Submitted: 29 May 2021
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Accepted: 05 Sep 2021
ePublished: 29 Mar 2022
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Avicenna J Dent Res. 2022;14: 20-24.
doi: 10.34172/ajdr.2022.04
  Abstract View: 57
  PDF Download: 40

Original Article

In Vitro Effect of Strontium-Doped 45S5 Bioglass and Nd:YAG Laser on Microhardness of Demineralized Enamel

Bahareh Asgartooran 1*, Erfan Akbari 2, Loghman Rezaei-Soufi 1, Roya Najafi-Vosough 3

1 Department of Restorative Dentistry, Dental School, Hamedan University of Medical Sciences, Hamedan, Iran
2 Dentist
3 Department of Biostatistics and Epidemiology, School of Public Health, Hamedan University of Medical Sciences, Hamedan, Iran
*Corresponding Author: *Corresponding author: Bahareh Asgartooran, Assistant Professor, Dental School of Hamedan University of Medical Sciences, Besat Boulevard, Hamadan, Iran, 65176-59114, Tel:+98-8138381086, Email: , Email: basgartooran@yahoo.com


Background: This study aimed to assess the effect of strontium-doped 45S5 bioglass (BG) and Nd:YAG laser on the microhardness of demineralized enamel.

Materials and Methods: In this in vitro, experimental study, 65 sound enamel samples were prepared of human premolars and polished, and then immersed in a demineralizing solution for 10 weeks. The samples were randomly divided into 5 groups of control, BG, laser, laser plus BG, and BG plus laser. Two samples of each group underwent assessment of surface morphology under a scanning electron microscope. Finally, the microhardness of samples was measured using a Vickers hardness tester, and data were analyzed by ANOVA.

Results: The mean microhardness of the BG group was significantly higher than that of other groups (P<0.05). The lowest microhardness was noted in the control group. The difference in microhardness was significant between laser and laser plus BG groups (P<0.05). Further, the BG plus laser group had a significant difference in microhardness with BG and control groups (P<0.05). The difference between laser plus BG and control groups was also significant in this respect (P<0.05). Eventually, maximum morphological changes were observed in the BG group.

Conclusions: Overall, BG seems to be effective for the treatment of incipient enamel caries. It effectively increases enamel microhardness and decreases mineral loss while preserving the integrity of the enamel surface.

Keywords: Bioactive glass, Laser, Enamel, Microhardness, Caries

Please cite this article as follows: Asgartooran B, Akbari E, Rezaei-Soufi L, Najafi-Vosough R. In vitro effect of strontium-doped 45s5 bioglass and nd:yag laser on microhardness of demineralized enamel. Avicenna J Dent Res. 2022; 14(1):20-24. doi:10.34172/ajdr.2022.04
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