Türp Lisa, Loewe Philipp, Yazigi Christine, Kern Matthias
Assistant Professor, Department of Prosthodontics, Propaedeutics, and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
Assistant Professor, Department of Prosthodontics, Propaedeutics, and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
J Prosthet Dent. 2025 Apr;133(4):1054.e1-1054.e7. doi: 10.1016/j.prosdent.2025.01.002. Epub 2025 Jan 30.
Minimally invasive restorations adhesively bonded to prepared enamel have been well established clinically. However, studies on the durability of noninvasive restorations are still lacking.
The purpose of this laboratory study was to evaluate the tensile bond strength (TBS) of a luting resin and its durability to differently pretreated enamel with 2 different etching procedures.
The proximal surfaces of human third molar teeth were embedded in custom-made holders with an autopolymerizing composite resin. The enamel was pretreated according to the protocol of the respective group (n=16): Minimally invasively prepared (M), unprepared (N), and airborne-particle abraded (O); enamel was either etched with phosphoric acid followed by applying a self-etching primer (PT) or conditioned with a self-etching primer only (T). The bonding surfaces of the specimens were perpendicularly luted to acrylic resin tubes filled with a composite resin (Clearfil F II) with a luting resin (Panavia V5). Each of the 6 groups was further divided into 2 subgroups with either 3-days of water storage at 37 °C or 150 days of water storage with additional thermal cycling (37 500 thermal cycles between 5 °C and 55 °C). TBS was evaluated with a universal testing machine. All specimens underwent failure mode analysis. Statistical analysis was performed with a 3-way ANOVA, followed by 2-way ANOVAs and separate 1-way ANOVAs. For pairwise comparisons of groups, the Tukey post hoc test was performed (α=.05 for all tests).
Statistical analysis revealed that the enamel preparation had no significant effect on TBS after artificial aging when etched with phosphoric acid (P=.520). Conditioning with a self-etching primer only showed significantly lower TBS than groups etched with phosphoric acid for the same preparation after 150 days (P=.014 for minimal preparation, P=.028 for no preparation, and P<.001 for airborne-particle abrasion), and artificial aging did not significantly affect TBS (P=.763). The mean ±standard deviation values ranged from 9.8 ±8.1 MPa (OT) to 36.4 ±7.4 MPa (MPT) after 150-day storage.
Etching of enamel is essential for optimal resin bonding, but the preparation of enamel or artificial aging had no influence on TBS.
临床上，微创修复体通过粘结剂粘结到预备好的牙釉质上已得到充分证实。然而，关于非侵入性修复体耐久性的研究仍然不足。
本实验室研究的目的是评估一种粘结树脂的拉伸粘结强度（TBS）及其在两种不同蚀刻程序下对不同预处理牙釉质的耐久性。
将人类第三磨牙的近中面用自凝复合树脂嵌入定制的固定器中。根据各实验组方案（n = 16）对牙釉质进行预处理：微创预备（M）、未预备（N）和空气颗粒研磨（O）；牙釉质要么先用磷酸蚀刻，然后涂覆自酸蚀底漆（PT），要么仅用自酸蚀底漆处理（T）。将标本的粘结面垂直粘结到填充有复合树脂（Clearfil F II）的丙烯酸树脂管上，使用粘结树脂（Panavia V5）。6个实验组中的每一组又进一步分为两个亚组，分别在37℃下储存3天或在5℃至55℃之间进行150天的水储存并附加热循环（37500次热循环）。用万能试验机评估TBS。对所有标本进行失效模式分析。采用三因素方差分析进行统计分析，随后进行双因素方差分析和单独的单因素方差分析。对于组间的两两比较，采用Tukey事后检验（所有检验α = 0.05）。
统计分析表明，人工老化后，用磷酸蚀刻时，牙釉质预备对TBS无显著影响（P = 0.520）。仅用自酸蚀底漆处理显示，在150天后，对于相同的预备情况，其TBS显著低于用磷酸蚀刻的组（微创预备时P = 0.014，未预备时P = 0.028，空气颗粒研磨时P < 0.001），并且人工老化对TBS无显著影响（P = 0.763）。150天储存后，平均值±标准差范围从（OT组）9.8±8.1MPa到（MPT组）36.4±7.4MPa。
蚀刻牙釉质对于实现最佳树脂粘结至关重要，但牙釉质预备或人工老化对TBS没有影响。
