Technical Accuracy of Dental Laboratories in the Quality and Shade Matching of Porcelain Fused to Metal Crowns: An In Vitro Study.

摘要: Dental laboratories (LABs) are integral to the performance of a dentist in providing successful oral rehabilitation. The aim this study was compare adaptation, contour, contacts, and shade matching different government commercial dental LABs fabrication porcelain fused metal (PFM) crowns. Thirty-two were selected fabricate PFM crowns (one crown each). Marginal proximal evaluated. Evaluation crowns’ quality performed following modified USPHS/FDI criteria. Visual colorimeter assessments employed evaluate matching. Differences between groups examined by Pearson’s Chi-square Fisher’s exact test. marginal adaptation good 81.25%, however contours, compromised 43.75%, 59.38%, 39% all LABs, respectively. acceptable 62.5% 80% cervical third middle regions crowns, respectively, incisal unacceptable nearly 60% LABs. Commercial showed significantly better contours matching, but not adaptation. However, no significant differences found comparison contacts groups.