Effect of Cavosurface Margin Configuration of Class V Cavity Preparations on Microleakage of Composite Resin Restorations
Marjaneh Ghavamnasiri, Mahshid Bagheri
Citation Information :
Ghavamnasiri M, Bagheri M. Effect of Cavosurface Margin Configuration of Class V Cavity Preparations on Microleakage of Composite Resin Restorations. J Contemp Dent Pract 2008; 9 (2):122-129.
The aim of this study was to compare the marginal leakage of hybrid and microfilled composite resin in Class V restorations with and without an enamel bevel.
Methods and Materials
Fifty-six cavities were prepared on the buccal and lingual surfaces of 28 extracted human molars using a round bur with the dimensions of 3×2×1.5 mm. The specimens were divided into two groups of 28 based on the cavosurface margin configuration (beveled and non- beveled). Each group was then divided into two subgroups (n=14) based on the type of composite resin (microfilled and hybrid) used for restoration. After completing restorative procedure, specimens were thermocycled and immersed in 0.5% basic fuchsine. Samples were embedded in polyester and then sectioned both mesiodistally and buccolingually. Dye penetration was observed with a stereomicroscope at 25x magnification. Statistical nonparametric analysis Kruskal-Wallis and Mann-Whitney tests were performed to compare the data (a=0.05).
Results
There was no statistically significant difference between the two types of composites and two types of enamel margins with respect to microleakage (P>5%). The degree of microleakage at the gingival margin located in dentin of each group was more than that of the enamel margin (P<5%).
Conclusion
An enamel bevel in a Class V cavity preparation had no effect on the reduction of marginal leakage using either hybrid or microfilled composite resin.
Citation
Bagheri M, Ghavamnasiri M. Effect of Cavosurface Margin Configuration of Class V Cavity Preparations on Microleakage of Composite Resin Restorations. J Contemp Dent Pract 2008 February; (9)2:122-129.
Flowable composites as “Filled Adhesives”: a microleakage study. J Contemp Dent Pract 2004;532-41.
The effect of flowable resin composite on microleakage in Class V cavities. Oper Dent 2003; 28:42-6.
In vitro evaluation of microleakage of flowable composite in Class V restorations. Braz Dent J 2002; 13:184-7.
Evaluation of microleakage at the CEJ of Class V cavities restored with four different adhesive systems. European Cells and Materials 2005;9 suppl.1:58-9.
Sturdevant's art and science of operative dentistry. Fifth ed, Mosby, 2006, Chapter 12, page 529-64.
The effect of dentin bonding agents as marginal leakage of composite restorations. J Oral Rehabil 1990,17:519-27.
Microleakage of tooth colored restorations with a beveled gingival margin. Quintessence Int 1998 Jun; 29(6):356-61.
Effect of resin viscosity and enamel beveling on the clinical performance of Class V composite restorations: Three year result. Oper Dent 2003 Sep-Oct; 28:482-7.
Influance of marginal bevels on micro leakage around class V cavities bonded with seven self-etching agents. Am J Dent 2004; 17:257-61.
The effect of flowable resin composite on microleakage in Class V cavities. Oper Dent 2003; 28:42-6.
Microleakage of composite restorations after acid or Er-YAG laser cavity treatments. Dental Material 2001; 17:340-6.
Variability in microleakge observed in a total-etch wet bonding technique under different handling conditions. J Dent Res 1995; 74(5):1168-78.
Microleakge of a packable composite associated with different materials. J Clin Dent 2002; 13:111-15.
Microleakage of Class V pakable resin composites lined with flowables: an in vitro study .Oper Dent 2002; 27:600-5.
Oper Dent 2002; 27:569-75.
Quantitative evaluation of marginal leakage of two resin composite restorations using two filling techniques. Oper Dent 2002; 27:510-15.
The preparation of enamel margin beveling in proximal cavities. Schweiz Montsschr Zahnmed. 1992;102:1181-8.
