| Accuracy of addition silicones as a function of technique. | |
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MedLine Citation:
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PMID: 3514856 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Both addition and condensation silicones produced stone dies that were larger in diameter and shorter in height than the tooth preparation. For both materials, there was little change in the distance between stone die preparations compared with the standard. The most significant difference between types of silicone was that condensation silicones produced significantly shorter dies (-0.24% to -0.37%) than addition silicones (-0.08%). Among addition silicones, Cinch produced more than twice as much vertical change (-0.16%) than the other three products (-0.06%). Since castings made from a short die will not seat completely on the prepared tooth, these results support the use of three of the four addition silicones tested. The same accuracy of impressions was achieved for all techniques (that is, putty/wash, single mix, and double mix) when addition silicones were used, whereas the putty/wash technique produced the most accurate dies for the condensation silicones. The custom tray produced dies that were much more accurate in vertical dimensions (-0.03%) than the stock trays (-0.15% to -0.21%). Thus the custom tray is the impression tray of choice, even for addition silicones, which produce relatively little polymerization shrinkage and are dimensionally stable. |
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Authors:
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G H Johnson; R G Craig |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of prosthetic dentistry Volume: 55 ISSN: 0022-3913 ISO Abbreviation: J Prosthet Dent Publication Date: 1986 Feb |
Date Detail:
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Created Date: 1986-04-25 Completed Date: 1986-04-25 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0376364 Medline TA: J Prosthet Dent Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 197-203 Citation Subset: D; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Chemistry, Physical Dental Impression Materials* Dental Impression Technique* / instrumentation Dental Models Physicochemical Phenomena Silicones* Viscosity |
| Grant Support | |
ID/Acronym/Agency:
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DE07057/DE/NIDCR NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Dental Impression Materials; 0/Silicones |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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