Matis B A, Valadez D, Valadez E
Department of Restorative Dentistry, Indiana University School of Dentistry, Indianapolis 46202, USA.
J Prosthodont. 1997 Sep;6(3):189-92. doi: 10.1111/j.1532-849x.1997.tb00089.x.
The purpose of this study was to determine the delay in setting times that occurs with selected brands of gloves or residual powder from those gloves on eight popular brands of vinyl polysiloxane putties.
The putties were mixed and rolled into a round 3-inch-long cylinder without gloves on hand, with gloves on hand, and with powder residue on hands, immediately after degloving. The end of a cement spatula was drawn over the putty at various intervals with a force of 3 ounces. The setting time was recorded to be when no permanent indentation of the putty occurred.
All materials set within 5 minutes without gloved hands. Eighty-eight percent of the putties set within 5 minutes when mixed with Friction Grip Powder Free and Medical Gloves on hands. When mixed with Pharmaseal gloves on hands, 50% of the putties set in 5 minutes. When mixed with Micro-Touch Latex Medical Gloves, 38% of the putties set in 5 minutes. When the putties were mixed with the residual powders left on ungloved hands, the same results occurred with the above-mentioned gloves. With residual powder on hands from Natraflex and Medical Exam Tex, 25% of the putties set in 5 minutes.
Gloved hands interfered with the setting of more brands of putties than did residual powder on hands immediately after degloving. There are gloves available that do not interfere with the setting of most of the vinyl polysiloxane putties.
本研究的目的是确定在八种流行品牌的乙烯基聚硅氧烷印模材料上，使用选定品牌的手套或这些手套上的残留粉末时凝固时间的延迟情况。
将印模材料混合并滚成一个3英寸长的圆柱体，分别在不戴手套、戴手套以及脱手套后手上有粉末残留的情况下进行操作。用水泥刮刀的一端以3盎司的力在不同时间间隔划过印模材料。记录凝固时间为印模材料不再产生永久性压痕的时刻。
所有材料在不戴手套时5分钟内凝固。手上戴有免摩擦防滑粉手套和医用手套混合时，88%的印模材料在5分钟内凝固。手上戴有Pharmaseal手套混合时，50%的印模材料在5分钟内凝固。手上戴有Micro - Touch乳胶医用手套混合时，38%的印模材料在5分钟内凝固。当印模材料与未戴手套手上的残留粉末混合时，与上述手套混合时出现相同结果。手上有Natraflex和医用检查Tex手套的残留粉末时，25%的印模材料在5分钟内凝固。
戴手套的手比脱手套后手上的残留粉末对更多品牌印模材料凝固的干扰更大。有一些手套不会干扰大多数乙烯基聚硅氧烷印模材料的凝固。
