PMID: 3164909Jun 1, 1988Paper

Impression materials: effect of hydrophilicity and viscosity on ability to displace water from dentin surfaces

Scandinavian Journal of Dental Research
A Peutzfeldt, E Asmussen

Abstract

The water-displacing ability of hydrophilic and hydrophobic impression materials was determined and related to the hydrophilicity and viscosity of the materials. The water-displacing ability of the materials was determined on a network of grooves in a dentin surface covered by a drop of water. After setting of the material, the number of crossings reproduced in the impression was calculated in percent of the total number of crossings. The hydrophilicity was assessed by measuring the contact angle between water and impression material. To determine viscosity, a rotoviscosimeter was used. Impression materials with contact angles less than 70 degrees showed a significant negative correlation between water-displacing ability and contact angle, i.e. the reproducing ability decreased with decreasing hydrophilicity of the materials. Impression materials with contact angles above 70 degrees showed a significant positive correlation between water-displacing ability and viscosity, i.e. the water-displacing ability improved with increasing viscosity.

Citations

Jul 1, 1991·Dental Materials : Official Publication of the Academy of Dental Materials·H Takahashi, W J Finger
Aug 12, 1998·Journal of Dentistry·K W BoeningU Schuette
Feb 13, 2009·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Dariush Hosseinpour, John C Berg
Feb 3, 2011·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Techkouhie A HamalianJosé J Chidiac
Feb 1, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·Frank RuppJürgen Geis-Gerstorfer
Jul 31, 2009·Journal of Dental Research·M BalkenholB Wöstmann
Dec 13, 2005·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Mary P WalkerKaren Williams
Dec 20, 2005·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Cynthia S PetrieKaren Williams

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