Choi Samjin, Park Ki-Ho, Cheong Youjin, Kim Hee-Kyun, Park Young-Guk, Park Hun-Kuk
Department of Biomedical Engineering and Healthcare Industry Research Institute, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, Republic of Korea.
Scanning. 2011 Jan-Feb;33(1):25-32. doi: 10.1002/sca.20218. Epub 2011 Jan 26.
This study examined the effects of an orthodontic treatment using a bicuspid extraction on the surface roughness and mechanical properties of stainless steel (SS) brackets adjacent to the extraction space. Four experimental groups were employed; groups 1 and 2 used the Archist(®) SS brackets before and after the extraction treatment, respectively, and groups 3 and 4 used the Victory(®) SS brackets before and after the extraction treatment, respectively. The slot surfaces of the bracket were scanned in air at a resolution of 512 × 512 pixels with a scan speed of 0.8 line/s. The visco-elasticity of the bracket slot was determined from the force-distance curves of atomic force microscopy. The orthodontic treatment with bicuspid extraction led to a significant increase (p<0.0001) in surface roughness in both groups. In particular, the Archist(®) SS brackets showed more changes than the Victory(®) SS brackets (p<0.0005). However, there was no significant difference in properties of the Victory(®) and Archist(®) brackets between before and after treatment. This suggests that the orthodontic treatment with bicuspid extraction is more responsible for the changes in surface roughness than the properties of the brackets.
本研究考察了使用双尖牙拔除的正畸治疗对拔牙间隙相邻不锈钢（SS）托槽表面粗糙度和力学性能的影响。采用了四个实验组；第1组和第2组分别在拔牙治疗前后使用Archist（®）SS托槽，第3组和第4组分别在拔牙治疗前后使用Victory（®）SS托槽。托槽的槽沟表面在空气中以512×512像素的分辨率、0.8线/秒的扫描速度进行扫描。通过原子力显微镜的力-距离曲线确定托槽槽沟的粘弹性。双尖牙拔除的正畸治疗导致两组的表面粗糙度均显著增加（p<0.0001）。特别是，Archist（®）SS托槽比Victory（®）SS托槽表现出更多变化（p<0.0005）。然而，Victory（®）和Archist（®）托槽在治疗前后的性能没有显著差异。这表明双尖牙拔除的正畸治疗对表面粗糙度变化的影响比托槽性能的影响更大。
