@article{Leelanusorn_Putthipat_2021, title={Vickers Microhardness Comparison of Zirconomer Improved, Giomer and Composite Resin}, volume={46}, url={https://he02.tci-thaijo.org/index.php/JDMS/article/view/253564}, abstractNote={<p><strong>Background</strong>: Zirconomer improved is new glass ionomer cement formulations, reinforced zirconia in glass ionomer cements to increase strength, durability and fluoride releasing. Nano zirconia is higher translucency for a closer match to natural tooth. It may be ideal for permanent posterior restoration in patients who concern aesthetic properties and high caries incidence.<strong>Objective</strong>: To evaluate and compare surface hardness of zirconomer improved with composite resin and giomer.<strong>Methods</strong>: In this study, 45 disc-shaped experimental specimens were made from three different tooth colored restoration. All specimens were loaded on their surfaces at 1 hour, 24 hours and 7 days. The obtained data were analyzed by one-way ANOVA method (p <0.05).<strong>Result</strong>: There was no statistically significant difference of surface hardness between composite resin and giomer over storage time. Surface hardness of zirconomer improved was increased with time and highest 76.82 kg/mm2 at 7 days. There was statistically difference of Vickers hardness of zirconomer improved over storage time. There was statistically difference of significant surface hardness among the materials studied over storage time.<strong>Conclusion</strong>: Zirconomer improved showed higher surface hardness than resin composite at 7 days. Zirconomer improved showed lowest surface hardness at 1 h and increased with time.</p>}, number={2}, journal={Journal of The Department of Medical Services}, author={Leelanusorn, Natthira and Putthipat, Nongwipa}, year={2021}, month={Sep.}, pages={76–82} }