Effect of Different Paraffin’s and Microcrystalline Waxes on the Mechanical Properties of Base Plate Dental Waxes
Journal Title: Saudi Journal of Oral and Dental Research - Year 2017, Vol 2, Issue 7
Abstract
Abstract: Waxes, included beeswax, as one of the most versatile natural substances ever used by man, have already been used in people’s life widely for a long time. Current dental waxes are mixture of paraffin’s, microcrystalline waxes, natural and synthetic raw materials. However, waxes characterize same disadvantage as plasticity and law stability of volume after melting and cooling. Aim of this study was to investigate the influence of different paraffin’s and microcrystalline waxes on the properties of base plate waxes. Fife new compositions (S1-S5) were compared to four commercial products like base plates from Modelling wax, Modelling wax, Modellierwachsrosa standard, Modelling wax Ceradent. The plasticity and the volumetric shrinkage of the waxes after melting and cooling were measured. Samples S1-S5 to reflect of the requirements of the ISO standard and have the proper plasticity. Changing the paraffin’s and microcrystalline waxes have a big influence on the plasticity of the final composition. Microcrystalline waxes decrease the wax contraction. Shrinkage after heating up to 110oC and cooling to 68oC is changing from one wax to other Modelling wax (Interdent) 4.5%, Modeling Wax Ceradent (Spofa) 8.9%, Modelling wax (Bredent) 9.8%, Modellierwachsrosa (Bego) 11.9%. During the re-melting process (inside wax warmers) waxes can change their properties like flowing and volumetric shrinkage due the thermal degradation. Such process can be reducing by producer adding thermal stabilizer, but this material can be consumed after several cycles. From clinical point of view is not recommended to heat and re-melt the base plate waxes for long time in wax warmer especially at higher temperatures. Keywords: dental wax, plasticity, volume shrinkage
Authors and Affiliations
Raszewski Zbigniew, Nowakowska-Toporowska Agnieszka, Weżgowiec Joanna, Nowakowska Danuta
Keywords
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