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Microleakage of Posterior Composite Restorations with Fiber Inserts Using two Adhesives after ging.

Sharafeddin F, Yousefi H, Modiri Sh, Tondari A, Safaee Jahromi S - J Dent (Shiraz) (2013)

Bottom Line: Insertion of fibers in composite restorations can reduce the total amount of composite and help to decrease the shrinkage.The Kruskal-Wallis test revealed no significant differences in mean microleakage scores among all groups (p= 0.281).Use of polyethylene fiber inserts and etch-and-rinse and self-etch adhesives had no effect on microleakage in class II resin composite restorations with gingival margins below the CEJ after 6- month water storage.

View Article: PubMed Central - PubMed

Affiliation: Dept. of Operative Dentistry, Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran.

ABSTRACT

Statement of problem: Microleakage is one of the most frequent problems associated with resin composites, especially at the gingival margin of posterior restorations. Insertion of fibers in composite restorations can reduce the total amount of composite and help to decrease the shrinkage.

Purpose: The aim of this study was to evaluate the effect of polyethylene fiber inserts on gingival microleakage of class II composite restorations using two different adhesive systems.

Materials and method: In this experimental study, class II cavities were prepared on 60 premolars. The gingival floor was located 1.0 mm below the CEJ. Dimension of each cavity were 3 mm buccolingually and 1.5 mm in axial depth. The specimens were divided into 4 groups according to the adhesive type and fiber insert (n=4). Single bond and Clearfill SE bond and Filtek p60 were used to restore the cavities. In groups without fiber inserts composite was adapted onto cavities using layering technique. For cavities with fiber inserts, 3 mm piece of fiber insert was placed onto the composite increment and cured. The specimens were stored in distilled water at 37(o)C for 6 months. All specimens were subjected to 3000 thermo-cycling. The tooth surfaces except for 1 mm around the restoration margins covered with two layers of nail varnish .The teeth were immersed in 2% Basic Fuchsin for 24 hours, then rinsed and sectioned mesiodistally. The microleakage was determined under a stereomicroscope (40X). Data were statistically analyzed by Kruskal-wallis and Mann-Whitney U tests (p< 0.05).

Results: The Kruskal-Wallis test revealed no significant differences in mean microleakage scores among all groups (p= 0.281).

Conclusion: Use of polyethylene fiber inserts and etch-and-rinse and self-etch adhesives had no effect on microleakage in class II resin composite restorations with gingival margins below the CEJ after 6- month water storage.

No MeSH data available.


Related in: MedlinePlus

Premolars with completed slot preparation
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Figure 1: Premolars with completed slot preparation

Mentions: Then class II slot cavities were prepared on both proximal sides of each premolars using a 245 tungsten carbide bur (SS White; Great White Series, LAKEOOD, NJ, USA) in a water-cooled high-speed air turbine handpiece .All line angles were rounded. The gingival floor of the slot cavities was located at least 1.0 mm below the CEJ on the root surface. Each slot was 3 mm buccolingually wide and 1.5 mm in axial depth (Figure 1). The dimension of the cavities were verified with a periodontal probe. The teeth were randomly divided into 4 groups (n=4).


Microleakage of Posterior Composite Restorations with Fiber Inserts Using two Adhesives after ging.

Sharafeddin F, Yousefi H, Modiri Sh, Tondari A, Safaee Jahromi S - J Dent (Shiraz) (2013)

Premolars with completed slot preparation
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3927678&req=5

Figure 1: Premolars with completed slot preparation
Mentions: Then class II slot cavities were prepared on both proximal sides of each premolars using a 245 tungsten carbide bur (SS White; Great White Series, LAKEOOD, NJ, USA) in a water-cooled high-speed air turbine handpiece .All line angles were rounded. The gingival floor of the slot cavities was located at least 1.0 mm below the CEJ on the root surface. Each slot was 3 mm buccolingually wide and 1.5 mm in axial depth (Figure 1). The dimension of the cavities were verified with a periodontal probe. The teeth were randomly divided into 4 groups (n=4).

Bottom Line: Insertion of fibers in composite restorations can reduce the total amount of composite and help to decrease the shrinkage.The Kruskal-Wallis test revealed no significant differences in mean microleakage scores among all groups (p= 0.281).Use of polyethylene fiber inserts and etch-and-rinse and self-etch adhesives had no effect on microleakage in class II resin composite restorations with gingival margins below the CEJ after 6- month water storage.

View Article: PubMed Central - PubMed

Affiliation: Dept. of Operative Dentistry, Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran.

ABSTRACT

Statement of problem: Microleakage is one of the most frequent problems associated with resin composites, especially at the gingival margin of posterior restorations. Insertion of fibers in composite restorations can reduce the total amount of composite and help to decrease the shrinkage.

Purpose: The aim of this study was to evaluate the effect of polyethylene fiber inserts on gingival microleakage of class II composite restorations using two different adhesive systems.

Materials and method: In this experimental study, class II cavities were prepared on 60 premolars. The gingival floor was located 1.0 mm below the CEJ. Dimension of each cavity were 3 mm buccolingually and 1.5 mm in axial depth. The specimens were divided into 4 groups according to the adhesive type and fiber insert (n=4). Single bond and Clearfill SE bond and Filtek p60 were used to restore the cavities. In groups without fiber inserts composite was adapted onto cavities using layering technique. For cavities with fiber inserts, 3 mm piece of fiber insert was placed onto the composite increment and cured. The specimens were stored in distilled water at 37(o)C for 6 months. All specimens were subjected to 3000 thermo-cycling. The tooth surfaces except for 1 mm around the restoration margins covered with two layers of nail varnish .The teeth were immersed in 2% Basic Fuchsin for 24 hours, then rinsed and sectioned mesiodistally. The microleakage was determined under a stereomicroscope (40X). Data were statistically analyzed by Kruskal-wallis and Mann-Whitney U tests (p< 0.05).

Results: The Kruskal-Wallis test revealed no significant differences in mean microleakage scores among all groups (p= 0.281).

Conclusion: Use of polyethylene fiber inserts and etch-and-rinse and self-etch adhesives had no effect on microleakage in class II resin composite restorations with gingival margins below the CEJ after 6- month water storage.

No MeSH data available.


Related in: MedlinePlus