Citation Information :
Bhanwal U, Jagdish K, Pai V, Y. Effect of Different Base Materials and Techniques on Microleakage in Class II Composite Open Sandwich Restorations: An in vitro Study. World J Dent 2014; 5 (2):87-91.
This study was performed to compare microleakage in class II composite restorations with flowable composites and dual cure composite resin as intermediate material and also to evaluate the effect of delayed light polymerization of dual cure composite base on microleakage.
Materials and methods
Class II box cavities were made with air water spray and divided into four groups. Group 1 was restored without base, group II with flowable composite base, group III with a dual cure composite base which was immediately cured and group IV with 60 seconds delayed cure, dual cure composite base. Remaining cavity was restored with composite resin Specimens were immersed in methylene blue dye after thermocycling and sectioned through mesiodistal center of tooth and observed for leakage pattern. Microleakage was evaluated using dye penetration with methylene blue. Microleakage pattern was observed under a stereomicroscope.
Kruskal-Wallis test and Mann-Whitney test were used for statistical analysis.
Results
Results of the study showed that application of a composite resin base below a class II composite restoration significantly decreased microleakage as compared to restorations without a base. The least and comparable microleakage scores were seen in groups with flowable composite and dual cure composite (delayed cure) as a base, followed by dual cure composite which was immediately cured.
How to cite this article
Bhanwal U, Nadig RR, Jagdish K, Pai V, Yashwanth. Effect of Different Base Materials and Techniques on Microleakage in Class II Composite Open Sandwich Restorations: An in vitro Study. World J Dent 2014;5(2):87-91.
Factors involved in the development of polymerization shrinkage stress in resincomposites: a systematic review. Dental Material 2005;21: 962-970.
Flowability of composites is no guarantee for contraction stress reduction. Dental Materials 2009; 25:649-654.
Effect of dual cure composite as dentin substitute on marginal integrity of class II open sandwich restorations. Operative Dentistry 2009;34-2:150-156.
Microleakage at the cervical margin of composite class II cavities with different restorative techniques. Operative Dentistry 2001;26:60-69.
Modified class II open sandwich restoratins. Evaluation of interfacial adaptation and influence of different restorative techniques. European J Oral Sciences 2002;110: 270-275.
Effect of fibre nets, application techniques and flowable composites on microleakage and the effect of fibre nets on polymerization shrinkage in class II MOD cavities. Operative Dentistry 2009;34-2174-2180.
Effect of delayed light polymerization of a dual cured composite on microleakage of class II posterior composite open sandwich restorations. Quintesence International 2009:471-476.
Microleakage of class II posterior composite restorations with gingival margins placed entirely within dentin. JCDA 2007;73(3):255-258.
The effect of flowable resin composites as gingival increments on the microleakage of posterior resin composites. Operative Dentistry 2004;29(2): 162-167.
Effects of flowable composite lining and operator experience on microleakage and internal voids in class II composite restorations. J Prosthet Dentist 2001;85:177-183.
Influence of flowable and self curing linings on microleakage in vitro. Operative Dentistry 2002;27: 569-575.
Evaluation of marginal microleakage in class II cavities effect of microhybrid, flowable and compactable resins. Restorative Dentistry 2003;34(2):93-98.
The effect of flowable materials on the microleakage of composite cavities that extend apical to the CEJ. Operative Dentistry 2009;34(2):174-180.
Influence of flowable liner and margin location on microleakage of conventional and packable class II resin composites. Operative Dentistry 2005;31(1):32-48.
The effect of an intermediate layer of flowable composite resin on microleakage in packable composite restorations. Int J Paediatr Dent 2005;15: 349-354.
Effect of thickness of flowable resins on marginal leakage in class II composite restorations. Operative Dentistry 2002;27:373-380.
The effect of flowable and dual-cure resin composite liners on gingival microleakage of posterior resin composite. J Dent Med 2008;21(2):116-123.
The influence of light exposure on polymerization of dual cure resin cements. Operative Dentistry 1993;18:48-55.
