Advisory Committee Chair
Advisory Committee Members
Date of Award
Degree Name by School
Master of Science (MS) School of Dentistry
Statement of Problem: Provisional (also known as interim or transitional) restorations are important in fixed prosthodontics to evaluate long-term esthetics, phonetics, and function while protecting the tooth preparation from bacterial infiltration and maintaining periodontal health. Recent advances in CAD/CAM technologies have allowed these restorations to be either milled or printed. However, there is a lack of literature regarding the repair and reline of these milled and/or printed restorations. Purpose: To evaluate the repair strength of conventional, milled, and printed resin provisional crown materials with different surface treatments and repair resins. Materials and Methods: This in vitro study examined the shear bond strength of 3 substrates (PMMA powder and liquid, milled PMMA, and printed resin) and 2 repair materials (PMMA powder and liquid and bis-acrylic resin). Each group was treated with 4 types of surface treatment. Each group then was divided into 24 hour or 2,500 thermocycles for a total study group of 48 (n = 10 per group). Shear bond strength was measured followed by further evaluation under microscopy. Results: A two-way ANOVA, one-way ANOVA, and Tukey-Kramer post-hoc tests were used to determine statistical differences in the data as well as any interactions. Significant differences were noted for repair strength of different substrates when different repair resins and surfaces treatments were used. iv Conclusion: Within the limits of this study, jet acrylic and milled PMMA substrates should be repaired with Jet acrylic repair resin whereas printed resin substrates should be repaired with bis-acryl repair resin.
Chang, Bright Jesuk, "Evaluation of Repair Strength of Conventional, Milled, and Printed Resin Provisional Crown Materials with Different Surface Treatments and Repair Resins" (2022). All ETDs from UAB. 591.