مقایسه‌ی تطابق مارژینال و ریزنشت ترمیم‌های CL V دندان‌های قدامی شیری با دو لاینر RMGI متفاوت

نوع مقاله : مقاله‌های پژوهشی

چکیده

مقدمه: برای کاهش ریزنشت، تکنیک‌ها و مواد مختلفی پیشنهاد شده‌اند. هدف از این مطالعه، بررسی تطابق لبه‌ای و ریزنشت ترمیم‌های کامپوزیت در دندان‌های کانین شیری با تکنیک ساندویچ به روش باز (Open sandwich) و لاینرهای متفاوت می‌باشد.
مواد و روش‌ها: این مطالعه‌ی تجربی و مقطعی در سال 1398، در دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) صورت گرفت. تعداد 60 دندان کانین شیری سالم در 3 گروه جهت انجام ترمیم کامپوزیت تقسیم شدند. در سطح باکال نمونه‌ها حفره‌ی کلاس V با فاصله‌ی 1 میلی‌متر زیر CEJ (Cementoenamel junction)، تراش داده شده و در گروه یک و دو، 1 میلی‌متر، لاینر یونوسیل و گلاس آینومر Fuji II در کف حفره قرار داده شد. سپس ترمیم با کامپوزیت 3MZ250 صورت گرفت. در گروه 3 (شاهد)، ترمیم بدون لاینر انجام شد. پس از رنگ‌آمیزی، نمونه‌ها در محلول متیلن‌بلو 0/5 درصد، مقاطع برش باکولینگوالی با ضخامت 1 میلی‌متری تهیه و بررسی ریزنشت با استریو میکروسکوپ صورت گرفت. به صورت تصادفی ساده با روش آماری Simple Random Sampling، 5 نمونه از هر گروه برای بررسی تطابق لبه‌ای با SEM (Scanning electron microscope) انتخاب گردید. برای مقایسه‌ی گروه‌های سه‌گانه از آزمون غیر پارامتریک Chi-square و Kruskal-Wallis و برای مقایسه‌ی هر گروه باهم از آزمون غیر پارامتریک Mann-Whitney استفاده شد. سطح معنی‌داری، 0/05 > p value و نرم‌افزار مورد استفاده GPower بود.
یافته‌ها: میزان ریزنشت در مارجین جینجیوالی در گروه‌های با تکنیک ساندویچ به روش باز (Open sandwich) و لاینرهای یونوسیل و Fuji II نسبت به شاهد، معنی‌دار بود (0/003 = p value). بین دو گروه یونوسیل و Fuji II تفاوت معنی‌داری مشاهده نشد (0/795 = p value). بررسی با SEM، هیچگونه تفاوت معنی‌داری بین 3 گروه در ریزنشت مارجین جینجیوالی مشاهده نگردید (0/232 = p value).
نتیجه‌گیری: استفاده از دو لاینر یونوسیل و Fuji II در حفره‌های کلاس V ترمیم شده با تکنیک Open sandwich در دندان‌های قدامی شیری می‌تواند ریزنشت لثه را کاهش دهد.
کلید واژه‌ها: ریزنشت دندانی، یونوسیل، گلاس آینومر، ترمیم دندان. 

عنوان مقاله [English]

Comparison of Marginal Compliance and Microleakage of CL V Restorations in Deciduous Anterior Teeth Using Two Different RMGI Liners

چکیده [English]

Introduction: Microleakage has always been a problem in restorative dentistry. To decrease microleakage, different restorative techniques and materials have been recommended. The purpose of this study was to evaluate micro leakage of the composite restoration in deciduous anterior teeth using the open sandwich technique by two different liners.
Materials & Methods: This cross-sectional experimental study was conducted at Khorasgan University in 2019. A total of sixty intact deciduous canine teeth were divided into 3 groups of 20. At the buccal surface of the specimens, the Class V cavity was extracted at 1 mm below the CEJ (Cementoenamel junction) and in groups 1 and 2, ionoseal liner and Fuji II ionomer glass were placed at the buccal floor. Cavities were restored with Z250 composite resin. In group 3 which served as the control, restorations was perfromed without liners. All samples are prepared for establishment after dying in methylene blue 0.5% solution. The buccal lingual incisions with a thickness of 1 mm were inspected under stereo microscope for micro leakage. A total of 5 samples were extracted from each group via random sampling to examine the marginal compliance under SEM (Scanning electron microscope). The intergroup comparisons were made using the chi-square and Kruskal-Wallis tests. Besides, intra-group comparisons were performed using the Mann-Whitney U test. All statistical procedures were performed at a significance level of less than 0.05 (p value < 0.05) using Gpower software.
Results: The outcome of this study showed that microleakage of gingival margin in open sandwich techniques with ionoseal and Fuji II (group 1, 2) was significantly higher than in control group (p value = 0.033).but in comparison between group 1,2 there was no significant difference (p value = 0.795). In SEM evaluation there was no significant difference in gingival microleakage (p value = 0.232).
Conclusion: Use of two liners: Ionoseal and Fuji II in Class V cavities restored by opensandwich technique in deciduce anterior teeth can reduce gingival microleakage.
Key words: Dental leakage, Ionoseal, Glass ionomer, Dental restoration.

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