EFFICACY OF HYDROXYAPATITE NANOPARTICLES IN DENTINAL TUBULE OCCLUSION AND RESISTANCE TO EROSIVE WEAR (SCANNING ELECTRON MICROSCOPIC STUDY) | ||
| Alexandria Dental Journal | ||
| Article 15, Volume 49, Issue 1, April 2024, Pages 57-65 PDF (426.92 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2023.211107.1379 | ||
| Authors | ||
| Mayar Hassaan* 1; Nagah Rashad2; Afaf El Sawa3; Aya Sedik4 | ||
| 1Demonstrator of Oral Biology, Faculty of Dentistry, Arab Academy for Science, Technology & Maritime Transport, Egypt. | ||
| 2Professor of Oral Biology, Department of Oral Biology, Faculty of Dentistry, Alexandria University, Egypt. | ||
| 3Professor, Department of Oral Biology, Faculty of Dentistry, Alexandria University, Egypt | ||
| 4Lecturer of Oral Biology, Department of Oral Biology, Faculty of Dentistry, Alexandria University, Alexandria, Egypt | ||
| Abstract | ||
| Introduction: Dentin hypersensitivity (DH) is a major dental problem that is manifested as sharp pain of short duration. The cause of DH is controversial; however, the most accepted theory is the hydrodynamic theory. Attempts were made for the treatment of DH as fluoride containing-toothpastes and mouthwashes. Recently, it was found that nanoparticles maybe used for the treatment of DH as they are biocompatible and bioactive materials. Objectives: To investigate the efficacy of hydroxyapatite nanoparticles in occluding dentinal tubules and resisting erosive wear. Methodology: Twenty-seven teeth, extracted for orthodontic purpose were used in the present study to obtain 27 dentin discs. Dentin discs were prepared by slicing the teeth from the mid-coronal part. Dentin discs were etched with 37% orthophosphoric acid for 20 seconds then washed with distilled water for 1 minute. Afterwards, they were randomly divided into 2 groups: Group I (Etched control), Group II (Hydroxyapatite nanoparticles): the etched dentin discs were treated with hydroxyapatite nanoparticles. After 7 days, Group II was divided into 2 subgroups; subgroup A: stored in artificial saliva and subgroup B: subjected to erosive challenge by 0.3% citric acid. Finally, dentin discs were analyzed by scanning electron microscope (SEM) and energy dispersive x-ray (EDX). Results: Group II-A showed more occluded dentinal tubules compared to group I and group II-B. The results of the EDX showed increase in calcium and phosphorous percentage in Group II-A than groups I and II-B. Conclusion: Hydroxyapatite nanoparticles may be a promising treatment for dentin hypersensitivity. Keywords: dentin hypersensitivity, hydroxyapatite nanoparticles, dentin. | ||
| Keywords | ||
| dentin hypersensitivity; hydroxyapatite nanoparticles; dentin | ||
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