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Updated: Aug 19, 2026
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Mechanical property characterization of a novel directly-placed ceramic restorative material
Jónas Geirsson1, Stephen C Bayne, Edward J Swift
1Department of Operative Dentistry, University of North Carolina at Chapel Hill, School of Dentistry, 413 Brauer Hall, CB# 7450, Chapel Hill, NC 27599-7450, USA. jonas@akranes.com
Purpose:
To compare, in vitro, the mechanical properties of a directly-placed ceramic restorative material (Doxadent) to glass-ionomer (Fuji IX), hybrid composite control (Z250) and amalgam control (Tytin).
Methods:
Diametral tensile strength (DTS), compressive strength (CS), and Vickers hardness number (VHN) were measured for 10 specimens per group (n = 480 total) with time (1 hour, 24 hours, 1 week, 4 weeks). CS and DTS specimens were cylinders (4 x 8 mm). VHN specimens were disks (9.5 x 1 mm). Specimens were prepared following manufacturers' instructions, stored in deionized water (37 degrees C), and tested in 100% humidity (23 degrees C). CS and DTS specimens were loaded to failure (Instron, CHS = 0.5 mm/minute). VHN discs were indented. Data were analyzed using ANOVAand Tukey's test (P < 0.05) for pairwise comparisons of group means at each time.
Results:
In CS and DTS, DoxaDent was weakest (P < 0.05) for all testing times except Fuji IX DTS at 1- and 4-week intervals. For VHN, DoxaDent was harder than glass-ionomer, better than composite except at 1 hour and less than amalgam. Except for VHN for Z250, all values improved from 1-24 hours. Based on current in vitro results, this novel restorative material does not yet equal composite or amalgam CS or DTS.
