European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2006
Print ISSN:
0965-7452
Vol:
14
Issue:
1

Recording surface detail on moist surfaces with elastomeric impression materials

Abstract - The objective was to assess the ability to accurately record detail on moist surfaces for three elastomeric impression materials derived from different polymers. One polyvinylsiloxane, one polyether and one hybrid material containing a copolymer of siloxane and polyether polymers were used. Impressions were recorded of moist gypsum casts having both a shallow (~ 20 µm) and deep (~ 180 µm) groove reproduced on their surface. The grooves in the casts and in the impressions were profiled using a non-contacting laser profilometer. Comparisons were made between the groove depths in the casts and impressions (paired t-test). The results indicated that all of the tested materials accurately recorded dimensions in the x-y plane. However, there was evidence that the polyether and hybrid materials were more accurate than the polyvinylsiloxane in recording the true depths of the deep grooves (z plane) under moist conditions. It was concluded that the more hydrophilic nature of the polyether and hybrid materials enabled them to record more accurate impressions of moist surfaces, particularly in areas of difficult access as modelled by the deep grooves.

KEY WORDS: elastomers, dental impressions, polyvinylsiloxanes, polyethers, detail reproduction

Article Price
£15.00
Institution Article Price
£
Page Start
42
Page End
46
Authors
J.F. McCabe, T.E. Carrick

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  1. Film thickness and rheological properties of luting agents for crown cementation
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  1. The effect of cooking method upon the titratable acidity of a popular vegetarian dish – Scope for reducing its erosive potential?
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  1. Variability Of Centric Relation Position In TMD Patients
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  1. Recording surface detail on moist surfaces with elastomeric impression materials
  2. 42
  3. 46