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العنوان
Single and Combined Effect of Grape Seed Extract and Nanohydroxyapatite on Remineralization of Bleached Enamel :
المؤلف
Mahmoud, Lougine Mostafa EL-Khousht.
هيئة الاعداد
باحث / لوجين مصطفي الخشت محمود
مشرف / أحمد محمود حلاوة
مشرف / نهى عبد الفتاح بركة
تاريخ النشر
2018.
عدد الصفحات
123 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
Oral Surgery
تاريخ الإجازة
1/1/2018
مكان الإجازة
جامعة عين شمس - كلية طب الأسنان - بيولوجيا الفم
الفهرس
Only 14 pages are availabe for public view

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from 122

Abstract

Tooth bleaching is one of the most famous aesthetic treatment for discolored teeth, but it comes with its set of disadvantages which include damage to the enamel surface and subsequent tooth sensitivity.
Because of that, many have searched for materials that can counteract these side effects, and since there is a general interest towards natural materials. Grape Seed Extract (GSE) has been considered in this study in addition to NanoHydroxyapatite (nHA).
For their many proven advantages in the dental field, this study was aimed to evaluate their single and combined effect of GSE and nHA on the surface and mineral content of bleached enamel using SEM and EDXA
In this study 35 maxillary first premolars were selected and used and they were divided into:
group I (Control Group):
Consisting of 2 sub-groups:
- Sub group A: 7 sound Premolars act as –ve control
- Sub group B: 7 bleached premolars act as +ve control.
group II (Experimental Group):
Consisting of 3 sub-groups; 7 bleached premolars each:
- Sub group A: teeth were treated with GSE.
- Sub group B: teeth were treated with nHA.
- Sub group C: teeth were treated with GSE followed by nHA.
The teeth were then stored in artificial saliva for 24hrs after application of the materials. The teeth were then examined with SEM and the EDXA. Results were then used to formulate the statistical results of this study.
The SEM results of the current study revealed that subgroups IIA and IIB showed less pronounced perikymata compared to subgroup IB.
It also showed partially occluded enamel rod ends (EREs) with precipitates of variable sizes scattered on the enamel surface with some of them encountered in the concavities of the EREs and some of them encountered on the rodless enamel.
SEM of the group containing GSE and nHA together (subgroup IIC) showed in some variants similar pictures to subgroups IIA&IIB but with more precipitates, while other variant showed homogenous deposition of the precipitates that covered most of the enamel surface almost occluding the EREs.
Moreover, this was confirmed by the statistical results that showed that Ca and P results of Subgroups IIA and IIB were significantly less than Subgroup IA but they didn’t significantly differ than subgroup IB taking into account that both subgroups IIA and IIB were non significantly different from each other.
On the other hand, the C results of subgroup IIA was not significantly different than subgroup IA but significantly lower than Subgroup IB. C results of subgroup IIB was significantly higher than both subgroups IA and IIA.
Meanwhile, Ca and P results of subgroup IIC showed non-significant difference to subgroup IA while it was significantly higher than subgroup IB. Ca results were significantly higher than subgroup IIB but its levels were non-significantly different to subgroup IIA, while P levels were non-significantly different than Subgroups IIA and IIB.
Moreover, C level was non-significantly different to subgroups IA and IIA, while its level was significantly lower than subgroups IB and IIB.