Mechanical Performance of 3D-Printed Resins versus CAD/CAM PMMA for Provisional Crowns: New Evidence under Simulated Clinical Conditions

Zarate-Maquera A.D.; Sánchez-Tito M.; Tozo-Burgos J.G. · Journal of Clinical and Experimental Dentistry (2025) · DOI: 10.4317/jced.63128

Resumen

Background: Provisional restorations play a fundamental role in fixed prosthodontic rehabilitation. While current evidence has identified CAD/CAM-fabricated materials as the preferred option due to their excellent mechanical properties, 3D-printed resins have shown significant improvements in their performance in recent years. Therefo re, the aim of the present study was to re-evaluate the fracture resistance of provisional crowns fabricated using 3D-printed resin and CAD/CAM-milled PMMA, considering the influence of artificial aging. Material and Methods: An in vitro study was conducted on 60 provisional crowns divided into four groups accor ding to material type (3D-printed resin or CAD/CAM PMMA) and aging condition; thermocycling and simulated brushing were applied, fracture resistance was tested using a universal testing machine, and data were analyzed using the Student’s t-test at a 5% significance level. Results: After artificial aging, 3D-printed restorations showed significantly higher fracture resistance than CAD CAM milled crowns (p = 0.0064). However, no statistically significant differences were observed between the two fabrication methods under non-aged conditions (p?> 0.05). All groups exceeded the minimum values considered clinically acceptable. Conclusions: 3D printing demonstrated superior mechanical stability after artificial aging, supporting its clinical viability as an efficient, predictable, and favorable option for provisional restorations in oral rehabilitation. © Medicina Oral S. L. C.I.F. B 96689336 - eISSN: 1989-5488

Instituciones: Universidad Privada de Tacna