Policlinic of Prosthetic Dentistry and Material Science, Centre for Dental Medicine, Jena University Hospital, Jena, D-07743, Germany.
Department of Oral and Maxillofacial Surgery, University of Tennessee Medical Center, Knoxville, TN.
J Prosthodont. 2021 Oct;30(8):711-719. doi: 10.1111/jopr.13303. Epub 2021 Jan 8.
To measure surface roughness before and after wear-tests of two different prefabricated composite veneers and compare them to ceramic veneers and human dental enamel.
Roughness (Ra-values) of two prefabricated composite veneers (Visalys Veneer Chairside (VIS) and Componeer (COM)) were compared to lithium disilicate Veneers (e.max CAD) and dental enamel (DENT) in vitro. In total n = 45 specimens per material and enamel samples were used for wear-tests. Wear-out tests were conducted by abrasion tests with a toothbrush simulator (22,000 strokes/ 100 g load; approximately equal to two years of cleansing) and erosion tests were carried out using citric acid (pH 1.57). Ra- and Sa-values were detected by white light interferometer before and after wear-tests. Data were analyzed with ANOVA followed by Games-Howell post hoc test and t-test (α = 0.05).
At baseline the lowest Ra- and Sa-values were found in VIS (Ra: 0.01 µm; Sa: 0.04 µm) while DENT revealed significantly higher surface roughness (Ra: 0.11 µm, p < 0.05; Sa: 0.30, p = 0.186). COM had significantly higher Ra-values (Ra: 0.10 µm; Sa: 0.22 µm) after abrasion, while e.max CAD was most resistant to the treatments (Ra: 0.01 µm, p < 0.05; Sa: 0.05 µm, p < 0.05). Compared to DENT all veneers were significantly less affected by citric acid (p < 0.001).
Prefabricated composite veneers have demonstrated less wear after abrasion and erosion tests compared to DENT, nevertheless, they revealed more wear compared to e.max CAD.
测量两种不同预制复合贴面在磨损试验前后的表面粗糙度，并将其与陶瓷贴面和人牙釉质进行比较。
体外比较了两种预制复合贴面（Visalys Veneer Chairside (VIS) 和 Componeer (COM)）与锂硅二酸盐贴面（e.max CAD）和牙釉质（DENT）的粗糙度（Ra 值）。共使用 n = 45 个每个材料和牙釉质样本进行磨损试验。磨损试验通过牙刷模拟器进行磨损试验（22,000 次/ 100 克负载；约等于两年的清洁）和使用柠檬酸（pH 1.57）进行的侵蚀试验进行。在磨损试验前后，使用白光干涉仪检测 Ra 和 Sa 值。使用方差分析（ANOVA） followed by Games-Howell 事后检验和 t 检验（α = 0.05）分析数据。
在基线时，VIS 的 Ra 和 Sa 值最低（Ra：0.01 µm；Sa：0.04 µm），而 DENT 的表面粗糙度显著更高（Ra：0.11 µm，p < 0.05；Sa：0.30，p = 0.186）。COM 在磨损后具有显著更高的 Ra 值（Ra：0.10 µm；Sa：0.22 µm），而 e.max CAD 对处理的抵抗力最强（Ra：0.01 µm，p < 0.05；Sa：0.05 µm，p < 0.05）。与 DENT 相比，所有贴面受柠檬酸的影响均显著较小（p < 0.001）。
与 DENT 相比，预制复合贴面在磨损和侵蚀试验后的磨损程度较小，但与 e.max CAD 相比，其磨损程度更大。
