Open AccessDetail Reproduction of Elastomeric Materials: Effect of Viscosity and Groove Geometry
Author(s) -
NZN Mahmood,
NHA Kasim,
M Azuddin,
NLA Kassim
Publication year - 2015
Publication title -
compendium of oral science
Language(s) - English
Resource type - Journals
eISSN - 2637-0611
pISSN - 2289-1102
DOI - 10.24191/cos.v2i0.17523
Subject(s) - groove (engineering) , impression , elastomer , materials science , composite material , putty , viscosity , block (permutation group theory) , geometry , mathematics , computer science , metallurgy , world wide web , coating
Objective: To evaluate the effect of type of viscosity and groove on surface detail reproduction of elastomeric impression materials. Methods: Two polyvinylsiloxane and polyether elastomeric impression materials were investigated. An aluminium cylindrical reference block with V- and U-shaped grooves of 1 mm and 2 mm in depth was machined using CAD-CAM system. Impressions of the block were taken to produce 35 master dies. Each die was immersed in distilled water for 5 minutes prior to impression making. Surface topography of the dies and impressions were captured using Alicona Imaging System. Mean difference in depth between the master dies and corresponding impressions’ grooves were analyzed. Results: Type of viscosities and groove showed significant main effects on surface detail (p .01). Express™ putty/light exhibited the lowest mean difference in depth for all grooves. The highest mean difference for U1 (38.3μm ± 21.55), U2 (52.96μm ± 30.39),V1 (45.02μm ± 34.82) and V2 (58.44μm ± 44.19) was obtained from Impregum medium, Aquasil medium, Impregum™ heavy/light and Impregum™ heavy/light groups respectively. Conclusion: Express putty/light-bodied material produced the best surface detail, and Ushaped groove showed superior detail reproduction.