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The aim of this study was to investigate the marginal accuracy of three currently used methods of direct provisional crown construction for the accuracy of marginal fit during in vitro fabrication. Three groups of provisional crowns were investigated using a modified McLean and von Fraunhofer technique. Proprietary provisional crown coping modified to tooth shape with a Bis-acryl temporary material was compared to Bis-GMA and isobutyl methacrylate resin provisional crowns with modified margins using a light cured flowable composite and ‘bead on’ isobutyl methacrylate respectively. Data was analyzed with the Mann Whitney test (a = 0 .05). Reliability was determined using the Bland Altman test. Bis-GMA acryl resin composite relined with flowable composite produced significantly better fitting restorations compared to the two other groups.

journal of dentistry, oral disorders and therapy

An Investigation into the Integrity of Fit of Provisional Crowns made over a Dental Implant Analogue Using Two Current Proprietary Provisional Crown Materials Compared to a Proprietary 'Snap On' Provisional Core