Document Details

Document Type : Thesis 
Document Title :
EVALUATION OF THE PROTECTIVE EFFECT OF AN ORTHODONTIC SEALANT ON ENAMEL SURFACE EXPOSED TO DEMINERALIZATION AND TOOTH BRUSHING: A TRANS-MICRO RADIOGRAPHY STUDY.
تقييم الخواص الحاميه لماده تقويم اسنان عازله بعد تعرضها للاحماض و التفريش: دراسه باللأشعه السينيه الدقيقه
 
Subject : Faculty of Dentistry 
Document Language : Arabic 
Abstract : Objectives: The aim of this in-vitro study is to evaluate the efficacy of the orthodontic sealant (Opal Seal) in preventing enamel demineralization and its ability to withstand brushing abrasion Methods: In the TMR examination, 45 sound enamel blocks were divided into 3 groups; G1 (enamel with erosion), G2 (Opal seal with erosion) and G3 (Opal seal with abrasion and erosion). Brushing abrasion test was done by using a medium toothbrush with straight bristles in a brushing simulator machine under a load of 2N in a horizontal movement with 7500 strokes to test for Opal seal durability. All TMR groups were kept in a decalcifying solution for 4 days and then sectioned. TMR images were captured on a high precision x-ray glass film from all specimens using an x-ray generator (CMR2; Softex, Tokyo, Japan) to detect mineral loss and lesion depth. For the SEM-EDS examination, enamel blocks were divided into 8 groups; G1 (Opal seal without abrasion and erosion), G2 (Opal seal with abrasion), G3 (Opal seal with erosion), G4 (Opal seal with abrasion and erosion), G5 (Enamel surface without abrasion and erosion), G6, (enamel surface with abrasion), G7 (enamel surface with erosion) and G8 (enamel surface with abrasion and erosion.). Black light was first used to assess the percentage of Opal seal coverage. The chemical elements were evaluation using top surface SEM-EDS analysis to confirm the findings. Descriptive statistics and group comparison using One-Way ANOVA, Tukey post hoc test and Chi – square test were calculated. Significance level was set at p<0.05. Results: Opal seal had a significant effect and did prevent enamel demineralization p<0.05 from acid erosion but slight enamel demineralization was seen after brushing abrasion and erosion. Opal seal has good durability against brushing abrasion when corresponded to 12 months of brushing but in some samples slight dislodgement was noticed. Conclusion: Opal seal was effective in preventing enamel demineralization against the acid attack from the demineralization solution. However, slight enamel demineralization was noticed after brushing abrasion and erosion. 
Supervisor : Dr. Mona Aly Abbassy 
Thesis Type : Master Thesis 
Publishing Year : 1440 AH
2019 AD 
Co-Supervisor : Dr. Amal Linjawi 
Added Date : Monday, May 20, 2019 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
رهام محمد الغامديAl-Ghamdi, Reham MohammedResearcherMaster 

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