International Archives of Integrated Medicine (IAIM)
Source ID: 00000561Volume 7, Issue 5, May,2020, 1-13,Page Count - 13
Effect of Nano-Hydroxyapatite Bleaching on Human Enamel Surface
Rasha Ramadan Basheer (1) Mohamed Riad Farid (2) Faten Kamel (3) Rania Sayed Mosallam (4)(1) Associate Professor of Operative Dentistry, Restorative Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia.
(2) Professor of Operative Dentistry, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
(3) Professor of Operative Dentistry, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
(4) Professor of Operative Dentistry, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
Manuscript ID:-00001-67330
Access Type : Open Access
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Cite this article:Rasha Ramadan Basheer,Mohamed Riad Farid,Faten Kamel,Rania Sayed Mosallam,
Effect of Nano-Hydroxyapatite Bleaching on Human Enamel Surface,
International Archives of Integrated Medicine
(IAIM),
2020,
7(5),
PP1-13
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Abstract
Objectives: This in vitro study was designed to investigate the effect of bleaching with nanohydroxyapatite material on human enamel in term of surface elemental alterations.
Materials and methods: A total of 240 intact non carious human premolars, extracted for orthodontic reasons, were used. Enamel blocks of uniform dimensions (4 mm×4 mm×3 mm) were prepared from the middle third of buccal halves of each tooth. The dental blocks were individually embedded in selfcuring colorless acrylic resin. With the external enamel surface exposed for different applications. The dental blocks were randomly divided into two equal groups (n=120), according to the application of the bleaching agent, i.e. either not subjected to bleaching agent (distilled water as control group) or subjected to hydrogen peroxide bleaching agent. Each group was further subdivided into two equal subgroups of 60 specimens each, according to the application of nano-hydroxyapatite. The groups were designed as follows: Group (DW) distilled water; group (HP) hydrogen peroxide; group (HA+DW) nano-hydroxyapatite with distilled water and group (HA+HP) nano-hydroxyapatite with hydrogen peroxide. The materials used in this study were, hydrogen peroxide bleaching agent (Opalescence extra boost 38%) used as recommended by the manufacturer`s instructions, nanohydroxyapatite material (nhap), mixture between hydrogen peroxide and nhap, and distilled water used as a control group. Samples were evaluated for elemental composition changes using Scanning Electron Microscope and Energy Dispersive X-Ray Spectroscopy (EDS). The elemental composition changes of the enamel surface were calculated for each sample. The data were statistically analyzed using Kruskal-Wallis test was used to compare between the four groups. Mann-Whitney U test was used for pair-wise comparisons between the groups when Kruskal-Wallis test was significant. Friedman`s test was used to study the changes by time within each group. Wilcoxon signed-rank test was used for pair-wise comparisons between the time periods when Friedman`s test was significant.
Results: The results revealed regarding the Calcium weight loss there was a statistically significant difference between the groups as HP group showed the highest Ca wt% loss, HA+DW group, HA+HP group then DW group respectively. Regarding phosphate wt% loss there was a statistically significant difference between the groups, however HA+DW group showed the highest mean value increase, then HA+HP group, HP group, DW group showed no significant differences between them.
Conclusions: Under the limitations of this study, several conclusions could be detected: Adding nano-hydroxyapatite material to peroxide bleaching agents could decrease its detrimental effect on tooth surface and The remineralizing potential of artificial saliva is limited, as it may not repair the whole tooth surface demineralization caused by bleaching agents.
Author Keywords
Nano-hydroxyapatite Bleaching Elemental analysis Demineralization Spectroscopy
| ISSN Print:2394-0026 | ISSN Online: 2394-0034 |
| Source Type: Journals | Document Type: Journal Article |
| Publication Language: English | DOI: |
| Abbreviated Journal Title: IAIM | Access Type: Open Access |
| Publisher Name: Educational Society for Excellence | Resource Licence: |
| Major Subject:Health Sciences | Subject Area classification: Dentistry |
| Subject area: General Dentistry | Source:SCOPEDATABASE |
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