Division of Paediatric Dentistry, Department of Orthodontics and Paediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Eur Arch Paediatr Dent. 2024 Oct;25(5):677-684. doi: 10.1007/s40368-024-00926-2. Epub 2024 Jul 24.
This study aimed to evaluate the effects of two surface treatments on the tensile bond strength of prefabricated zirconia crowns (PZCs) using bioactive and resin cements.
Forty extracted human primary maxillary incisors were prepared and divided into four groups based on surface treatment and cement type: (1) sandblast with bioactive cement, (2) sandblast with resin cement, (3) 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) with bioactive cement, and (4) 10-MDP with resin cement. After 24 h of cementation, specimens underwent 5000 thermocycling cycles between 5 °C and 55 °C. Tensile bond strengths were measured using a universal testing machine. The data were analyzed using two-way ANOVA and Tukey's post hoc test, with significance set at p < 0.05.
The mean tensile bond strengths observed were 2.25 ± 1.27 MPa for sandblast with bioactive cement, 1.39 ± 0.95 MPa for sandblast with resin cement, 2.45 ± 1.15 MPa for 10-MDP with bioactive cement, and 1.68 ± 1.03 MPa for 10-MDP with resin cement. Significant improvements in bond strength were observed in the bioactive cement group treated with 10-MDP compared to those treated with sandblasting (p < 0.05). The 10-MDP treatment did not enhance bond strength for the resin cement compared to sandblasting.
Bioactive cement generally provides a higher tensile bond strength than resin cement. While 10-MDP treatment enhances bond strength when used with bioactive cement, it does not show a similar enhancement when used with resin cement compared to sandblasting, indicating its effectiveness is selective based on the type of cement used.
本研究旨在评估两种表面处理方法对使用生物活性和树脂水门汀黏结预制氧化锆全冠（PZCs）的拉伸黏结强度的影响。
将 40 颗离体上颌中切牙进行预备，并根据表面处理和水门汀类型分为四组：（1）喷砂+生物活性水门汀，（2）喷砂+树脂水门汀，（3）10-甲基丙烯酰氧癸基二氢磷酸酯（10-MDP）+生物活性水门汀，（4）10-MDP+树脂水门汀。黏结 24 小时后，试件在 5°C 和 55°C 之间进行 5000 次热循环。使用万能试验机测量拉伸黏结强度。采用双因素方差分析和 Tukey 事后检验进行数据分析，p 值<0.05 为差异有统计学意义。
观察到的平均拉伸黏结强度分别为喷砂+生物活性水门汀组 2.25±1.27 MPa，喷砂+树脂水门汀组 1.39±0.95 MPa，10-MDP+生物活性水门汀组 2.45±1.15 MPa，10-MDP+树脂水门汀组 1.68±1.03 MPa。与喷砂处理相比，用 10-MDP 处理的生物活性水泥组的黏结强度显著提高（p<0.05）。与喷砂处理相比，10-MDP 处理对树脂水泥的黏结强度没有提高。
生物活性水泥通常比树脂水泥提供更高的拉伸黏结强度。虽然 10-MDP 处理与生物活性水泥联合使用时可以提高黏结强度，但与喷砂处理相比，与树脂水泥联合使用时并未显示出类似的增强效果，这表明其有效性是基于所用水泥类型的选择性。
