Wear Resistance of 3D Printed and Prefabricated Denture Teeth Opposing Zirconia

Abstract

Purpose To evaluate the wear resistance of a recently developed three‐dimensional (3D) printed denture teeth resin compared to three commercially available prefabricated denture teeth. Materials and Methods A total of 88 maxillary first molar denture teeth were evaluated: C (Classic; Dentsply Sirona, York, PA), DCL (SR Postaris DCL; Ivoclar Vivadent, Schaan, Liechtenstein), IPN (Portrait IPN; Dentsply Sirona, York, PA), and F (Denture Teeth A2 Resin 1 L; Formlabs, Somerville, MA). The 3D printed denture tooth specimens were fabricated from a methacrylate‐based photopolymerizing resin using stereolithography (SLA). Denture teeth were subjected to a three‐body wear test with a poly(methylmethacrylate) (PMMA) abrasive slurry. A Leinfelder‐style four station wear apparatus with custom bullet‐shaped milled zirconia styli was utilized with a load force of 36–40 N at 1.7 Hz for 200,000 cycles. Maximum depth of wear was measured using a lab grade scanner and analyzing software program. Data were analyzed using a one‐way ANOVA followed by the Tukey's Multiple Comparisons post hoc test (α = 0.05). Results A statistically significant difference in depth of wear was found between denture tooth materials (p < 0.001). The mean vertical depth of wear for the 3D printed denture teeth (0.016 ± 0.010 mm) was statistically significantly less than the prefabricated denture teeth. The highly cross‐linked denture teeth, DCL (0.036 ± 0.011 mm) and IPN (0.035 ± 0.014 mm), exhibited statistically significantly less wear than the conventional acrylic denture teeth. The conventional acrylic denture teeth demonstrated the greatest wear (0.058 ± 0.014 mm). No significant difference in depth of wear was found between DCL and IPN (p > 0.001). Conclusions Denture tooth material significantly influences the depth of wear. The 3D printed denture teeth demonstrated superior wear resistance compared to the commercially available prefabricated denture teeth when opposed to zirconia. Denture teeth fabricated with SLA technology may have a promising future in prosthetic dentistry.

Strength and Wear Behavior of Three-Dimensional Printed and Prefabricated Denture Teeth: An In Vitro Comparative Analysis

“…24 32 It was reported that printed object with SLA technology showed advantages, good mechanical resistance compared with DLP printed object. 33 34 In a previous study done by Pham et al 23 have investigated the abrasion resistance of 3D-printed denture teeth (FormLabs Resin) in comparison with conventional prefabricated denture teeth and stated that 3D-printed resin exhibited superior abrasion resistance in similarity with findings of the current study. SEM findings proved strength of FormLabs resin; based on SEM finding, FormLabs resin showed less distractive characteristics (crushed, cracks, voids, and microbubbles).…”

“…27 27 It was reported that prefabricated teeth exhibited high wear resistance in comparison 3D-printed resin. 10 The prefabricated teeth were processed under high pressure with different polymerization method and consist of multiple layers with different chemical and physical properties, 23 in addition to the glossy enamel mimic coating layer increasing the wear resistance of prefabricated one as this layer was missing in 3D-printed resins. 10 In this study, 3D-printed resins were comparable to prefabricated teeth; however, the FormLab showed the highest wear resistance (lowest volume loss) value when compared with other groups.…”

Wear of 3D printed and CAD/CAM milled interim resin materials after chewing simulation

“…Another recent study reported that 3D printed PMMA denture teeth exhibited a statistically lower depth of wear compared to the prefabricated PMMA resin denture teeth after 200,000 cycles of simulated chewing. 22 Based on the results of these previous studies 9 22 and our study, 3D printed resin materials are considered to have equivalent or superior wear resistance compared to the conventional PMMA materials. 9 22 …”

Current Status of Digital Complete Dentures Technology

“…Although in laboratory studies the wear resistance of the 3D-printed artificial teeth seem to be at least adequate for denture use, long duration randomized clinical trials are necessary for in depth evaluation of this aspect as well [63,64]. Regarding other mechanical properties, CDs produced with the subtractive method have been found to be superior in toughness and surface roughness than the 3D-printed ones [65].…”