Effect of repair and surface treatments on the strength of digitally fabricated resin-based dental prostheses: A systematic review of in vitro studies

Mohammed M Gad; Reem Abualsaud

doi:10.1016/j.jdent.2023.104806

Effect of repair and surface treatments on the strength of digitally fabricated resin-based dental prostheses: A systematic review of in vitro studies

J Dent. 2024 Feb:141:104806. doi: 10.1016/j.jdent.2023.104806. Epub 2023 Dec 27.

Authors

Mohammed M Gad¹, Reem Abualsaud²

Affiliations

¹ Lecturer, Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia. Electronic address: mmjad@iau.edu.sa.
² Associate Professor, Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.

PMID: 38154701
DOI: 10.1016/j.jdent.2023.104806

Abstract

Objective: This review investigated the current literature pertaining to the repairability of computer-aided design-computer-aided manufacturing (CAD-CAM) milled and three-dimensional (3D) printed resin-based dental prostheses (RBDPs) as well as the appropriate surface treatment for each repair material that will produce adequate repair bond strength.

Data/sources: PubMed, Web of Science, and Scopus databases were searched for published articles involving repair of CAD-CAM RBDPs between January 2010 and June 2023. Data were collected and analyzed to reveal the surface treatment effects, suggested repair materials, and strength of repaired RBDPs.

Study selection: Out of 164 retrieved titles, 11 studies were included, of which five investigated the repair of 3D-printed RBDPs, three investigated the repair of CAD-CAM milled resins, and three investigated both materials. Additionally, of the included studies, seven investigated denture base resins, three studied provisional restoration resins, and one evaluated 3D-printed intraoral splints. Various surface treatments were suggested, with air-abrasive methods being the most commonly used. Different materials for resin repair were proposed and used, including auto-polymerized, reline, and composite resins. For 3D-printed resins, repair with Bis-acrylic/Bis-GMA composites improved repair strength.

Conclusion: Surface treatments positively affected the repair strength of conventional and milled RBDPs. However, challenges remain relevant to the repair of 3D-printed resins owing to composition mismatches and fabrication techniques. Therefore, further investigation is required to develop new 3D-printed resins.

Clinical significance: CAD-CAM milled resins have satisfactory repair strength, which increases with surface treatment. The repair of 3D-printed resins has proven challenging even with surface treatments. However, composite resins are the materials of choice.

Keywords: 3D-printing; Bond strength; CAD-CAM; Dental prostheses; Repair; Resins; Systematic review.

Publication types

Systematic Review
Review

MeSH terms

Bisphenol A-Glycidyl Methacrylate
Composite Resins*
Computer-Aided Design
Dental Prosthesis*
Materials Testing
Polymethyl Methacrylate
Surface Properties

Substances

Composite Resins
Polymethyl Methacrylate
Bisphenol A-Glycidyl Methacrylate