*YOU CAN SIGN UP FOR THE PATTERSON SERVICE CLUB FOR A MONTHLY FEE AND OBTAIN THE SOFTWARE UPDATES AT NO CHARGE. Change in ownership form to be issued with this purchase. Overall condition is excellent! 90- Day parts warranty from the date of delivery. All rights reserved.2009 Blue Cam 4.3 Software Windows 7 - 64 Bit Camera calibration kit Radio to connect to an MCXL Camera in excellent condition. Marginal adhesive gap can affect the trial of a full crown.ĬAD-CAM Knife-edge preparation Spacing parameters Try-in phase.Ĭopyright © 2018 Japan Prosthodontic Society. In this group, the failures were mostly minor chippings, while the other groups had mostly major chippings and fractures. Tukey's test showed that restorations of the KE 150-150-300 group can withstand a load significantly higher than that of other groups (p<0.01). Two-way ANOVA revealed statistically significant differences between pairs of means (p<0.05). The fracture values, ordered from least to most resistant, were: KE 150-50-300 group, CHA 150-50-0 group, KE 150-50-0 group and KE 150-150-300 group. The level of significance was set at P=0.05. Differences in means were compared using two-way ANOVA and a post-hoc test (Tukey Test). The crowns were loaded before cementation by using an Instron machine to simulate the masticatory load applied during a trial. The groups differed in type of preparation (knife-edge (KE) or chamfer (CHA)) and spacing parameters: spacer (0 or 150μm), marginal adhesive gap (10 or 50 or 150μm) and margin thickness (0 or 300μm).
Fifteen full crowns were manufactured for four groups using CEREC.
The teeth were scanned and two Co-Cr alloy replicas were made. To evaluate the influence of the preparation design and spacing parameters on the risk of chipping of crowns made by CEREC Bluecam before cementation.Ī knife-edge preparation and a chamfer preparation were made on upper premolars.
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