Year : 2016

Volume : Volume 6

Issue : Issue 3

Address for correspondence :
Dr. Prashanth Patil
drpatil3feb@yahoo.com

Abstract

Aim:  To compare and evaluate the accuracy of two different implant transfer impression techniques.  Materials and Method:  A resin master model with 3 implants in place of the maxillary left lateral incisor to first molar was fabricated. Impressions were made by direct and snap on impression techniques using polyether impression material. After impression making, all the casts were poured in dental stone. Linear changes between the inter abutment distance of all the master casts were quantified using a profile projector. The data were analyzed statistically using Wilcoxon’s signed rank test (Iintra group comparisons) & Mann-whitney test (Interogroup conversions). For the entire test a p<0.05 was considered for statistical significance. Results: The results showed significant deviations between master casts of 2 groups and master model (except for inter abutment distance and also in between the groups) with P < 0.05.  Clinically these deviations were not significant as the values are within the accepted range. Conclusion: The master casts obtained by using “direct impression” technique showed significantly less deviation from the “Snap-on impression” technique but clinically the deviations are within the accepted range.  The positional accuracy of snap on impression technique was clinically acceptable.

Keywords: Dental Implants, Direct Impression Technique, Snap-on Impression Technique, Impression Material.