Center of Oral Implantology, Stomatological Hospital, Southern Medical University, South Jiangnan Road No. 366, Guangzhou 510280, China; Section Medical Materials Science and Technology, Tübingen University Hospital, Osianderstr. 2-8, Tübingen 72076, Germany.
Department of Prosthodontics at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tübingen University Hospital, Osianderstr. 2-8, Tübingen 72076, Germany.
J Dent. 2022 Jan;116:103889. doi: 10.1016/j.jdent.2021.103889. Epub 2021 Nov 17.
To investigate the influence of additive manufacturing method and build angle on surface characteristics and Candida albicans (C. albicans) adhesion to 3D printed denture base polymers.
Specimens of 3D printing denture base polymers were prepared by two printers, namely, stereolithography (SLA, Form 3B) and digital light processing technology (DLP, Solflex 350 plus). Three build angles were used: 0°, 45°, and 90°. Surface topography was examined by scanning electron microscopy. Also, arithmetical mean height (S) values were calculated. An adhesion test was performed to observe initial C. albicans adhesion to the specimens. The data were statistically analyzed using the two-way analysis of variance and Tukey's multiple comparison test.
The data of S values had statistically significant differences, which were mainly determined by the main factor of build angle (p < 0.05). Moreover, the quantitative results of C. albicans adhesion exhibited no significant differences: printing techniques (p = 0.7794) and build angle (p = 0.0589), respectively.
Surface roughness was significantly influenced by the build angle rather than by the AM method. Whereas, AM method (SLA and DLP) and build angle (0°, 45°, and 90º) had no impacts on the C. albicans adhesion to the 3D printed denture bases.
Build angle dominates the surface roughness and topography of the 3D printed denture polymers. Our results indicate that C. albicans' adhesion might not be influenced by AM method and build angle.
研究增材制造方法和构建角度对 3D 打印义齿基托聚合物表面特性和白色念珠菌（C. albicans）黏附的影响。
使用两种打印机（立体光固化技术（SLA，Form 3B）和数字光处理技术（DLP，Solflex 350 plus））制备 3D 打印义齿基托聚合物样本。使用三个构建角度：0°、45°和 90°。通过扫描电子显微镜检查表面形貌。同时，计算算术平均高度（S）值。进行黏附试验以观察初始 C. albicans 对标本的黏附。使用双向方差分析和 Tukey 多重比较检验对数据进行统计分析。
S 值数据具有统计学显著差异，主要由构建角度的主因素决定（p<0.05）。此外，C. albicans 黏附的定量结果无显著差异：打印技术（p=0.7794）和构建角度（p=0.0589）。
表面粗糙度主要受构建角度的影响，而不是增材制造方法。然而，增材制造方法（SLA 和 DLP）和构建角度（0°、45°和 90°）对 3D 打印义齿基托的 C. albicans 黏附没有影响。
构建角度主导 3D 打印义齿聚合物的表面粗糙度和形貌。我们的结果表明，C. albicans 的黏附可能不受增材制造方法和构建角度的影响。
