Accuracy of additively manufactured and milled interim 3-unit fixed dental prostheses

Article Article scientifique Article Accuracy of additively manufactured and milled interim 3-unit fixed dental prostheses eng 2022-03 author Karasan Duygu 0000-0003-4631-2053 931194 author Legaz Barrionuevo Juan Ignacio 907211 author Boitelle Philippe 0000-0002-6657-8724 956788 author Mojon Philippe 26576 author Fehmer Vincent 833517 author Sailer Irena 809246 58-69 10.1111/jopr.13454 34792821 1059-941X PMC9313830 Purpose: To investigate the accuracy of additive manufacturing (AM) by means of internal fit of fixed dental prostheses (FDPs) fabricated with two AM technologies using different resins and printing modes (validated vs nonvalidated) compared to milling and direct manual methods. Material and methods: Sixty 3-unit interim FDPs replacing the first mandibular molar were divided into 6 groups (n = 10): manual (Protemp 4), milled (Telio-CAD), and AM groups were subdivided based on AM technology (direct light processing (Rapidshape P30 [RS]) and stereolithography (FormLabs 2 [FL])) and the polymer type (P-Pro-C&B [St] and SHERAprint-cb [Sh]) (RS-St, RS-Sh, FL-St, FL-Sh). Validated (RS-Sh and RS-St) or nonvalidated (FL-St and FL-Sh) modes were adopted for AM. The specimens were scanned to 3D align (GOM inspect) according to the triple scan method. The internal space between the FDPs and preparation surfaces in four sites (marginal, axial, occlusal, and total) was measured using equidistant surface points (GOM Inspect). Statistical analysis was done using Kruskal Wallis and Dunn post-hoc tests. (α = 0.05). Results: One AM group (FL-Sh) and milling exhibited better adaptation compared to manual and RS-St at molar site (p < 0.05). FDPs with St resin (FL-St and RS-St) displayed bigger marginal space than milled, FL-Sh, and RS-Sh. The nonvalidated printing mode showed better mean space results (p < 0.05) with higher predictability and repeatability (p < 0.001). Conclusions: The AM interim FDPs tested provided valid alternatives to the milled ones in regard to their accuracy results. The printing mode, resin, and the AM technology used significantly influenced the manufacturing accuracy of interim FDPs, particularly at the marginal area. The nonvalidated printing mode with lower-cost 3D printers is a promising solution for clinical applications. 3D printing Additive manufacturing Fixed dental prosthesis Interim restorations Provisional restorations Computer-Aided Design Dental Marginal Adaptation Dental Prosthesis Design / methods Denture, Partial, Temporary Materials Testing Molar Printing, Three-Dimensional Dewey 617.6 210 Division de prothèse fixe et biomatériaux 24Q2 212 Division de gérodontologie et prothèse adjointe 24Q3 false 908 Groupe Sailer Iréna 946 Journal of prosthodontics 31 S1 655ad66c-a009-44a5-88f4-9d2bc856e78d Article (Published version) Public Article-scientifique-from-europePmc.pdf 1319829 application/pdf CC BY openAccess Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de prothèse fixe et biomatériaux Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de gérodontologie et prothèse adjointe

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Accuracy of additively manufactured and milled interim 3-unit fixed dental prostheses	Journal of prosthodontics			2022	184	277

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Boitelle, Philippe