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Physicomechanical properties of 3D printed resins for producing definitive dental crowns
Maribí Isomar Terán Lozada1, Airin Karelys Avendaño Rondón1, Izabela Batista Cordeiro2
1Postgraduate student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
Statement Of Problem:
Additive manufacturing has gained in popularity for producing definitive dental prostheses. Variations in 3 dimensionally (3D) printed resin composites polymerized using different light technologies may impact their physicomechanical properties.
Purpose:
The purpose of this in vitro study was to evaluate the physicomechanical properties of 3D printed resins indicated for definitive dental crowns using different printing systems.
Material And Methods:
Four commercially available A2 shade 3D printed resins (Ceramic Crown; SprintRay, OnX Tough 2; SprintRay, Sculpture 2.0; Rodin, and Voxelprint; FGM) were processed using masked stereolithography (MSLA) or digital light processing (DLP) printer technologies according to the manufacturer's recommendations. Flexural strength (FS, MPa), elastic modulus (E, GPa), compressive strength (CS, MPa), ultimate tensile strength (UTS, MPa), Vickers microhardness (VHN, N/mm2), surface roughness (Ra, μm), water sorption (WS, %), and degree of conversion (DC, %) were measured. Scanning electron microscopy was used for topography analysis. Data were analyzed using 1-way ANOVA and the Tukey HSD test (α=.05).
Results:
Significant differences were found for FS, E, CS, UTS, VHN, Ra, WS, and DC values (P<.001). Voxelprint and Ceramic Crown showed, in general, better physicomechanical performances. OnX Tough 2, despite its high degree of conversion, showed significantly lower properties. Sculpture 2.0 had irregular topography and the highest Ra values.
Conclusions:
The physicomechanical properties of the 3D printed resin were significantly affected by the material composition printing technology, and postpolymerization protocol. The Voxelprint, Ceramic Crown, and Sculpture 2.0 showed physicomechanical properties that supported their indication for definitive dental crowns.
