Orthodontic Postgraduate Program, Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Am J Orthod Dentofacial Orthop. 2011 Oct;140(4):527-30. doi: 10.1016/j.ajodo.2010.09.030.
The aim of this prospective randomized clinical trial was to determine the effect of using fluoridated paste (Dentsply, York, Pa) compared with plain pumice (Ortho Technology, Tampa, Fla) on the clinical bond failure rates of precoated brackets bonded with self-etching primer.
A split-mouth technique was used. The teeth in the maxillary right and mandibular left quadrants were prepared with a fluoridated paste only, and the teeth in the maxillary left and mandibular right quadrants were prepared with plain pumice before bonding the precoated brackets. A total of 627 brackets in 34 orthodontic patients (20 female, 14 male) were included in this study; 315 brackets were bonded after pumice treatment, and 312 were bonded after paste treatment. The patients were followed for 6 months to determine the rates of bracket failure.
The overall failure rate was 8%. The failure rates for pumice and paste were 4.8% and 11.2%, respectively. The McNemar test showed a statistically significant difference between the 2 groups. Based on tooth type, the failure rate of the maxillary canine and the mandibular central incisor brackets were significantly different for paste and pumice. There was also a difference in the survival rates of the brackets in both groups.
Preparation of the enamel surface with fluoridated paste before bonding with self-etching primer is not recommended. However, the use of plain pumice is recommended, even if it is time-consuming.
本前瞻性随机临床试验的目的是确定使用含氟牙膏（Dentsply，宾夕法尼亚州约克）与普通浮石（Ortho Technology，佛罗里达州坦帕）相比，对使用自酸蚀底漆粘结的预涂层托槽的临床粘结失败率的影响。
采用分口技术。上颌右侧和下颌左侧象限的牙齿仅用含氟牙膏处理，上颌左侧和下颌右侧象限的牙齿用普通浮石处理后再粘结预涂层托槽。本研究共纳入 34 名正畸患者（20 名女性，14 名男性）的 627 个托槽；315 个托槽在浮石处理后粘结，312 个托槽在牙膏处理后粘结。对患者进行了 6 个月的随访，以确定托槽的失败率。
总的失败率为 8%。浮石和牙膏的失败率分别为 4.8%和 11.2%。McNemar 检验显示两组间存在统计学差异。根据牙齿类型，在上颌尖牙和下颌中切牙托槽中，牙膏和浮石的失败率有显著差异。两组的托槽存活率也存在差异。
不建议在使用自酸蚀底漆粘结前用含氟牙膏处理牙釉质表面。然而，即使耗时较长，也推荐使用普通浮石。
