Tepedino Michele, Iancu Potrubacz Maciej, Arrizza Lorenzo, Russo Manuela, Cavarra Francesco, Cordaro Massimo, Chimenti Claudio
Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, Viale S. Salvatore Edificio Delta 6, 67100 L'Aquila, Italy.
Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma-Università Cattolica del Sacro Cuore, Istituto di Clinica Odontoiatrica e Chirurgia Maxillo-facciale, Largo Agostino Gemelli, 00168 Rome, Italy.
Dent J (Basel). 2020 Sep 30;8(4):108. doi: 10.3390/dj8040108.
The purpose of this study was to evaluate the shear bond strength and adhesive remnant index ARI) of orthodontic brackets following enamel conditioning with acid etching, hydroabrasion, and with both procedures. Thirty extracted human premolars were divided into three groups and received either acid etching, hydroabrasion or both procedures. Orthodontic brackets were bonded with composite resin. Shear bond strength was tested with a tensile machine, then the teeth were observed under a stereomicroscope to evaluate ARI scores. The enamel morphology after each conditioning method was evaluated with scanning electron microscope imaging. A one-way ANOVA and a Kruskal-Wallis H test were used to compare the bond strength and the ARI scores among the three groups. Hydroabrasion alone produced shear bond strength values below clinical acceptability, while the combination of acid etching and hydroabrasion produced the highest values. The ARI scores in the hydroabrasion group were significantly different from the other groups. Hydroabrasion followed by acid etching was effective in increasing the shear bond strength of orthodontic brackets. Further in vivo studies are needed to confirm the cost and benefits of this technique.
本研究的目的是评估在采用酸蚀、水激光以及两种方法联合使用对牙釉质进行预处理后，正畸托槽的剪切粘结强度和粘结剂残留指数（ARI）。选取30颗拔除的人类前磨牙，分为三组，分别接受酸蚀、水激光或两种方法联合处理。使用复合树脂粘结正畸托槽。用拉伸试验机测试剪切粘结强度，然后在体视显微镜下观察牙齿以评估ARI评分。用扫描电子显微镜成像评估每种预处理方法后的牙釉质形态。采用单因素方差分析和Kruskal-Wallis H检验比较三组之间的粘结强度和ARI评分。单独使用水激光产生的剪切粘结强度值低于临床可接受水平，而酸蚀和水激光联合使用产生的强度值最高。水激光组的ARI评分与其他组有显著差异。先进行水激光处理再进行酸蚀可有效提高正畸托槽的剪切粘结强度。需要进一步的体内研究来证实该技术的成本效益。
