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Harsukh Educational Charitable Society International Journal of Community Health and Medical Research

Volume 6 Issue 2 (April - June), 2020

Original Articles

Comparative analysis of impression techniques using polyvinylsiloxane for Fixed Partial Dentures
Rajender Singh, Anika Uppal

Background: Making impressions to replicate oral conditions and tooth morphology is an integral part of prosthetic dentistry. Polyvinyl siloxane impression materials have the best fine detail reproduction and elastic recovery of all available materials. Because there is no by-product, they possess remarkable dimensional stability and are odorless, tasteless and pleasant for patients. They are provided in wide range of viscosities, rigidities, and working and setting times. Aim of the study: To compare impression techniques using polyvinylsiloxane for Fixed Partial Dentures. Materials and methods: The present study was conducted in the Department of Prosthodontics of the Dental institution. We selected 100 patients reporting to the Department clinic requiring fixed partial denture (FPD) as their dental treatment for the study group. The age of the subjects ranged from 10- 40 years. Patients having history of allergic reaction to materials to be used in study were excluded from the study. Results: We observed that defects were more commonly seen in impressions made from technique 2 (n=42). Most common defect seen in both of the techniques was Voids in the impression (n=9 for technique 1; n=19 for technique 2). We observed that bubbles in the impressions were more commonly seen at areas beside the margins (52.87%). Pull defects were seen solely at the margins. The voids in the impression were seen more commonly at areas beside margins (66.22%). Conclusion: Within the limitations of the present study, it can be concluded that the one step technique using polyvinlylsiloxane has comparatively fewer defects in the impression as compared to two step techniques. The most commonly seen defect in both the techniques was impression voids. Key words: Impression technique, Fixed partial denture

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