دورية أكاديمية
Composite Replacement of Amalgam Restoration Versus Freshly Cut Dentin: An In Vitro Microleakage Comparison.
| العنوان: | Composite Replacement of Amalgam Restoration Versus Freshly Cut Dentin: An In Vitro Microleakage Comparison. |
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| المؤلفون: | Redwan H, Bardwell DN, Ali A, Finkelman M, Khayat S, Weber HP |
| المصدر: | Operative dentistry [Oper Dent] 2016 May-Jun; Vol. 41 (3), pp. E73-82. Date of Electronic Publication: 2016 Feb 26. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Univ. of Washington, School of Dentistry Country of Publication: United States NLM ID: 7605679 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1559-2863 (Electronic) Linking ISSN: 03617734 NLM ISO Abbreviation: Oper Dent |
| أسماء مطبوعة: | Original Publication: Seattle, Univ. of Washington, School of Dentistry. |
| مواضيع طبية MeSH: | Dental Leakage* , Dental Restoration, Permanent* , Dentin-Bonding Agents*, Composite Resins ; Dental Cavity Preparation ; Dentin ; Humans ; Materials Testing |
| مستخلص: | Objective: The aim of this study was to evaluate the microleakage of the composite restorations when bonded to tooth structure previously restored with amalgam material compared with that of freshly cut dentin. Methods and Materials: Thirty intact, extracted intact human molars were mounted in autopolymerizing acrylic resin. Class II box preparations were prepared on the occluso-proximal surfaces of each tooth (4-mm bucco-lingual width and 2-mm mesio-distal depth) with the gingival cavosurface margin 1 mm above the CEJ. Each cavity was then restored using high copper amalgam restoration (Disperalloy, Dentsply) and then thermocycled for 10,000 thermal cycles. Twenty-five of the amalgam restorations were then carefully removed and replaced with Filtek Supreme Ultra Universal (3M ESPE); the remaining five were used for scanning electron microscopy and energy dispersive x-ray spectroscopy analysis. A preparation of the same dimensions was performed on the opposite surface of the tooth and restored with composite resin and thermocycled for 5000 thermal cycles. Twenty samples were randomly selected for dye penetration testing using silver nitrate staining to detect the microleakage. The specimens were analyzed with a stereomicroscope at a magnification of 20×. All of the measurements were done in micrometers; two readings were taken for each cavity at the occlusal and proximal margins. Two measurements were taken using a 0-3 scale and the percentage measurements. Results: Corrosion products were not detected in either group (fresh cut dentin and teeth previously restored with amalgam). No statistically significant difference was found between the microleakage of the two groups using a 0-3 scale at the occlusal margins (McNemar test, p=0.727) or proximal margins (Wilcoxon signed-rank test, p=0.174). No significance difference was found between the two groups using the percentage measurements and a Wilcoxon signed-rank test at either the occlusal (p=0.675) or proximal (p=0.513) margins. However, marginal microleakage was statistically significant between the proximal and occlusal margins (p<0.001). Conclusion: Within the limitations of this in vitro study, no significant difference was found between the microleakage of nondiscolored dentin in teeth that were previously restored with amalgam compared with freshly cut dentin. However, marginal microleakage in the proximal surface was higher than that in the occlusal surface. |
| المشرفين على المادة: | 0 (Composite Resins) 0 (Dentin-Bonding Agents) |
| تواريخ الأحداث: | Date Created: 20160227 Date Completed: 20180323 Latest Revision: 20181202 |
| رمز التحديث: | 20231215 |
| DOI: | 10.2341/14-278-L |
| PMID: | 26918923 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1559-2863 |
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| DOI: | 10.2341/14-278-L |