Year-end Sale % OFF 
Abstract
This study concerned the effect of heat treatment during setting on the physical properties of four resin-based provisional restorative materials: Duralay (polymethyl methacrylate), Trim II (polyethyl methacrylate), Luxatemp (bis-acrylic composite), and Protemp 4 (bis-acrylic composite). Specimens were prepared at 23, 37, or 60 °C for evaluation of flexural strength, surface roughness, color change and marginal discrepancy. Flexural strength was determined by a three-point bending test. Surface profile was studied using atomic force microscopy. Color change was evaluated by comparing the color of the materials before and after placement in coffee. A travelling microscope helped prepare standardized crowns for assessment of marginal discrepancy. Flexural strength of all tested materials cured at 23 °C or 37 °C did not significantly change. The surface roughness and marginal discrepancy of the materials increased at 60 °C curing temperature. Marginal discrepancies, color stability, and other physical properties of materials cured at 23 °C or 37 °C did not significantly change. Flexural strength of certain provisional materials cured at 60 °C increased, but there was also an increase in surface roughness and marginal discrepancy.
Highlights
Fabrication of a provisional prosthesis or restoration is an essential procedure for all indirect restoration and an important stage in prosthodontics [1]
This study aimed to evaluate the effect of heat treatment on the flexural strength, surface profile, color stability and marginal discrepancy of four commonly used provisional restorative materials
Material products and curing temperature both contribute to an interaction effect on flexural strength, surface roughness, color difference, and marginal discrepancy of all the materials (p < 0.01, interaction p < 0.001)
Summary
Fabrication of a provisional prosthesis or restoration is an essential procedure for all indirect restoration and an important stage in prosthodontics [1]. Provisional restorations protect prepared teeth, stabilize the maxillary and mandibular teeth’s relationship, address the patient’s aesthetic concerns and keep the patient comfortable from the initial tooth preparation appointment to the cementation of the permanent restoration [2]. They allow evaluation of the tooth preparation, maintain gingival health, and serve as an adjunct to periodontal therapy and as an assessment of the patient’s oral hygiene. PMMA first appeared around 1940 and remains the most common material for fabrication of provisional restorations and dentures [3] It is strong and lightweight with a high coefficient of thermal expansion.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
