Tuncel İlkin, Turp Işıl
Department of Prosthodontics, University of Bezmialem, Faculty of Dentistry, İstanbul, Turkey.
Eur Oral Res. 2018 Sep;52(3):122-126. doi: 10.26650/eor.2018.440. Epub 2018 Sep 1.
Debonding is expected as a frequent failure type in zirconia restorations. Therefore the aim of the current study is to evaluate the shear bond strength between colored zirconia and resin cement.
There were 11 groups evaluated each containing 12 zirconia discs (15 mm x 12 mm x 1.6 mm). Groups were colored with the colors A3, B1, C4, D2, and D4 of the VITA classical shade scale. Coloring procedure was carried out for either 3 second or 60 seconds for the study groups and the control group was left untreated. Specimens were then bonded to translucent resin cement having a thickness of 3 mm and width of 3 mm. The shear bond strength of the samples was measured in a universal testing machine with a crosshead speed of 1 mm per minute. Two-way analysis of variance and Tukey's HSD test were used for pairwise comparisons. Also paired t-test was used for comparing groups with the same color but having different shading times.
Any significant difference was not found between the shear bond strengths of samples depending on whether color or shading times. Among the groups, B1 (60 seconds of coloring) had the highest bond strength (10.05 MPa), while A3 (60 seconds of coloring) showed the lowest bond strength (6.72 MPa). However, these differences were not statistically significant.
Coloring zirconia did not affect the shear bond strength between zirconia and resin cement.
脱粘被认为是氧化锆修复体中常见的失败类型。因此，本研究的目的是评估彩色氧化锆与树脂水门汀之间的剪切粘结强度。
共评估11组，每组包含12个氧化锆圆盘（15毫米×12毫米×1.6毫米）。使用VITA经典比色板的A3、B1、C4、D2和D4颜色对各组进行染色。研究组的染色过程分别进行3秒或60秒，对照组不进行处理。然后将样本粘结到厚度为3毫米、宽度为3毫米的半透明树脂水门汀上。在万能试验机上以每分钟1毫米的十字头速度测量样本的剪切粘结强度。采用双向方差分析和Tukey's HSD检验进行两两比较。还使用配对t检验比较相同颜色但染色时间不同的组。
样本的剪切粘结强度在颜色或染色时间方面均未发现显著差异。在各组中，B1（染色60秒）的粘结强度最高（10.05兆帕），而A3（染色60秒）的粘结强度最低（6.72兆帕）。然而，这些差异无统计学意义。
对氧化锆进行染色不会影响氧化锆与树脂水门汀之间的剪切粘结强度。
