Evaluation of three impression techniques for osseointegrated oral implants

The purpose of this in vitro investigation was to determine the accuracy of gypsum casts produced from impressions made with polyether, polyether and impression plaster, or polyether and acrylic resin for the fabrication of osseointegrated implant prostheses. Strain gauges were attached to a master...

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Bibliographic Details
Published inThe Journal of prosthetic dentistry Vol. 69; no. 5; pp. 503 - 509
Main Authors Inturregui, Jose A., Aquilino, Steven A., Ryther, Jeffrey S., Lund, Peter S.
Format Journal Article
LanguageEnglish
Published United States Mosby, Inc 01.05.1993
Subjects
Acrylic Resins
Calcium Sulfate
Dental Implantation, Endosseous - methods
Dental Impression Materials
Dental Impression Technique
Dental Models
Dental Stress Analysis
Dentistry
Ethers
Humans
Tensile Strength
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Summary:The purpose of this in vitro investigation was to determine the accuracy of gypsum casts produced from impressions made with polyether, polyether and impression plaster, or polyether and acrylic resin for the fabrication of osseointegrated implant prostheses. Strain gauges were attached to a master framework to determine the passivity of fit of the framework to sample casts made by the three impression techniques. Strain values were statistically compared by one way analysis of variance and Duncan's multiple range test. A statistically significant difference was found between the three impression techniques tested ( p < 0.05). The results of this investigation revealed that none of the impression techniques resulted in an absolutely passive framework fit. However, of the techniques tested, the polyether alone resulted in the closest duplication of the master cast.
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ISSN:0022-3913
1097-6841
DOI:10.1016/0022-3913(93)90160-P