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CC BY 4.0 · Eur J Dent 2025; 19(02): 389-398
DOI: 10.1055/s-0044-1789003
Original Article

Evaluation of Mechanical and Elemental Properties of Bioceramic-Coated Orthodontic Brackets and Enamel Surface

Abdul Samad Khan 
1   Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
,
Ahlam AlAbdali
2   College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
,
Nadia Irshad
3   Department of Dental Materials, Sharif Medical and Dental College, Lahore, Pakistan
,
Othoob AlMusayyab
2   College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
,
Norah AlQahtani
2   College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
,
Asma Tufail Shah 
4   Interdisciplinary Research Centre in Biomedical Materials, COMSATS University Islamabad, Lahore Campus, Pakistan
,
Sultan Akhtar
5   Department of Biophysics, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
,
Yassine Slimani
5   Department of Biophysics, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Abstract

Objective The aim is to coat orthodontic brackets with two different bioactive materials and to compare the mechanical and morphological properties of coated brackets and tooth surfaces.

Materials and Methods A total of 120 stainless steel brackets were divided equally into three groups, that is, the uncoated brackets and nanohydroxyapatite (nHA)-coated, and nanobioactive glass (nBG)-coated brackets using a spin coater machine. The brackets were bonded on the enamel surface and underwent remineralization/demineralization cycles for days 1, 7, 14, and 30. At each time interval, the bond strength of the brackets was assessed using mechanical loading. An optical and scanning electron microscope (SEM) were used for surface evaluation, and the adhesive remanent index (ARI) values were obtained and quantified.

Statistical Analysis One-way analysis of variance using Tukey's test was used to compare the differences among the groups.

Results A uniform distribution of nanoparticles occurred on the surfaces of brackets. The shear bond strength (SBS) showed no significant differences in any tested groups on days 1, 7, and 14. However, control and nBG showed a significant difference from nHA at day 30. On days 7, 14, and 30, the nHA group showed the highest SBS values among the groups. For ARI, most samples showed an adhesive nature of failure at the enamel–brackets interface. The images confirmed the presence of coated particles on brackets and remnants of adhesives after SBS.

Conclusion This study confirmed that the nHA- and nBG-coated brackets have a high potential for application in orthodontics regarding structural and mechanical properties.

Keywords

dental - white spots - orthodontic brackets - orthodontic adhesives - hydroxyapatite - bioactive glass - spin coating - shear strength

Supplementary Material



Publikationsverlauf

Artikel online veröffentlicht:
18. September 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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