A 3-year retrospective study of clinical durability of bulk-filled resin composite restorations

Clinical Relevance When placing a Class II resin composite restoration, the use of sectional matrix systems and separation rings to obtain tight proximal contacts is recommended.

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Influence of Fiber Inserts, Type of Composite, and Gingival Margin Location on the Microleakage in Class II Resin Composite Restorations

Operative Dentistry ◽

10.2341/12-349-l ◽

2014 ◽

Vol 39 (1) ◽

pp. E9-E15 ◽

Cited By ~ 3

Author(s):

V Dhingra ◽

S Taneja ◽

M Kumar ◽

M Kumari

Keyword(s):

Resin Composite ◽

Class Ii ◽

Blue Dye ◽

Group Vi ◽

Group V ◽

Gingival Margin ◽

Composite Restorations ◽

Group I ◽

Distal Side ◽

Fiber Inserts

SUMMARY This study evaluated the influence of fiber inserts, type of composites, and location of the gingival seat on microleakage in Class II resin composite restorations. Fifty noncarious human third molars were selected for the study. Standardized Class II box type cavities were prepared on the mesial and distal side of 45 teeth. The gingival margin was placed above the cementoenamel junction (CEJ) on the mesial side and below the CEJ on the distal side. The remaining five teeth received no cavity preparations. The prepared samples were divided randomly on the basis of type of composite and presence or absence of fiber inserts, into four experimental groups of 10 teeth each and two control groups of five teeth each. The groups were defined as follows: group I (n=10) – Z350 XT; group II (n=10) – Z350 XT with fibers; group III (n=10) – P90; group IV (n=10) – P90 with fibers; and group V (n=5) – positive controls, cavities were not restored; group VI (n=5) – negative controls, no cavities were prepared. The samples were stored in distilled water in incubator at 37°C for 24 hours and then subjected to 500 cycles of thermocycling (5°C and 55°C) with a dwell time of 15 seconds. They were then placed in a 2% methylene blue dye solution for 24 hours at 37°C. Samples were sectioned longitudinally and evaluated for microleakage at the occlusal and gingival margin under a stereomicroscope at 20× magnification. Kruskal-Wallis and Mann-Whitney U-tests were used to compare the mean leakage scores. Restorations with gingival margins in enamel showed significantly less microleakage. Significant reduction in microleakage was observed in groups restored with P90 composite than those restored with Z350 XT. No improvement in microleakage was observed with the use of fiber inserts (p>0.05).

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Gingival Microleakage of Class II Resin Composite Restorations with Fiber Inserts

Operative Dentistry ◽

10.2341/06-86 ◽

2007 ◽

Vol 32 (3) ◽

pp. 298-305 ◽

Cited By ~ 15

Author(s):

O. El-Mowafy ◽

W. El-Badrawy ◽

A. Eltanty ◽

K. Abbasi ◽

N. Habib

Keyword(s):

Clinical Relevance ◽

Resin Composite ◽

Class Ii ◽

Composite Restorations ◽

Fiber Inserts

Clinical Relevance Fiber inserts incorporated at the gingival floor of Class II composite restorations resulted in a significant reduction of microleakage scores as compared to restorations made without inserts. This may lead to a reduced incidence of recurrent caries.

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Influence of enamel acid-etching on mechanical properties and nanoleakage of resin composite restorations after thermomechanical aging

10.47749/t/unicamp.2013.922048 ◽

2013 ◽

Author(s):

Erick Kamiya Coppini

Keyword(s):

Mechanical Properties ◽

Resin Composite ◽

Acid Etching ◽

Composite Restorations

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Marginal Integrity of Bulk Versus Incremental Fill Class II Composite Restorations

Operative Dentistry ◽

10.2341/14-306-l ◽

2016 ◽

Vol 41 (2) ◽

pp. 146-156 ◽

Cited By ~ 26

Author(s):

F Al-Harbi ◽

D Kaisarly ◽

D Bader ◽

M El Gezawi

Keyword(s):

Resin Composite ◽

Class Ii ◽

Chi Square ◽

Sandwich Technique ◽

Thermomechanical Cycling ◽

Composite Restorations ◽

Marginal Integrity ◽

Chi Square Test ◽

Maxillary Premolars ◽

Self Etch

SUMMARY Bulk-fill composites have been introduced to facilitate the placement of deep direct resin composite restorations. This study aimed at analyzing the cervical marginal integrity of bulk-fill vs incremental and open-sandwich class II resin composite restorations after thermomechanical cycling using replica scanning electron microscopy (SEM) and ranking according to the World Dental Federation (FDI) criteria. Box-only class II cavities were prepared in 91 maxillary premolars with the gingival margin placed 1 mm above and below the cemento-enamel junction. Eighty-four premolars were divided into self-etch and total-etch groups, then subdivided into six restorative subgroups (n=7): 1-Tetric Ceram HB (TC) was used incrementally and in the open-sandwich technique with 2-Tetric EvoFlow (EF) and 3-Smart Dentin Replacement (SD). Bulk-fill restoratives were 4-SonicFill (SF), 5-Tetric N-Ceram Bulk Fill (TN), and 6-Tetric EvoCeram Bulk Fill (TE). In subgroups 1-5, Tetric N-Bond self-etch and Tetric N-Bond total-etch adhesives were used, whereas in subgroup 6, AdheSE self-etch and ExciTE F total etch were used. One more group (n=7) was restored with Filtek P90 Low Shrink Posterior Restorative (P9) only in combination with its self-etch P90 System Adhesive. Materials were manipulated and light cured (20 seconds, 1600 mW/cm2), and restorations were artificially aged by thermo-occlusal load cycling. Polyvinyl-siloxane impressions were taken and poured with epoxy resin. Resin replicas were examined by SEM (200×) for marginal sealing, and percentages of perfect margins were analyzed. Moreover, samples were examined using loupes (3.5×) and explorers and categorized according to the FDI criteria. Results were statistically analyzed (SEM by Kruskal-Wallis test and FDI by chi-square test) without significant differences in either the replica SEM groups (p=0.848) or the FDI criteria groups (p>0.05). The best SEM results at the enamel margin were in TC+EF/total-etch and SF/total-etch and at the cementum margins were in SF/total-etch and TE/self-etch, while the worst were in TC/self-etch at both margins. According to FDI criteria, the best was TE/total-etch at the enamel margin, and the poorest was P9/self-etch at the cementum margin. Groups did not differ significantly, and there was a strong correlation in results between replica SEM and FDI ranking.

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