The Effect of Different Types of Gloves on the Setting Time of Polyvinylsiloxane (PVS) Putty Impresion Materials

Abstract

Keywords: Setting time, Putty material, Polyvinylsiloxane, Vinyl gloves, Latex gloves.<br>Abstract. The purpose of this study was to evaluate the effect of different types of gloves on the setting time of<br>two brands of polyvinylsiloxane putty impression materials.<br>Seven brands of gloves (Vitex, LEG, LG, Proguard, NRL, Modern and Peha-Taft) were used for mixing<br>two brands of polyvinylsiloxane putty impression materials (President and Reprosil). The setting times of these<br>two putties were tested and compared to control group (mixing with washed ungloved hand). The setting times of<br>putties were tested using a machine called “Oscillating Rheometer”. The putties were mixed according to the<br>manufacturer's recommendation and then placed under the arm of the Oscillating Rheometer to record the setting<br>time of the putty materials. The machine was adapted to let the material set at 37&#186;C temperature (oral temperature).<br>After every trial the machine was cleaned well. Hands were washed thoroughly with water and dried well with<br>paper towel. Every recording was reposted in special table. The maximum time to allow the material to set was 15<br>minutes (900 seconds).<br>The vinyl gloves tested had no effect on the setting time of President and Reprosil putties. Some brands of<br>latex gloves caused severe retardation or complete inhibition on the setting process of the tested impression<br>materials.