Related Experiment Video
Updated: Aug 10, 2026
Microhardness Measurements on Tooth and Alveolar Bone in Rodent Oral Disease Models
Published on: April 26, 2024
Microhardness of provisional fixed prosthodontic materials
A M Diaz-Arnold1, J T Dunne, A H Jones
1College of Dentistry, University of Iowa, Iowa City 52245, USA. ana_arnold@uiowa.edu
Statement Of Problem:
Provisional restorations play a critical role in the success of restorative treatment. Thus, the provisional restoration must maintain its surface integrity throughout the restorative process.
Purpose:
This study evaluated the microhardness of 5 prosthodontic provisional materials.
Material And Methods:
Cylindrical samples of 3 bis-acryl resin composites (Integrity, Protemp Garant, Temphase) and 2 methyl methacrylate acrylic resins (Jet, Temporary Bridge) were fabricated (n = 5 per material). Specimens were wet-sanded through 600 grit abrasive and stored in artificial saliva at 37 degrees C for a total of 14 days. Baseline Knoop hardness (KHN) was measured 24 hours after specimen fabrication. Three microhardness measurements were obtained from each specimen. Knoop hardness was again recorded after 14 days of storage.
Results:
ANOVA and Duncan's tests (P<.05) indicated a significant difference between the methyl methacrylate type resins and the bis-acryl resin composites at both time intervals.
Conclusion:
The hardness of most materials (Integrity, Protemp Garant, Jet) decreased over time. All of the bis-acryl resin composite materials exhibited superior microhardness over traditional methyl methacrylate (Jet, Temporary Bridge) resins.
More Related Videos
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
03:02Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
Published on: January 17, 2025
