The influence of handling on the elasticity of addition silicone putties.
The handling of vinyl polysiloxane (addition silicone) impression putties with latex gloves is said to interfere with the setting of these impression materials. The aim of this study is to evaluate the effect of handling techniques on the setting of vinyl polysiloxane impression putties using several types of gloves. The setting of these materials was evaluated by means of an elasticimeter. Four vinyl polysiloxane putty impression materials and five brands of gloves (one made of vinyl, one of synthetic rubber, and three of natural rubber) were studied. Based on the type of glove, they were previously washed or not, and a spatula was used or not for initial mixing (before handmixing). The vinyl, the synthetic and one of the natural rubber gloves did not require the previous washing procedure and/or the use of a spatula for initial mixing. Two other natural rubber gloves - depending on the silicone -, showed satisfactory results only when the initial mixing was performed with a spatula. It was concluded that setting inhibition depends on the kind of vinyl polysiloxane impression material and the kind of gloves used, but when the initial mixing was performed with the spatula this setting inhibition was overcome. The results of this study also showed that it is possible to associate cross-contamination control and satisfactory performance of addition silicone putty materials. When doubts arise from the compatibility between vinyl polysiloxane impression putties and gloves, the initial mixing should be performed with a spatula.
Rodrigues Filho
Leonardo Eloy
LE
Dental Materials Department, School of Dentistry, University of São Paulo, Brazil.
Muench
Antonio
A
Francci
Carlos
C
Luebke
Angelika Katia
AK
Traina
Andréia Aparecida
AA
D003760:Dental Impression Materials; D004548:Elasticity; D017575:Gloves, Protective; D007840:Latex; D011145:Polyvinyls; D012833:Siloxanes; D014867:Water
D003760:Dental Impression Materials; D007840:Latex; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D014867:Water