Factors affecting accuracy in the additive manufacturing of interim dental prostheses: A systematic review.

STATEMENT OF PROBLEM A systematic review of the effect of different factors on the accuracy of additively manufactured (AM) interim dental prostheses is lacking. PURPOSE The purpose of this systematic review was to identify potential factors that may affect the accuracy of AM interim dental prostheses. MATERIAL AND METHODS The review adhered to the guidelines outlined in the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement. The protocol was registered in the international prospective database of systematic reviews (PROSPERO) (CRD42024521564). The risk of bias in the included studies was assessed by using the Joanna Briggs Institute (JBI) checklist. Two reviewers performed an electronic search on the Web of Science, Scopus, PubMed, and Embase databases for articles published up to the end of 2023. RESULTS The electronic search resulted in 406 studies. After removing duplicates, 205 studies remained. Thirty-one studies (30 in vitro and 1 in vivo) were included and categorized into 6 types: AM material (type and composition), prosthetic factor (tooth type, restoration size, finish line, abutment taper), AM system (technique and printer), AM parameters (layer thickness, printing orientation), postprocessing (rinsing, postpolymerization), and aging. CONCLUSIONS The accuracy of AM interim dental prostheses is affected by factors that include the AM material, prosthetic factors, the AM system, the AM parameters, postprocessing, and aging.