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VOLUME 13 , ISSUE 2 ( March-April, 2012 ) > List of Articles

RESEARCH ARTICLE

Relating the Marginal Fit of the Castings to the Accuracy of the Impressions made from Laminated Hydrocolloid Impression Technique: A Comparative Study

Manish Sinha, Bhavana Thakur, Ajay Gaikwad, Lalitkumar Dnyandeo Chaudhari, Adwait Kulkarni, Harshal Kulkarni

Citation Information : Sinha M, Thakur B, Gaikwad A, Chaudhari LD, Kulkarni A, Kulkarni H. Relating the Marginal Fit of the Castings to the Accuracy of the Impressions made from Laminated Hydrocolloid Impression Technique: A Comparative Study. J Contemp Dent Pract 2012; 13 (2):167-172.

DOI: 10.5005/jp-journals-10024-1115

Published Online: 01-10-2012

Copyright Statement:  Copyright © 2012; The Author(s).


Abstract

Aim

Relating the marginal fit of the castings, to the accuracy of the impression produced using laminated hydrocolloid impression technique, alginate and double-mixed polyvinyl siloxane. Basic objective of the study is to check the feasibility of the use of laminated hydrocolloid impression technique in the fixed partial denture.

Materials and methods

The precisely machined metal die was designed to simulate standard complete metal crown preparation. The preparation was mounted on cylindrical base of 20 mm length and diameter of 10 mm. Seven impressions were made from the each impression material onto the metal die, and total 21 impressions were obtained from all three impression materials, which were poured by the die stone, and stone die was prepared. Wax patterns were fabricated on stone dies obtained from each impression and then casting was done. All the castings were checked for the marginal fit on metal die after applying a uniform standardized load of 30 pounds using measuring microscope.

Results

Result revealed that the marginal fit of the castings obtained from group II (laminated hydrocolloid technique) and group III (double-mix polyvinyl polysiloxane) did not show the significant difference between the two of them. Marginal gap of the castings obtained from group I are significantly greater in comparison to the castings obtained from groups II and III (p < 0.01).

Conclusion

Group II (laminated hydrocolloid technique) impression material may be the choice of many clinicians over group III (double-mix polyvinyl polysiloxane) impression material. Group I (alginate impression material), though very cost-effective and easy to handle may not able to produce accurate results.

Clinical significance

The study gives overview of the best impression material that can be used clinically. Laminated hydrocolloid technique is the technique of choice.

How to cite this article

Sinha M, Thakur B, Gaikwad A, Chaudhari LD, Kulkarni A, Kulkarni H. Relating the Marginal Fit of the Castings to the Accuracy of the Impressions made from Laminated Hydrocolloid Impression Technique: A Comparative Study. J Contemp Dent Pract 2012;13(2):167-172.

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