Abstract
AimTo evaluate and compare shear bond strength of various glass ionomer cements (GICs) to dentin of primary teeth.Materials and methodsSample size taken for the study was 72 deciduous molars with intact buccal or lingual surfaces. Samples were randomly divided into three groups, i.e., groups A, B, and C and were restored with conventional type II GIC, type II light cure (LC) GIC, and type IX GIC respectively. Thermocycling was done to simulate oral conditions. After 24 hours, shear bond strength was determined using Instron Universal testing Machine at crosshead speed of 0.5 mm/ minute until fracture. Results were tabulated and statistically analyzed.ResultsIt was found that the shear bond strength was highest in group B (LC GIC) 9.851 ± 1.620 MPa, followed by group C (type IX GIC) 7.226 ± 0.877 MPa, and was lowest in group A (conventional GIC) 4.931 ± 0.9735 MPa.ConclusionLight cure GIC was significantly better than type IX GIC and conventional GIC in terms of shear bond strength.How to cite this articleSomani R, Jaidka S, Singh DJ, Sibal GK. Comparative Evaluation of Shear Bond Strength of Various Glass Ionomer Cements to Dentin of Primary Teeth: An in vitro Study. Int J Clin Pediatr Dent 2016;9(3):192-196.
Highlights
The human tooth is a marvel of nature
It was found that the shear bond strength was highest in group B (LC glass ionomer cements (GICs)) 9.851 ± 1.620 MPa, followed by group C 7.226 ± 0.877 MPa, and was lowest in group A 4.931 ± 0.9735 MPa
Light cure GIC was significantly better than type IX GIC and conventional GIC in terms of shear bond strength
Summary
The human tooth is a marvel of nature. It has a limited capacity for regeneration. The glass ionomer cement (GIC) was developed with the objective to produce a restorative material that would possess the desirable properties of silicate cements and polycarboxylate cement. Conventional GICs have certain properties that make them useful as a restorative material of choice. The physical and mechanical properties of GIC were further improved when a resin portion was added to the original GIC which yielded a hybrid material, i.e., resin modified glass ionomer cement (RMGICs).[4] It was developed to overcome the problems of moisture sensitivity and low initial mechanical strengths typical for conventional glassionomers
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