Kamonkhantikul Krid, Arksornnukit Mansuang, Lauvahutanon Sasipin, Takahashi Hidekazu
Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University.
Dent Mater J. 2016;35(2):225-32. doi: 10.4012/dmj.2015-228.
This study investigated the surface roughness and gloss of composite resin CAD/CAM blocks after toothbrushing. Five composite resin blocks (Block HC, Cerasmart, Gradia Block, KZR-CAD Hybrid Resin Block, and Lava Ultimate), one hybrid ceramic (Vita Enamic), one feldspar ceramic (Vitablocs Mark II), one PMMA block (Telio CAD), and one conventional composite resin (Filtek Z350 XT) were evaluated. Surface roughness (Ra) and gloss were determined for each group of materials (n=6) after silicon carbide paper (P4000) grinding, 10k, 20k, and 40k toothbrushing cycles. One-way repeated measures ANOVA indicated significant differences in the Ra and gloss of each material except for the Ra of GRA. After 40k toothbrushing cycles, the Ra of BLO and TEL showed significant increases, while CER, KZR, ULT, and Z350 showed significant decreases. GRA, ENA, and VIT maintained their Ra. All of the materials tested, except CER, demonstrated significant decreases in gloss after 40k toothbrushing cycles.
本研究调查了复合树脂CAD/CAM块在刷牙后的表面粗糙度和光泽度。评估了五种复合树脂块（Block HC、Cerasmart、Gradia Block、KZR-CAD混合树脂块和Lava Ultimate）、一种混合陶瓷（Vita Enamic）、一种长石陶瓷（Vitablocs Mark II）、一个聚甲基丙烯酸甲酯块（Telio CAD）和一种传统复合树脂（Filtek Z350 XT）。在使用碳化硅砂纸（P4000）打磨后，以及经过10k、20k和40k次刷牙循环后，测定每组材料（n = 6）的表面粗糙度（Ra）和光泽度。单向重复测量方差分析表明，除了Gradia Block（GRA）的Ra外，每种材料的Ra和光泽度均存在显著差异。在经过40k次刷牙循环后，Block HC（BLO）和Telio CAD（TEL）的Ra显著增加，而Cerasmart（CER）、KZR-CAD混合树脂块（KZR）、Lava Ultimate（ULT）和Filtek Z350 XT（Z350）的Ra显著降低。Gradia Block（GRA）、Vita Enamic（ENA）和Vitablocs Mark II（VIT）的Ra保持不变。在经过40k次刷牙循环后，除了Cerasmart（CER）外，所有测试材料的光泽度均显著降低。
