An in-vitro study to compare the microhardness of glass ionomer cement set conventionally versus set under ultrasonic waves

FA Baloch; AJ Mirza; D Baloch

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Original Article

4 (

); 149-155

An in-vitro study to compare the microhardness of glass ionomer cement set conventionally versus set under ultrasonic waves

FA Baloch, AJ Mirza, D Baloch

Received: 2010-11-10, Accepted: 2010-11-10, Published: 2010-11-19

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This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, transform, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

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This article was originally published by Qassim University and was migrated to Scientific Scholar after the change of Publisher.

Abstract

Abstract: Objective: To assess the difference of surface hardness of glass ionomer cement (GIC) set by conventional setting method and under ultrasonically energized method. Method: 20 cylindrical samples measuring 2.5mm (diameter) and 5mm (length) were prepared with type IX GIC. Ten of these samples were allowed to set by conventional setting method and other ten were set under ultrasonic excitation energy. After finishing and polishing of the samples, three indentations were made on each sample using Vicker`s hardness machine with a load of 300 gm for 15 seconds. The surface microhardness of the indents was calculated by Vicker`s hardness formula. Results: Surface microhardness of samples set by ultrasound setting method was significantly higher than samples set by conventional method. Conclusion: This can be beneficial for the dental patients as when used as a restorative material, it will have a long lasting effect and can also be used in posterior load bearing areas.