Brauchli Lorenz M, Baumgartner Eva-Maria, Ball Judith, Wichelhaus Andrea
Clinic of Orthodontics and Pedodontics, Dental School, University of Basel, Switzerland.
J Orofac Orthop. 2011 Mar;72(1):61-7. doi: 10.1007/s00056-010-0002-3. Epub 2011 Mar 11.
Maintaining an intact enamel surface is an essential aspect of orthodontic therapy; however, various therapeutic measures can affect this surface. The aim of our study was to evaluate roughness of the enamel surface after different conditioning and polishing procedures.
42 bovine incisors were submitted to conventional abrasion (using 37% phosphoric acid), to air abrasion, and a combination of the two. Brackets were put in place and then debonded, and the remaining adhesive removed with a carbide bur or via air abrasion. The enamel surface's roughness was assessed using a confocal laser scanning microscope (CLSM).
Mean roughness (R(a)) was 33.1. There were no statistically significant differences among the six groups, or in R(q) values. Under CLSM, the roughness after polishing via air abrasion appeared even. Although it was macroscopically smoother after polishing with a carbide bur, the surface showed a wave-like pattern.
The method of enamel conditioning revealed no significant effect on the enamel surface after debonding. Neither polishing via air abrasion nor carbide bur resulted in differences in superficial roughness. However, the carbide bur left a wave-like pattern on the enamel surface.
保持牙釉质表面完整是正畸治疗的一个重要方面；然而，各种治疗措施都会影响该表面。我们研究的目的是评估不同预处理和抛光程序后牙釉质表面的粗糙度。
42颗牛切牙分别接受常规酸蚀（使用37%磷酸）、空气喷砂以及两者联合处理。放置托槽后再拆除，并用硬质合金车针或通过空气喷砂去除残留的粘结剂。使用共聚焦激光扫描显微镜（CLSM）评估牙釉质表面的粗糙度。
平均粗糙度（R(a)）为33.1。六组之间以及R(q)值均无统计学显著差异。在CLSM下，空气喷砂抛光后的粗糙度看起来较为均匀。尽管用硬质合金车针抛光后宏观上更光滑，但表面呈现出波浪状图案。
牙釉质预处理方法在托槽拆除后对牙釉质表面无显著影响。空气喷砂抛光和硬质合金车针抛光在表面粗糙度上均无差异。然而，硬质合金车针在牙釉质表面留下了波浪状图案。
