Chong S L, Lam Y K, Lee F K, Ramalingam L, Yeo A C, Lim C C
National University of Singapore, Department of Restorative Dentistry, Malaysia.
Oper Dent. 1998 Mar-Apr;23(3):150-4.
This study (1) compared the curing-light intensity with various barrier infection-control methods used to prevent cross contamination, (2) compared the Knoop hardness value of cured composite resin when various barrier control methods were used, and (3) correlated the hardness of the composite resin with the light-intensity output when different infection-control methods were used. The light-cure unit tips were covered with barriers, such as cellophane wrap, plastic gloves, Steri-shields, and finger cots. The control group had no barrier. Composite resins were then cured for each of the five groups, and their Knoop hardness values recorded. The results showed that there was significant statistical difference in the light-intensity output among the five groups. However, there was no significant statistical difference in the Knoop hardness values among any of the groups. There was also no correlation between the Knoop hardness value of the composite resin with the light-intensity output and the different infection-control methods. Therefore, any of the five infection-control methods could be used as barriers for preventing cross-contamination of the light-cure unit tip, for the light-intensity output for all five groups exceeded the recommended value of 300 W/m2. However, to allow a greater margin of error in clinical situations, the authors recommend that the plastic glove or the cellophane wrap be used to wrap the light-cure tip, since these barriers allowed the highest light-intensity output.
(1) 比较了用于预防交叉污染的各种屏障感染控制方法下的固化光强度；(2) 比较了使用各种屏障控制方法时固化复合树脂的努氏硬度值；(3) 关联了使用不同感染控制方法时复合树脂的硬度与光强度输出。光固化单元尖端覆盖有屏障，如玻璃纸、塑料手套、消毒防护膜和指套。对照组无屏障。然后对五组中的每一组进行复合树脂固化，并记录其努氏硬度值。结果显示，五组之间的光强度输出存在显著统计学差异。然而，各组之间的努氏硬度值没有显著统计学差异。复合树脂的努氏硬度值与光强度输出及不同感染控制方法之间也没有相关性。因此，五种感染控制方法中的任何一种都可用作预防光固化单元尖端交叉污染的屏障，因为所有五组的光强度输出均超过了300 W/m² 的推荐值。然而，为了在临床情况下留出更大的误差范围，作者建议使用塑料手套或玻璃纸包裹光固化尖端，因为这些屏障能使光强度输出最高。
