Assistant Professor, Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa.
Associate Professor of Restorative Dentistry, Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa.
J Prosthet Dent. 2021 Nov;126(5):698-702. doi: 10.1016/j.prosdent.2020.08.016. Epub 2020 Oct 27.
Optimal composite resin bonds to polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) materials are essential for clinical success. However, comparative bond strength studies on the influence of different etching and cleaning methods on these materials are lacking.
The purpose of this in vitro study was to measure and compare the microshear bond strength (μSBS) of a composite resin cement with that of a PICN material after different surface treatment and cleaning methods.
Seventy specimens of a CAD-CAM PICN were divided into 7 groups (n=10): no treatment (control), hydrofluoric acid etching for 20 seconds (HF20), 60 seconds (HF60), 120 seconds (HF120), HF20 + phosphoric acid for 60 seconds and ultrasonic bath for 5 minutes, HF60 + PH, and HF120 + PH. After surface treatment, a silane coupling agent and composite resin cement were applied. Microshear bond strength was determined, and data were analyzed with 1-way ANOVA and Tukey post hoc multiple comparison tests (α=.05).
All HF acid treatments resulted in a significant increase in bond strength to the polymer-infiltrated ceramic network material (P=.02). Bond strength values for HF etching for 20 seconds were significantly lower than those for 60 seconds and 120 seconds (P=.034). No difference was found between 60 seconds and 120 seconds of HF etching time (P=.986). Additional surface treatment with phosphoric acid 60 seconds and ultrasonic bath 5 minutes did not improve the bond strength beyond values obtained by hydrofluoric acid treatment only (P=.834). Most failures were cohesive.
Acid etching and surface treatment have significant effects on composite resin bond strength to a PICN CAD-CAM material. HF etching for 60 seconds or 120 seconds provides the highest bond strengths. Cleaning methods after etching did not have any significant effect on bond strength.
最佳复合树脂与聚合物渗透陶瓷网络（PICN）计算机辅助设计和计算机辅助制造（CAD-CAM）材料的结合对于临床成功至关重要。然而，关于不同蚀刻和清洁方法对这些材料影响的比较粘结强度研究还很缺乏。
本体外研究的目的是测量和比较复合树脂水泥与不同表面处理和清洁方法后 PICN 材料的微剪切粘结强度（μSBS）。
将 70 个 CAD-CAM PICN 样本分为 7 组（n=10）：不处理（对照）、氢氟酸蚀刻 20 秒（HF20）、60 秒（HF60）、120 秒（HF120）、HF20+磷酸 60 秒和超声浴 5 分钟、HF60+PH 和 HF120+PH。表面处理后，应用硅烷偶联剂和复合树脂水泥。确定微剪切粘结强度，并使用单向方差分析和 Tukey 事后多重比较检验（α=.05）进行数据分析。
所有 HF 酸处理均导致与聚合物渗透陶瓷网络材料的粘结强度显著增加（P=.02）。HF 蚀刻 20 秒的粘结强度值明显低于 60 秒和 120 秒（P=.034）。HF 蚀刻 60 秒和 120 秒之间的粘结强度无差异（P=.986）。磷酸处理 60 秒和超声浴 5 分钟的额外表面处理并没有提高粘结强度超过 HF 处理获得的值（P=.834）。大多数失效为内聚性失效。
酸蚀刻和表面处理对复合树脂与 PICN CAD-CAM 材料的粘结强度有显著影响。HF 蚀刻 60 秒或 120 秒可提供最高的粘结强度。蚀刻后的清洁方法对粘结强度没有任何显著影响。
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