Comparison of the precision of different CAd/CAM zirconia dental prostheses Jeong In-Ho1, Park Soo-Chul2,*, Kim Sung-Min2 1Associate Professor Department of Dental Technology, Gimcheon University, South Korea 2Assistant Professor, Department of Dental Technology, Gimcheon University, South Korea *Corresponding Author: Soo-Chul Park Assistant Professor, Department of Dental Technology, Gimcheon University, 214 Daehak-ro, Gimcheon-si, Gyeongsangbuk-do, 39528, Korea Email: remedios-1@hanmail.net
Online published on 16 October, 2018. Abstract In this study, we compare the quality of zirconia cores manufactured using CAD/CAM systems by evaluating their marginal gap and internal fit. The surface of each sample was magnified to 300x and they were all compared. Statistical analysis was performed using SPSS Win 21.0 after establishing internal gaps of 0 mm, 5mm, 10mm, and 20mm for the Upcera and Cameleon zirconia, the total number of 80 abutments were compared in a graph showing the mean and standard deviation for each sample. The internal gap measurements of each sample were analysed using a one-way ANOVA and then a Scheffe post-hoc test. The values produced by this study are slightly different from those in previous studies because the CAD/CAM equipment used in other countries is more spherical than in South Korea, and we have suggested the possible scanning and equipment processing errors that may cause. The values obtained here by measuring the internal gaps are more precise than the values obtain in previous experiments. Overall, the quality of fixed implants manufactured using CAD/CAM systems is found to be excellent. However, it is insufficient to evaluate their quality only considering marginal gaps and further research on more diverse factors will be necessary. Top Keywords CAD/CAM systems, Dental gypsum models, Implant, Manufacturing, Zirconia. Top |