Comparison Of The Effect Of Marginal Thickness On Linear Accuracy Of Impressions And Stone Dies Using Vinyl Polysiloxane Ether And Poly Vinyl Siloxane: An In Vitro Study

Dr.Pattanaik Bikash; Dr. Nazirkar Girish S.; Dr. Padiyar Prasad R.; Dr. Farooqui AhmedFaraz M.; Dr. Sanap Vishakha P.; Dr. Bhosale Ashwini A.

Volume : VII, Issue : VI, June - 2018

Comparison Of The Effect Of Marginal Thickness On Linear Accuracy Of Impressions And Stone Dies Using Vinyl Polysiloxane Ether And Poly Vinyl Siloxane: An In Vitro Study

Dr. Pattanaik Bikash, Dr. Nazirkar Girish S. , Dr. Padiyar Prasad R. , Dr. Farooqui Ahmedfaraz M. , Dr. Sanap Vishakha P. , Dr. Bhosale Ashwini A.

Abstract :

Context: Space available gingival retraction is 0.3–0.4mm. However, after 40s, only 0.2mm of it is available. This is a concern when multiple impressions have to be made.

Aim:To compare the effect of impression margin thickness made using poly vinyl siloxane(PVS) and vinyl siloxane ether(VSE) on the linear accuracy of impressions and stone dies.

Methodology: A stainless–steel die was prepared with a square cavity in the centre with spaces of 4 varying widths. Ten impressions were made using VSE and PVS each and stone dies were poured.The accuracy of impressions and stone dies was measured.

Results: Impressions with thin margin of 0.1 mm showed maximum distortion and the same was with the dies. One–way ANOVA for PVS showed significant difference (P<0.05) while with VSE showed highly significant difference (P<0.001).

Conclusion: Theoverall accuracy of PVS was found to be high and can be the preferred material of choice.