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Research Article | Volume 23 Issue 1 (Jan - Mar, 2024) | Pages 100 - 109
A Comparative Evaluation of Dimensional Accuracy of Different Elastomeric Impression Techniques- In Vitro Study
 ,
1
Department of Prosthodontics and Crown and Bridge, Rama Dental College, Hospital and Research Centre, Kanpur, U.P., India
2
Professor, Department of Pediatric and Preventive Dentistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India
Under a Creative Commons license
Open Access
Received
Jan. 2, 2024
Revised
Feb. 22, 2024
Accepted
March 10, 2024
Published
April 20, 2024
Abstract

Introduction: Impression-making is one of the most crucial steps involved in the fabrication of prostheses and is of paramount importance in the success of the dental restoration. Methods: A dentate maxillary arch of an acrylic resin typodont was used as the master model in this in vitro study. Sharply defined pits were made on selected locations on ivorine teeth on the model and each made twenty samples of the four impression techniques. The casts were obtained in die stones and based on different impression techniques four groups were created: Group A: Single-step putty wash technique, Group B: Twostep putty wash technique, Group C: Multiple-mix technique, and Group D: Single mix technique. A coordinate measurement device was used to evaluate distances between the pits. The significance (Q-value) of the mean difference of different techniques from the dimensions on the dentate maxillary arch was compared using Dunnett’s multiple comparison q-test after performing the ANOVA test. Results: There was no similarity between the dentate maxillary arch and the casts obtained in the 3-dimensional measurements. Impressions were marginally large in the horizontal dimension and slightly small in the vertical dimension. Conclusion: The multiple-mix technique was the most precise and the single-step putty wash technique had the least accuracy

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