The Journal of Advanced Prosthodontics

  • 제7권4호
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  • Pages.271-277
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  • 2015
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Evaluation of marginal fit of 2 CAD-CAM anatomic contour zirconia crown systems and lithium disilicate glass-ceramic crown

  • Ji, Min-Kyung (Department of Prosthodontics, School of Dentistry, Chonnam National University) ;
  • Park, Ji-Hee (Department of Prosthodontics, School of Dentistry, Chonnam National University) ;
  • Park, Sang-Won (Department of Prosthodontics, School of Dentistry, Chonnam National University) ;
  • Yun, Kwi-Dug (Department of Prosthodontics, School of Dentistry, Chonnam National University) ;
  • Oh, Gye-Jeong (RIS Foundation for Advanced Biomaterials, Chonnam National University) ;
  • Lim, Hyun-Pil (Department of Prosthodontics, School of Dentistry, Chonnam National University)
  • 투고 : 2014.09.17
  • 심사 : 2015.01.19
  • 발행 : 2015.08.31
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초록

PURPOSE. This study was to evaluate the marginal fit of two CAD-CAM anatomic contour zirconia crown systems compared to lithium disilicate glass-ceramic crowns. MATERIALS AND METHODS. Shoulder and deep chamfer margin were formed on each acrylic resin tooth model of a maxillary first premolar. Two CAD-CAM systems (Prettau$^{(R)}$Zirconia and ZENOSTAR$^{(R)}$ZR translucent) and lithium disilicate glass ceramic (IPS e.max$^{(R)}$press) crowns were made (n=16). Each crown was bonded to stone dies with resin cement (Rely X Unicem). Marginal gap and absolute marginal discrepancy of crowns were measured using a light microscope equipped with a digital camera (Leica DFC295) magnified by a factor of 100. Two-way analysis of variance (ANOVA) and post-hoc Tukey's HSD test were conducted to analyze the significance of crown marginal fit regarding the finish line configuration and the fabrication system. RESULTS. The mean marginal gap of lithium disilicate glass ceramic crowns (IPS e.max$^{(R)}$press) was significantly lower than that of the CAD-CAM anatomic contour zirconia crown system (Prettau$^{(R)}$Zirconia) (P<.05). Both fabrication systems and finish line configurations significantly influenced the absolute marginal discrepancy (P<.05). CONCLUSION. The lithium disilicate glass ceramic crown (IPS e.max$^{(R)}$press) had significantly smaller marginal gap than the CAD-CAM anatomic contour zirconia crown system (Prettau$^{(R)}$Zirconia). In terms of absolute marginal discrepancy, the CAD-CAM anatomic contour zirconia crown system (ZENOSTAR$^{(R)}$ZR translucent) had under-extended margin, whereas the CAD-CAM anatomic contour zirconia crown system (Prettau$^{(R)}$Zirconia) and lithium disilicate glass ceramic crowns (IPS e.max$^{(R)}$press) had overextended margins.

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  9. Cold Atmospheric Plasma Improves Shear Bond Strength of Veneering Composite to Zirconia vol.9, pp.6, 2015, https://doi.org/10.3390/dj9060059
  10. Clinical wear and quality assessment of monolithic and lithium disilicate layered zirconia restorations vol.66, pp.4, 2015, https://doi.org/10.1111/adj.12869