Czochrowska E, Ogaard B, Duschner H, Ruben J, Arends J
Department of Orthodontics, Faculty of Dentistry, University of Oslo, Norway.
J Orofac Orthop. 1998;59(5):265-73. doi: 10.1007/BF01321793.
The aim of this study was to evaluate in vivo the cariostatic potential of the resin-reinforced glass-ionomer (Vitremer core build-up restorative; 3M Dental Product Division) when used as a bonding agent for orthodontic brackets. The mineral distribution and topography of the enamel surface adjacent to the bracket base was determined by quantitative microradiography (TMR) and confocal laser scanning microscopy (CLSM). The study was designed in split-mouth technique using 9 pairs of premolars to be extracted for orthodontic reasons. One tooth of each pair was bonded with the resin-reinforced glass-ionomer, and the control contralateral premolar with the non-fluoridated composite (Concise, 3M Dental Products Division). After 4 weeks all teeth were extracted and stored until analysis. The lesion depths and mineral loss values in enamel adjacent to brackets bonded with Vitremer were significantly lower than in teeth bonded with the composite, indicating that the resin-reinforced glass-ionomers significantly reduced caries lesion development in vivo. CLSM images show a severe cariogenic challenge around orthodontic brackets and support TMR measurements.
本研究的目的是在体内评估树脂增强型玻璃离子水门汀（Vitremer核桩修复材料；3M牙科产品部）用作正畸托槽粘结剂时的防龋潜力。通过定量显微放射照相术（TMR）和共聚焦激光扫描显微镜（CLSM）确定托槽基底附近釉质表面的矿物质分布和形貌。本研究采用分口技术设计，使用9对因正畸原因需拔除的前磨牙。每对中的一颗牙齿用树脂增强型玻璃离子水门汀粘结，对侧对照前磨牙用非含氟复合树脂（Concise，3M牙科产品部）粘结。4周后，所有牙齿均被拔除并保存直至分析。与用Vitremer粘结托槽相邻的釉质中的病变深度和矿物质损失值明显低于用复合树脂粘结的牙齿，这表明树脂增强型玻璃离子水门汀在体内显著减少了龋损的发展。CLSM图像显示正畸托槽周围存在严重的致龋挑战，并支持TMR测量结果。
