22/07/2021
Putty Index
For this week’s tip, we are looking at the popular usage of putty of polyvinyl siloxane elastomer material (Aquasil soft putty/ regular set, Densply was used in this video) for management of Class IV restoration.
There are several reasons why polyvinyl siloxane elastomer is being used as the silicone key or putty index, for example, its ability to facilitate in optimizing adhesion of composite to mineralised hard tissues, enhances marginal adaptation, seal and mechanical strength and reduces microleakage and increases retention are among the many reasons of it being the perfect impression material to be used for the silicone key. (Nalbandian S., 2009)
It is important for the clinician or the assistant to mix well the base and the catalyst of the putty into a homogenous colour and it was reported that usage of latex gloves containing sulphur or sulphur derivatives during the mixing would delay or inhibit the PVS setting time.(Niellsen et al, 1986)(Rosen M et al 1989)(Ravikumar C.M et al 2012). Hand contaminated operator from the residual powder after degloving may also affect the setting time of these materials (Matis B.A et al,1997)(Delgado A.J et al 2018).
Hence, mixing with clean bare hands are the best guys!
Check out for more tips soon.😎
