Kim Seong-Sik, Park Woo-Kyung, Son Woo-Sung, Ahn Hyung-Soo, Ro Jung-Hoon, Kim Yong-Deok
Department of Orthodontics, College of Dentistry, Pusan National University, Pusan, Korea.
Am J Orthod Dentofacial Orthop. 2007 Jul;132(1):71-6. doi: 10.1016/j.ajodo.2005.07.027.
The purpose of this study was to determine the utility of sandblasting to remove composite remnants after orthodontic bracket debonding.
The sample consisted of 20 human premolars extracted for orthodontic purposes. The buccal surface of each premolar was divided into 3 parts: the upper half (control surface group, CS), the lower half left (LS group), and the lower half right (SS group). A composite resin paste (volume, 5 x 3 x 1 mm3) was bonded onto the LS and SS surfaces. Then it was removed by using 1 of 2 methods: low-speed handpiece with tungsten carbide bur in the LS group and sandblasting in the SS group. Temperature change and removal time were recorded, and surface profiles were examined with 3-dimensional profilometry.
An independent t test showed a statistically significant difference in temperature change between the LS and SS groups (P <.01). ANOVA showed no significant difference in surface profile between the LS and SS groups (P >.5).
The results suggest that intraoral sandblasting might be an alternative to rotatory instruments for resin remnant removal after orthodontic bracket debonding.
本研究的目的是确定喷砂处理在正畸托槽脱粘后去除复合树脂残留的效用。
样本包括20颗因正畸原因拔除的人类前磨牙。每颗前磨牙的颊面分为3部分：上半部分（对照表面组，CS）、下半部分左侧（LS组）和下半部分右侧（SS组）。将复合树脂糊剂（体积，5×3×1立方毫米）粘结在LS和SS表面。然后通过以下两种方法之一将其去除：LS组使用带碳化钨车针的低速手机，SS组进行喷砂处理。记录温度变化和去除时间，并用三维轮廓仪检查表面轮廓。
独立t检验显示LS组和SS组之间的温度变化有统计学显著差异（P<.01）。方差分析显示LS组和SS组之间的表面轮廓无显著差异（P>.5）。
结果表明，正畸托槽脱粘后，口腔内喷砂处理可能是去除树脂残留的旋转器械的一种替代方法。
