COMPARATIVE EVALUATION OF MARGIN ADAPTABILITY OF CAD/CAM, IPS EMAX IPS EMPRESS CROWNS - AN IN VITRO STUDY

Dr. D. Rajesh, Dr. Raj Gaurav Singh, Dr. S. Gokul, Dr. C. Nagappan, Dr. N. C. Arun Prasad, Dr. V. Ramkumar

Abstract


Objectives:
1. To compare the marginal fit of CAD/CAM with IPS e-max
2. To compare the marginal fit of CAD/CAM with IPS EMPRESS
3. To compare marginal fit of IPS e-max with IPS EMPRESS
Materials and Method: A typhodont tooth is taken in this study and is embedded in the self cure acrylic block. Preparation of the tooth done with the basic requirements and 30 impressions made using custom tray, and cast poured. These 30 cast divided into three groups as follows, Group I – 10 Cerec CAD/CAM, GroupII – 10 IPS e-max, Group III – 10 IPS EMPRESS . Crowns were fabricated and seated over the master model to check fitness clinically and adjusted if needed. After checking clinically the crowns were cemented to the master model and measurement of the margin is done using Video Measuring System. Six reading were taken for each sample . One way ANNOVA and Tukey HSD statistical analysis were done to determine the results.
Results: This study showed that the marginal adaptability of three different all ceramic is within the clinical limits.
Conclusions: Within the limitation of this study the following conclusions were drawn
 Mean value in Group I (51.1 ± 24.2) is significantly lower than Group III (134.7 ± 46.1) (P<0.0001).
 Mean value in Group II (74.1 ± 26.6) is significantly lower than Group III (134.7 ± 46.1) (P=0.001).
 However, there is no significant difference in mean values between Group I and Group II (P=0.30)


Keywords


All Ceramic, Marginal adaptability, CAD/CAM, IPS e-max, IPS EMPRESS.

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