Evaluation of marginal fit of 2 CAD-CAM anatomic contour zirconia crown systems and lithium disilicate glass-ceramic crown

The Journal of Advanced Prosthodontics
Min-Kyung JiHyun-Pil Lim

Abstract

This study was to evaluate the marginal fit of two CAD-CAM anatomic contour zirconia crown systems compared to lithium disilicate glass-ceramic crowns. Shoulder and deep chamfer margin were formed on each acrylic resin tooth model of a maxillary first premolar. Two CAD-CAM systems (Prettau®Zirconia and ZENOSTAR®ZR translucent) and lithium disilicate glass ceramic (IPS e.max®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. The mean marginal gap of lithium disilicate glass ceramic crowns (IPS e.max®press) was significantly lower than that of the CAD-CAM anatomic contour zirconia crown system (Prettau®Zirconia) (P<.05). Both fabrication systems and finish line configurations significantly influenced the absolute marginal discrepancy (P<.05). The lithium disilicate glass ceramic crown (IPS e.max®press) had signifi...Continue Reading

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Citations

Sep 17, 2016·International Journal of Dentistry·Fernando ZaroneRoberto Sorrentino
Jan 19, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Walaa Magdy AhmedRicardo M Carvalho
Nov 2, 2019·Clinical Oral Investigations·Maximiliane Amelie SchlenzBernd Wöstmann
Sep 5, 2020·Clinical and Experimental Dental Research·Walaa Magdy AhmedRicardo M Carvalho
Nov 6, 2020·The Journal of Advanced Prosthodontics·Yadel Hazır Tekin, Yeliz Hayran
Jun 3, 2021·Dentistry Journal·Oskar BunzAndree Piwowarczyk

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Software Mentioned

SPSS Statistics
Dental Designer
ZirkonzahnArchiv

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