| Autor: |
Patil, Padmakar S., Chowdhary, Ramesh, Mishra, Sunil |
| Předmět: |
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| Zdroj: |
Journal of Indian Prosthodontic Society; Sep2008, Vol. 8 Issue 3, p156-161, 6p, 5 Color Photographs, 2 Charts, 1 Graph |
| Abstrakt: |
BACKGROUND: While literature demonstrates that the optimum accuracy is obtained with the custom trays, the use of stock trays for elastomeric impressions appears to be popular in general practice. OBJECTIVE: This in vitro study was done to evaluate the linear dimensional accuracy of impression made in stock trays and custom trays, using polyvinyl siloxanes. MATERIAL AND METHODS: The different impressions technique of polyvinyl siloxanes utilized in this study are as follows: 1) Putty wash 2-step technique with polyethylene spacer using stock tray. 2) Single mix technique utilizing medium viscosity in a custom tray. 3) Multiple mix technique utilizing heavy viscosity and low viscosity combination in a custom tray. For each technique, 10 impressions of a maxillary dentulous metal master model were made. The accuracy was assessed by measuring the three dimensions on stone casts poured from impressions of the master model. RESULTS: One-way analysis of variance showed statistically insignificant difference among the three different impression techniques for the different dimensions. CONCLUSION: Making custom tray is time consuming and costly; therefore putty wash 2-step technique with controlled bulk in stock tray can be used as an alternative to provide accurate impressions, as obtained from custom trays. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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