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Impression technique for RPDs. A comparison between two methods.

J Gunne1, J Högström, H Nilson

  • 1Department of Prosthetic Dentistry, University of Umeå, Sweden.

Swedish Dental Journal
|January 1, 1990
PubMed
Summary
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This study compared dental impression techniques using ZOE-paste and silicone materials. ZOE-paste showed greater lingual extension, with no significant differences in precision or buccal extension between methods.

Area of Science:

  • Dental Materials Science
  • Prosthodontics

Background:

  • Accurate dental impressions are crucial for prosthodontic treatment success.
  • Evaluating different impression materials and techniques is essential for optimizing clinical outcomes.

Purpose of the Study:

  • To develop a standardized method for comparing dental impression techniques and materials.
  • To compare the marginal and overall extension of impressions made with Zinc Oxide Eugenol (ZOE)-paste and silicone materials.
  • To assess the precision of ZOE-paste and silicone impression methods.

Main Methods:

  • A custom device was engineered to ensure consistent positioning of impression trays during material application.
  • Impression techniques utilizing ZOE-paste and silicone materials were compared.
  • Impression extension (lingual and buccal) and precision were quantitatively evaluated.

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Main Results:

  • ZOE-paste, when used with a border-molded tray, resulted in significantly greater lingual impression extension compared to silicone.
  • No significant differences in buccal impression extension were observed between ZOE-paste and silicone materials.
  • The study found no measurable differences in the precision of the two impression methods.

Conclusions:

  • Border-molded ZOE-paste offers enhanced lingual extension in dental impressions.
  • Both ZOE-paste and silicone impression materials demonstrate comparable precision and buccal extension for the tested methods.
  • The developed methodology provides a reliable basis for comparing dental impression materials and techniques.