TY - JOUR T1 - Evaluation of marginal fit of 2 CAD-CAM anatomic contour zirconia crown systems and lithium disilicate glass-ceramic crown. AU - Ji,Min-Kyung, AU - Park,Ji-Hee, AU - Park,Sang-Won, AU - Yun,Kwi-Dug, AU - Oh,Gye-Jeong, AU - Lim,Hyun-Pil, Y1 - 2015/08/18/ PY - 2014/09/17/received PY - 2015/01/07/revised PY - 2015/01/19/accepted PY - 2015/9/3/entrez PY - 2015/9/4/pubmed PY - 2015/9/4/medline KW - Absolute marginal discrepancy KW - Anatomic contour zirconia crown KW - CAD-CAM KW - Lithium disilicate glass ceramic crown KW - Marginal fit KW - Marginal gap SP - 271 EP - 7 JF - The journal of advanced prosthodontics JO - J Adv Prosthodont VL - 7 IS - 4 N2 - 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®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. RESULTS: 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). CONCLUSION: The lithium disilicate glass ceramic crown (IPS e.max®press) had significantly smaller marginal gap than the CAD-CAM anatomic contour zirconia crown system (Prettau®Zirconia). In terms of absolute marginal discrepancy, the CAD-CAM anatomic contour zirconia crown system (ZENOSTAR®ZR translucent) had under-extended margin, whereas the CAD-CAM anatomic contour zirconia crown system (Prettau®Zirconia) and lithium disilicate glass ceramic crowns (IPS e.max®press) had overextended margins. SN - 2005-7806 UR - https://www.unboundmedicine.com/medline/citation/26330973/Evaluation_of_marginal_fit_of_2_CAD_CAM_anatomic_contour_zirconia_crown_systems_and_lithium_disilicate_glass_ceramic_crown_ DB - PRIME DP - Unbound Medicine ER -