Assessment of effect of Different Impression Techniques on Dimensional Accuracy of Implant Definitive Casts: A Comparative Study
Journal Title: Journal of Advanced Medical and Dental Sciences Research - Year 2017, Vol 5, Issue 12
Abstract
Background: A passively fitting prosthesis is considered an essential prerequisite for maintaining osseointegration. This is related to the fact that dental implants, unlike natural teeth, lack the cushioning effect of periodontal fibers and cannot completely accommodate the demands of the superstructure.Aim: To comparatively evaluate the effect of different impression techniques on dimensional accuracy of implant definitive casts.Materials and method: The present study was conducted in the Department of Prosthodontics of the dental institution. For the study, a stainless steel model of maxillary arch with 4 internal connection implants with 4 mm diameter and 10.5 mm length in maxillary right canine (implant no: 1) lateral incisors (implants no: 2 and 3) and left first premolar (implant no: 4) areas were used. In this study, impressions were made via two techniques: Open tray with long impression copings and closed tray with short impression copings. To evaluate the accuracy of each impression technique, centers of implants on the master model were located in three dimensions and compared with the centers in the experimental casts. Results: We observed mean displacement of Implant no. 2 with technique 1 was 0.06 and technique 2 was 0.07. Mean displacement of Implant no. 3 with technique 1 was -0.04 and technique 2 was 0.16. Mean displacement of Implant no. 3 with technique 1 was 0.03 and technique 2 was 0.29.Conclusion: Within the limitations we conclude that there is no significant difference between open and closed tray impression technique on dimensional accuracy of implant definitive casts.
Authors and Affiliations
Nausheen Jajira, Rajat Khajuria, Sidhant Sudan, Tanvi Sudan, Priyanka Choudhary, Gurjot Sodhi
Keywords
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