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CC BY-NC-ND 4.0 · Journal of Health and Allied Sciences NU 2017; 07(01): 025-028
DOI: 10.1055/s-0040-1708691
Original Article

Evaluation of Polymerization shrinkage of 2 types of posterior composite resins

Lakshmi Nidhi Rao
1   Lecturer, A.B. Shetty Memorial Institute of Dental Sciences, Deralakatte, Mangalore
,
Mithra N. Hegde
2   Vice-Principal, Senior Professor and Head of the Department, A.B. Shetty Memorial Institute of Dental Sciences, Deralakatte, Mangalore
,
Aditya Shetty
3   Add. Professor, Department of Conservative Dentistry and Endodontics, A.B. Shetty Memorial Institute of Dental Sciences, Deralakatte, Mangalore
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Abstract

Composite resins represent a class of material widely used in restorative dentistry, not only for anterior aesthetics but also as the first choice to restore posterior teeth. However the key limitation in the use of composite resins as a restorative material is related to shrinkage during polymerization which leads to poor marginal seal, marginal staining, restoration displacement, tooth fracture and recurring caries [1].

Polymerization shrinkage may affect negatively the clinical outcome of the restoration. Hence the present study evaluates the Polymerization shrinkage of 2 different posterior composites; Filtek Z350(3M) and everX Posterior(GC), using a pycnometer.

Independent Sample T-Test was used to determine statistically significant difference in volumetric shrinkage among the tested composite resins. everX Posterior showed comparatively less shrinkage than Filtek Z350; which can be attributed to the presence of silanated e-glass fibres.

Keywords

Composite - Polymerization shrinkage - Pycnometer


Publication History

Received: 02 February 2017

Accepted: 18 February 2017

Article published online:
22 April 2020

© .

Thieme Medical and Scientific Publishers Private Ltd.
A-12, Second Floor, Sector -2, NOIDA -201301, India

 

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