Kula K, Josell S, Kula T J
Department of Pediatric Dentistry, University of North Carolina at Chapel Hill.
Am J Orthod Dentofacial Orthop. 1994 Nov;106(5):513-7. doi: 10.1016/S0889-5406(94)70074-5.
Topical fluorides are frequently prescribed to orthodontic patients to minimize development of initial carious lesions around brackets and bands. However, various topical fluorides are reported to cause surface changes and weight loss of dental materials composed of ceramic elements. Little is known of the effects of these fluorides on ceramic brackets. The purpose of this study was to determine the effects of topical fluorides (0.4% stannous fluoride, 0.5% acidulated phosphate fluoride, and 1.1% sodium fluoride) as compared with water, on the weight and on the surface of the wings and slots of aluminum oxide ceramic brackets. The brackets (n = 10 each treatment agent) were weighed before 6-minute immersions in the treatment agent, rinsed, dried, and reweighed for a total of 10 immersions. The surface appearance of the wings and the slots of the brackets (n = 5 each treatment group) were evaluated with scanning electron microscopy. No statistically significant changes in weight were found among the groups. Surface changes were not observed in either the slots nor the wings of ceramic brackets. Therefore it was concluded that the commercially available topical fluorides when applied as per the regimen in this study to the aluminum oxide ceramic brackets did not cause surface damage or significant weight loss as compared with controls (water).
正畸患者经常被开局部用氟化物，以尽量减少托槽和带环周围早期龋损的发生。然而，据报道，各种局部用氟化物会导致由陶瓷成分组成的牙科材料表面变化和重量损失。对于这些氟化物对陶瓷托槽的影响知之甚少。本研究的目的是确定与水相比，局部用氟化物（0.4%氟化亚锡、0.5%酸性磷酸氟化物和1.1%氟化钠）对氧化铝陶瓷托槽翼和槽的重量及表面的影响。将托槽（每种处理剂n = 10）在处理剂中浸泡6分钟前称重，冲洗、干燥后再次称重，共浸泡10次。用扫描电子显微镜评估托槽翼和槽（每个处理组n = 5）的表面外观。各组之间未发现重量有统计学显著变化。在陶瓷托槽的槽和翼上均未观察到表面变化。因此得出结论，与对照组（水）相比，本研究中按照方案应用市售局部用氟化物于氧化铝陶瓷托槽时，不会造成表面损伤或显著的重量损失。
