A COMPARATIVE EVALUATION OF MICROLEAKAGE OF TWO LOW-SHRINKAGE COMPOSITES WITH A CONVENTIONAL RESIN COMPOSITE: AN IN VITRO ASSESSMENT

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TAVANGAR MARYAM; TAYEFEHDAVALLOO REZA; DARABI FARIDEH; KARAMBIN MAHSA; KAZEMI REZA

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Journal: JOURNAL OF DENTISTRY (SHIRAZ UNIVERSITY OF MEDICAL SCIENCES) Year:2016 | Volume:17 | Issue:1 Page(s): 55-61

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Title

A COMPARATIVE EVALUATION OF MICROLEAKAGE OF TWO LOW-SHRINKAGE COMPOSITES WITH A CONVENTIONAL RESIN COMPOSITE: AN IN VITRO ASSESSMENT

Author(s)

Keywords

RESIN COMPOSITES

DENTAL BONDING

MICROLEAKAGE

Abstract

Statement of the Problem: Polymerization shrinkage stress in composite restorations may lead to MICROLEAKAGE. Clinical methods such as using low-shrinkage composites have been suggested to overcome this problem; however, there are controversies about their efficiency in decreasing the MICROLEAKAGE.Purpose: This in vitro study was conducted to compare the MICROLEAKAGE of two lowshrinkage RESIN COMPOSITES with a conventional one.Materials and Method: Fifty class V cavities of 2.5×3×2 mm (depth× length× width) were prepared in the buccal surfaces of intact bovine incisor teeth with the incisal margin on the enamel and gingival margin on the cementum. The teeth were randomly divided into 5 groups. In group 1, Clearfil APX (conventional) with SE Bond was used in 2 layers (Kuraray; Japan). In group 2, GC Kalore (low –shrinkage) with GC UniFil Bond was applied in one layer (GC Company). In group 3, the material of group 2 was applied in two layers. In group 4, FiltekP90 (low –shrinkage) with P90 System adhesive was applied in one layer (3M ESPE). In group 5, the materials of group 4 were applied in two layers. The samples were thermocycled and immersed in 0.5% fuchsin solution for 24h. The restorations were sectioned in buccolingual direction.Then they were evaluated for MICROLEAKAGE by using a stereomicroscope and scored as 0, 1, 2, and 3 and then Kruskal-Wallis test was used (p<0.05).Results: The groups were not significantly different regarding the MICROLEAKAGE in the coronal and cervical margins (p<0.423 and p<0.212, respectively); however, the Filtek P90 yielded the best results. In all groups, except group 5 (p=0.018), the cervical margins had greater MICROLEAKAGE than the coronal margins.Conclusion: The results suggested that low-shrinkage RESIN COMPOSITES may not reduce the marginal MICROLEAKAGE. The proper use of conventional RESIN COMPOSITES may offer comparable clinical results.

Cites

Effect of Trypsin/EDTA Conditioning on Marginal Microleakage of Class V Composite Restorations Bonded With a One-Step Self-etch Adhesive

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APA: Copy

TAVANGAR, MARYAM, TAYEFEHDAVALLOO, REZA, DARABI, FARIDEH, KARAMBIN, MAHSA, & KAZEMI, REZA. (2016). A COMPARATIVE EVALUATION OF MICROLEAKAGE OF TWO LOW-SHRINKAGE COMPOSITES WITH A CONVENTIONAL RESIN COMPOSITE: AN IN VITRO ASSESSMENT. JOURNAL OF DENTISTRY (SHIRAZ UNIVERSITY OF MEDICAL SCIENCES), 17(1), 55-61. SID. https://sid.ir/paper/673733/en

Vancouver: Copy

TAVANGAR MARYAM, TAYEFEHDAVALLOO REZA, DARABI FARIDEH, KARAMBIN MAHSA, KAZEMI REZA. A COMPARATIVE EVALUATION OF MICROLEAKAGE OF TWO LOW-SHRINKAGE COMPOSITES WITH A CONVENTIONAL RESIN COMPOSITE: AN IN VITRO ASSESSMENT. JOURNAL OF DENTISTRY (SHIRAZ UNIVERSITY OF MEDICAL SCIENCES)[Internet]. 2016;17(1):55-61. Available from: https://sid.ir/paper/673733/en

IEEE: Copy

MARYAM TAVANGAR, REZA TAYEFEHDAVALLOO, FARIDEH DARABI, MAHSA KARAMBIN, and REZA KAZEMI, “A COMPARATIVE EVALUATION OF MICROLEAKAGE OF TWO LOW-SHRINKAGE COMPOSITES WITH A CONVENTIONAL RESIN COMPOSITE: AN IN VITRO ASSESSMENT,” JOURNAL OF DENTISTRY (SHIRAZ UNIVERSITY OF MEDICAL SCIENCES), vol. 17, no. 1, pp. 55–61, 2016, [Online]. Available: https://sid.ir/paper/673733/en

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