Physical, Mechanical, and Anti‐Biofilm Formation Properties of CAD‐CAM Milled or 3D Printed Denture Base Resins: In Vitro Analysis

• Published in: Journal of prosthodontics Vol. 32; no. S1; pp. 38 - 44
• Main Authors: Freitas, Rodrigo Falcão Carvalho Porto de, Duarte, Simone, Feitosa, Sabrina, Dutra, Vinicius, Lin, Wei‐Shao, Panariello, Beatriz Helena Dias, Carreiro, Adriana da Fonte Porto
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.04.2023
• Subjects: 3D printing; additive manufacturing; Adhesives; Biofilms; complete dentures; Computer-Aided Design; computer‐aided manufacturing; Contact angle; Denture Bases; Dentures; digital dentures; Materials Testing; Mechanical properties; photocurable resin; Polymethyl Methacrylate; Polymethylmethacrylate; Printing, Three-Dimensional; Resins; Statistical analysis; subtractive manufacturing; Surface Properties; additive manufacturing; digital dentures; subtractive manufacturing; photocurable resin; computer-aided design; complete dentures; 3D printing; computer-aided manufacturing
• ISSN: 1059-941X; 1532-849X; 1532-849X
• DOI: 10.1111/jopr.13554

Purpose To investigate surface characteristics (roughness and contact angle), anti‐biofilm formation, and mechanical properties (mini‐flexural strength) of computer‐aided design and computer‐aided manufacturing (CAD‐CAM) polymethylmethacrylate (PMMA) polymer, and three‐dimensional (3D) printed resin for denture base fabrication compared with conventional heat polymerized denture base resins. Materials and methods A total of 60 discs and 40 rectangular specimens were fabricated from one CAD‐CAM (AvaDent), one 3D printed (Cosmos Denture), and two conventional heat polymerized (Lucitone 199 and VipiWave) materials for denture base fabrication. Roughness was determined by Ra value; the contact angle was measured by the sessile drop method. The biofilm formation inhibition behavior was analyzed through Candida albicans adhesion, while mini‐flexural strength test was done using a three‐point bending test. The data were analyzed using descriptive and analytical statistics (α = 0.05). Results The CAD‐CAM PMMA group showed the lowest C. albicans adhesion (log CFU/mL: 3.74 ± 0.57) and highest mini‐flexural strength mean (114.96 ± 16.23 MPa). 3D printed specimens presented the highest surface roughness (Ra: 0.317 ± 0.151 μm) and lowest mini‐flexural strength values (57.23 ± 9.07 MPa). However, there was no statistical difference between CAD‐CAM PMMA and conventional groups for roughness, contact angle, and mini‐flexural strength. Conclusions CAD‐CAM milled materials present surface and mechanical properties similar to conventional resins and show improved behavior in preventing C. albicans adhesion. Nevertheless, 3D printed resins present decreased mini‐flexural strength.