Document Details
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Document Type |
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Thesis |
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Document Title |
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EVALUATION OF ENAMEL DEMINERALIZATION USING DIFFERENT ORTHODONTIC INTERPROXIMAL RE-DUCTION TECHNIQUES: TMR ANALYSIS تقييم زوال التمعدن من مينا الاسنان بإستخدام مختلف تقنيات اختزال اسطح المينا التلاصقيه في علاج تقويم الاسنان: تحليل مخطاط مكروي باستخدام الاشعة السينية |
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Subject |
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Faculty of Dentistry |
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Document Language |
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Arabic |
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Abstract |
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Objective: Interproximal enamel reduction (IPR) is a common clinical approach in orthodontics. The aim of this investigation was to determine the acid resistance of enamel after IPR and after polishing using transverse microradiography (TMR) technique.
Materials and Methods: Seventy five premolar and molar extracted human teeth were divided into 5 groups (n=15): Group 1, manual IPR (New Metal Strips®, GC, Tokyo, Japan); Group 2, rotary IPR (IPR File system®, Ortho Direct, St Ann, MO, USA); Group 3, rotary IPR and subsequent polishing using the polishing tips included in the kit; Group 4, manual IPR and subsequent polishing using finishing strips (Sof-Lex® Finishing Strips, 3M, Minn, USA); and Control group, intact enamel surfaces. After IPR and acid challenge, enamel slices of 100-140 μm were prepared. For TMR analysis, all specimens were exposed to high dosage of x-rays generated from x-ray generator (SRO-M50; Sofron, Tokyo, Japan). Images for all specimens were captured on sensitive x-ray films (HRP-SN-2; Konica Minolta, Tokyo, Japan). ∆Z and LD were calculated from the X-rays images with special software. One-way analysis of variance (ANOVA) was performed to evaluate the effect of IPR and subsequent polishing on proximal enamel surface. The Tukey post hoc test was used to compare between the groups at P < 0.05.
Results: Statistically significant differences (P<0.05) were observed in mineral loss among groups 1 and 2 compared to control group while differences were statistically insignificant (P<0.05) between group 3, group 4 and control group. Similarly, statistically significant differences (P<0.05) were observed in lesion depth among groups 1 and 2 compared to control group while differences were statistically insignificant (P<0.05) between group 3, group 4 and control group.
Conclusion: IPR is an extremely sensitive procedure that should be only conducted when indicated. Proper polishing of the proximal enamel surfaces after IPR is an important step that should be conducted according to manufacturers’ instructions and cannot be skipped. |
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Supervisor |
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Dr. Mona Abbassy |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1442 AH
2020 AD |
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Added Date |
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Sunday, January 17, 2021 |
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Researchers
| وليد احمد الفيفي | Alfaifi, Waleed Ahmed | Researcher | Master | |
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