Long-term dimensional stability and reproduction of surface detail of four polyvinyl siloxane duplicating materials

Journal of Dentistry
Ravi PantDavid R Radford

Abstract

Duplicating materials must routinely accurately reproduce the details of dental casts and thus contribute significantly to the close adaptation and success of a removable prosthesis or fixed indirect restoration. It is important to establish the long-term dimensional stability of polyvinyl siloxane materials (PVS) as they are widely used in dental technology and over the duration of a course of treatment, are stored under dental laboratory conditions. The dimensional stability of four PVS duplicating materials was investigated over a 13-week period. Forty PVS duplicate moulds of a partially dentate maxillary arch were produced from four materials (Elite double 8, Gemini transparent, C & J pourable silicone and Z Dupe). Three dimensions were measured in triplicate at baseline 1, 5, 9 and 13 weeks using computerised image analysis. Half of the specimens were measured following storage at room temperature (21+/-2 degrees C) and half at 37 degrees C to represent storage in hot climates. Specimens for scanning electron microscopy were prepared by duplicating a rugosity standard. At room temperature two materials Elite Double 8 and Z Dupe showed no statistically significant dimensional change, the other two materials showed a slight ...Continue Reading

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Citations

Feb 3, 2011·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Techkouhie A HamalianJosé J Chidiac
Dec 19, 2014·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Usama Nassar, Ava K Chow
Dec 16, 2017·Acta Biomaterialia Odontologica Scandinavica·Francisco MartinsPaulo Maurício
Feb 2, 2013·Dental Materials Journal·Shifra LevartovskyRaphael Pilo

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