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Hindi Research Article
Influence of Repeat Pours of Addition Silicone Impressions on the Dimensional Accuracy of Casts
Mehta R1*, Wadhwa S1, Duggal N1, Kumar A2, Goel M3 and Pande S4
1 Department of Prosthodontics, Government Dental College and Hospital, Patiala-147001, Punjab, India.
2 Department of Pedodontics & Preventive Dentistry, Post Institute of Dental Sciences Rohtak-124001, Haryana, India.
3 Department of Oral and Maxillofacial Surgery, Post Institute of Dental Sciences Rohtak-124001 (Haryana) India.
4 Department of Prosthodontics, Baba Banarsi Das college of Dental Sciences, Lucknow, India.
- Corresponding Author:
- Dr. Richa Mehta, MDS
Department of Prosthodontics
Government Dental College and Hospital
Patiala-1 47001, Punjab, India
Tel: +919671487063
E-mail: richaips@gmail.com
Received Date: November 26, 2013; Accepted Date: January 10, 2014; Published Date: January 15, 2014
Citation: Mehta R, Wadhwa S, Duggal N, Kumar A, Goel M, et al. (2014) Influence of Repeat Pours of Addition Silicone Impressions on the Dimensional Accuracy of Casts. J Interdiscipl Med Dent Sci 2:108. doi: 10.4172/2376-032X.1000108
Copyright: © 2014 Mehta R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Abstract
Aims and objectives: To evaluate and compare the time dependent dimensional accuracy of polyvinyl siloxane impressions. Materials and methods: A brass master die containing two identical posts simulating two complete crown tapered abutment preparation was served as a standardized master model. Impressions were made with polyvinyl siloxane materials (monophase and regular body) using a brass made custom tray. The impressions were repeatedly poured at 15 min, 75 min, 24 hours, 48 hours and 1 week., Interabutment and intraabutment distance were measured in the recovered stone dies (type iv, kalrock) using a profile projector with an accuracy of 0.001 mm. Results: Results of this study indicated that the casts made were dimensionally accurate and the polyvinyl siloxane silicones are dimensionally stable impressions for one week period. Conclusion: Repeated pouring of the impressions at the five different time periods did not significantly affect the accuracy of the casts produced.
