Journal of Conservative Dentistry
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Year : 2002  |  Volume : 5  |  Issue : 1  |  Page : 32-37

Etch Patterns Following Application Of Phosphoric Acid And Self Etching Primer On Human Enamel And Dentin – An SEM Study



Correspondence Address:
Sudhin Kurian Thomas


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Traditional enamel conditioning steps include acid etching water rinsing air-drying application of bonding agent. These steps could be simplified by the use of hydrophilic acid monomers capable of etching and penetrating the dentin simultaneously. Monomers with these properties are used as self-etching primers in various dentin adhesives. The aim of this study was to compare the etch pattern of a self-etching primer and that of 37% phosphoric acid on human enamel and dentin. Sixteen central incisors were selected for the study. They were divided into two groups: Group 1- consisted of 8 specimens for analysis of enamel etch patterns Group 2-consisted of 8 specimens for analysis of dentin etch patterns. The specimens were subdivided into two groups of 4 specimens each. Subgroup A : 37% phosphoric acid Subgroup B : Self etching primer After the etching treatment the specimens were analyzed under SEM. The SEM analysis showed that 37% phosphoric acid showed distinct etch patterns on enamel and dentin. The self-etching primer, on dentin showed open dentinal tubules and tubules occluded by the primer component. The effect of the self-etching primer on enamel was not comparable with that of phosphoric acid.


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