Al-Dwairi Ziad N, Al Haj Ebrahim Abdulkareem A, Baba Nadim Z
Department of Prosthodontics, Faculty of Dentistry, Jordan University of Science and Technology (JUST), Irbid, Jordan.
Advanced Specialty Education Program in Prosthodontics, Loma Linda University, School of Dentistry, CA.
J Prosthodont. 2023 Jan;32(1):40-48. doi: 10.1111/jopr.13491. Epub 2022 Feb 25.
To study the surface and mechanical properties of 3D printed denture-base resin materials and compare them with conventional heat-cured polymethylmethacrylate (PMMA).
Three brands of 3D printed denture-base resin materials and one conventional heat-cured PMMA were tested in this study: NextDent 3D printed resin, Dentona 3D printed resin, ASIGA 3D printed resin, and Meliodent conventional PMMA. Sixty specimens (25 × 25 × 3 mm) were fabricated (n=15 per group) to perform the following tests: wettability, surface roughness, and microhardness. One hundred twenty specimens (65 × 10 × 3 mm) were fabricated (n=30 per group) and stored in distilled water at (37 ±1°C) for 7 days. Specimens (N = 15) in each group were subjected to the three-point bending test and impact strength test, employing the Charpy configuration on un-notched specimens. The morphology of the fractured specimens was studied under scanning electron microscope (SEM). Statistical analysis was performed using one-way ANOVA and Tukey-pairwise multiple comparisons with 95% confidence interval. P-values of ≤0.05 were considered significant.
The conventional heat-cured specimens demonstrated the highest means of surface roughness (0.23 ± 0.07 μm), Vickers hardness number (18.11 ±0.65) and flexural strength (92.44 ±7.91 MPa), and the lowest mean of contact angle (66.71° ±3.38°). ASIGA group showed the highest mean of contact angle (73.44° ±2.74°) and the lowest mean of surface roughness (0.19 ±0.03 μm). The highest mean of impact strength was recorded in the Dentona group (17.98 ±1.76 kg/m ). NextDent specimens showed the lowest means of Vickers hardness number (16.20 ±0.93), flexural strength (74.89 ±8.44 MPa), impact strength (15.20 ±0.69 kg/m ), and recorded the highest mean of bending modulus (2,115.80 ±178.95 MPa).
3D printed resin exhibited noticeable differences in surface and mechanical properties between different brands and with conventional heat-polymerized PMMA.
研究3D打印义齿基托树脂材料的表面和力学性能，并与传统热固化聚甲基丙烯酸甲酯（PMMA）进行比较。
本研究测试了三个品牌的3D打印义齿基托树脂材料和一种传统热固化PMMA：NextDent 3D打印树脂、Dentona 3D打印树脂、ASIGA 3D打印树脂和Meliodent传统PMMA。制备了60个试样（25×25×3mm）（每组n = 15）进行以下测试：润湿性、表面粗糙度和显微硬度。制备了120个试样（65×10×3mm）（每组n = 30），并在（37±1°C）的蒸馏水中储存7天。每组中的试样（N = 15）进行三点弯曲试验和冲击强度试验，采用夏比冲击试验配置对无缺口试样进行测试。在扫描电子显微镜（SEM）下研究断裂试样的形态。使用单因素方差分析和Tukey两两多重比较进行统计分析，置信区间为95%。P值≤0.05被认为具有统计学意义。
传统热固化试样的表面粗糙度均值最高（0.23±0.07μm）、维氏硬度值（18.11±0.65）和弯曲强度（92.44±7.91MPa），接触角均值最低（66.71°±3.38°）。ASIGA组的接触角均值最高（73.44°±2.74°），表面粗糙度均值最低（0.19±0.03μm）。Dentona组的冲击强度均值最高（17.98±1.76kg/m）。NextDent试样的维氏硬度值均值最低（16.20±0.93）、弯曲强度（74.89±8.44MPa）、冲击强度（15.20±0.69kg/m），弯曲模量均值最高（2115.80±178.95MPa）。
不同品牌的3D打印树脂与传统热聚合PMMA相比，在表面和力学性能方面存在显著差异。
