Schmidlin Patrick R, Schätzle M, Fischer J, Attin T
Clinic of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Center of Dental Medicine, Plattenstrasse 11, 8032 Zürich, Switzerland.
J Dent. 2008 Feb;36(2):125-9. doi: 10.1016/j.jdent.2007.11.005.
The purpose of this study was to assess the shear bond strength (SBS) of metal brackets when placed with a caries protective adhesive patch.
Forty stainless steel brackets (Ormco) were bonded to 40 bovine enamel samples according to the following conditioning/bonding procedures using a resin-based orthodontic luting material (Heliosit Orthodontic, N=10 per group): (A) 35% phosphoric acid (30s), rinse and dry; (B) as in A but additional placement of a prototype adhesive patch (Ivoclar Vivadent) using a bonding agent (Heliobond); (C) application of a two-step self-etch adhesive (AdheSE); (D) as in C but additional patch placement. Samples were stored at 37 degrees C for 24h. SBS was measured with a universal testing machine with a crosshead speed of 0.5mm/min and the adhesive remnant index (ARI) was determined under a stereomicroscope (16x).
Mean SBS (standard deviation) values were as follows: (A) 16.6 (6.4)MPa; (B) 12.2 (5.8); (C) 12.9 (5.0); and (D) 10.5 (4.7). Analysis of variance followed by Bonferroni correction revealed no statistically significant differences. In 2 (B) and 4 (D) specimens, complete retention of the adhesive patch was observed.
All treatment groups showed adequate bond strength values. The adhesive patch could therefore be applied in combination with orthodontic brackets and seal the enamel adjacent to the bracket.
本研究旨在评估使用防龋粘结贴片放置金属托槽时的剪切粘结强度（SBS）。
使用树脂基正畸粘结材料（Heliosit Orthodontic，每组N = 10），根据以下预处理/粘结程序，将40个不锈钢托槽（奥美科）粘结到40个牛牙釉质样本上：（A）35%磷酸（30秒），冲洗并干燥；（B）同A，但额外使用粘结剂（Heliobond）放置一个原型粘结贴片（义获嘉伟瓦登特）；（C）应用两步自酸蚀粘结剂（AdheSE）；（D）同C，但额外放置贴片。样本在37℃下储存24小时。使用万能试验机以0.5mm/min的十字头速度测量SBS，并在体视显微镜（16倍）下确定粘结剂残留指数（ARI）。
平均SBS（标准差）值如下：（A）16.6（6.4）MPa；（B）12.2（5.8）；（C）12.9（5.0）；（D）10.5（4.7）。方差分析后进行Bonferroni校正，结果显示无统计学显著差异。在2个（B组）和4个（D组）样本中，观察到粘结贴片完全保留。
所有治疗组均显示出足够的粘结强度值。因此，粘结贴片可与正畸托槽联合使用，并封闭托槽附近的牙釉质。
