Kimoto Katsuhiko, Tanaka Kinya, Toyoda Minoru, Ochiai Kent T
Department of Oral and Maxillofacial Rehabilitation, Kangawa Dental College, Yokosuka, Kangawa, Japan.
J Prosthet Dent. 2005 May;93(5):433-8. doi: 10.1016/j.prosdent.2005.02.015.
The inhibitory effect of indirect latex contamination on the polymerization of vinyl polysiloxane (VPS) impression material has been previously reported. However, the transfer of specific elements that cause inhibition has not been confirmed, nor has the removal of such contaminants been reported.
This study examined the surfaces of materials commonly used in restorative procedures that were contaminated by indirect latex glove contact and then evaluated for inhibition of polymerization of VPS. The effect of selected cleansing procedures was then studied.
Four experimental groups (n = 8) were prepared: (1) clean vinyl gloves (control), (2) clean gingival retraction cords (control), (3) contaminated vinyl gloves, and (4) contaminated gingival retraction cord. Microscopic evaluation of the appearance and the characterization of surface particulate contamination were performed for each. Three cleansing protocols were then evaluated for efficacy in cleaning vinyl glove surfaces contaminated by latex contact (n = 10): (1) brushing with water, (2) brushing with soap/rinsing with water, (3) cleansing with rubbing alcohol. The subsequent degree of VPS polymerization inhibition was evaluated subjectively. A chi-square test was used for data analysis (alpha=.05).
Particulate sulfur elements and sulfur-chloride compounds were present on the contaminated substrates. None of the 3 cleansing procedures eliminated polymerization inhibition (P =.33). Residual elemental sulfur remained on all tested surfaces.
Particulate sulfur and sulfur-chloride compounds were identified as the particulate contamination that resulted in polymerization inhibition of the tested VPS dental impression material. Removal of these contaminants from the tested vinyl gloves and gingival retraction cord was not possible with the 3 cleansing protocols tested in this study.
先前已有报道间接乳胶污染对乙烯基聚硅氧烷（VPS）印模材料聚合的抑制作用。然而，导致抑制作用的特定元素的转移尚未得到证实，此类污染物的去除也未见报道。
本研究检查了修复操作中常用材料的表面，这些表面因间接接触乳胶手套而受到污染，然后评估其对VPS聚合的抑制作用。接着研究了所选清洁程序的效果。
制备了四个实验组（n = 8）：（1）干净的乙烯基手套（对照组），（2）干净的牙龈收缩线（对照组），（3）受污染的乙烯基手套，以及（4）受污染的牙龈收缩线。对每组进行表面颗粒污染的外观微观评估和特征分析。然后评估三种清洁方案对清洁因接触乳胶而受污染的乙烯基手套表面的效果（n = 10）：（1）用水刷洗，（2）用肥皂刷洗/用水冲洗，（3）用擦镜醇清洁。主观评估随后的VPS聚合抑制程度。采用卡方检验进行数据分析（α = 0.05）。
受污染的底物上存在颗粒状硫元素和硫氯化物化合物。三种清洁程序均未消除聚合抑制作用（P = 0.33）。所有测试表面均残留有元素硫。
颗粒状硫和硫氯化物化合物被确定为导致测试的VPS牙科印模材料聚合抑制的颗粒污染物。本研究测试的三种清洁方案无法从测试的乙烯基手套和牙龈收缩线上去除这些污染物。
