ($Ra=1.54{\mu}m$) compared with other groups (P < .05). Meanwhile, the hardness of group Z was significantly higher than those of other groups (P < .05). Cell attachment and cell proliferation were significantly higher in group ZGE (P < .05). CONCLUSION. We concluded that effective surface roughness on zirconia could be made by acid etching treatment after glass infiltration. This surface showed significantly enhanced osteoblast cell response.

Keywords

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