Lee Yong-Keun, Lim Yong-Kyu
Department of Dental Biomaterial Science and Dental Research Institute, College of Dentistry, Seoul National University, Seoul, Korea.
Am J Orthod Dentofacial Orthop. 2008 Oct;134(4):556-62. doi: 10.1016/j.ajodo.2006.10.027.
The objective of this study was to determine 3 dimensionally the amount of adhesive remaining on teeth after debonding orthodontic brackets.
Three kinds of adhesives were investigated. Metal brackets were bonded to 45 extracted premolars (15 for each adhesive). Labial surfaces of the teeth were scanned before bonding and after debonding. Remaining volume, maximum height, mean maximum height, and mean height of the adhesive remaining on the tooth after debonding were determined, and adhesive remnant index (ARI) scores were measured. Data were analyzed with the Kruskal-Wallis test. Regression analysis was performed between each parameter for the remaining adhesive and the ARI.
Scanned profiles of the tooth surfaces after debonding showed the remaining adhesive clearly. Volume and mean height were significantly different by the type of adhesive (P <0.05). For the ARI scores, 2 resin-based adhesives showed similar trends; however, a smaller portion of the resin-modified glass ionomer adhesive remained on the teeth. Parameters for remaining adhesive and ARI scores showed significant correlations (r = 0.332-0.486; P <0.05).
Quantitative data for the remaining adhesive provides more detailed information about the debonded enamel surface.
本研究的目的是三维确定正畸托槽脱粘后牙齿上残留的粘结剂的量。
研究了三种粘结剂。将金属托槽粘结到45颗拔除的前磨牙上（每种粘结剂15颗）。在粘结前和脱粘后对牙齿的唇面进行扫描。确定脱粘后牙齿上残留粘结剂的剩余体积、最大高度、平均最大高度和平均高度，并测量粘结剂残留指数（ARI）评分。数据采用Kruskal-Wallis检验进行分析。对残留粘结剂的每个参数与ARI之间进行回归分析。
脱粘后牙齿表面的扫描轮廓清楚地显示了残留的粘结剂。粘结剂类型对体积和平均高度有显著差异（P<0.05）。对于ARI评分，两种树脂基粘结剂显示出相似的趋势；然而，树脂改性玻璃离子粘结剂残留在牙齿上的部分较少。残留粘结剂的参数与ARI评分显示出显著相关性（r = 0.332 - 0.486；P<0.05）。
残留粘结剂的定量数据为脱粘后的釉质表面提供了更详细的信息。
