The Journal of Indian Prosthodontic Society

ORIGINAL ARTICLE
Year
: 2008  |  Volume : 8  |  Issue : 3  |  Page : 156--161

Comparison of custom trays and stock trays using polyvinylsiloxane to evaluate linear dimensional accuracy: An in vitro study


Padmakar S Patil, Ramesh Chowdhary, Sunil Mishra 
 Department of Maxillofacial Prosthodontics and Implantology, HKE'S S. Nijalingappa Institute of Dental Sciences and Research, Gulbarga, Karnataka, India

Correspondence Address:
Padmakar S Patil
HKE«SQ»S S. Nijalingappa Institute of Dental Sciences and Research, Gulbarga -585 102, Karnataka
India

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.


How to cite this article:
Patil PS, Chowdhary R, Mishra S. Comparison of custom trays and stock trays using polyvinylsiloxane to evaluate linear dimensional accuracy: An in vitro study.J Indian Prosthodont Soc 2008;8:156-161


How to cite this URL:
Patil PS, Chowdhary R, Mishra S. Comparison of custom trays and stock trays using polyvinylsiloxane to evaluate linear dimensional accuracy: An in vitro study. J Indian Prosthodont Soc [serial online] 2008 [cited 2021 Feb 27 ];8:156-161
Available from: https://www.j-ips.org/article.asp?issn=0972-4052;year=2008;volume=8;issue=3;spage=156;epage=161;aulast=Patil;type=0