Microleakage Evaluation in Class II Restorations when using a Resin Based Composite as a Restorative Material in many Application Techniques (An in-vitro Study)

Abstract

Aim of Study: To Evaluate the microleakage on gingival wall of Class II preparation when using five different techniques of the resin based composite restorations.

Methods and Materials: 50 extracted human premolars were used for this study. Box-only preparations were prepared on Mesial and distal of each tooth. Teeth were divided randomly into five equal groups (n=20), Group 1: Bulk-fill Composite, Group 2: Preheated Bulk-fill Composite, Group 3: Bulk-fill Flow, Group 4: Preheated Conventional Composite, and Group 5: Conventional Composite. After the restoration procedures all samples restored in 37° sterilized water for 24 hours, and then samples where placed in methylene-blue dye for 24 hours. Teeth were sectioned for microscopic examination for microleakage. Mann-whitney U and Kruskal-Wallis tests were applied with SPSS 25. P-value of less than 0.05 was considered significant.

Results: There is no significant difference among the first four group, whereas, each group 5 has significant difference with each previous group.  (P<0.05).

Conclusion: With in the limitations of this study it can be concluded that preheated composite has less microleakage when compared with same type of composite without pre-heat, on the other hand, all types of bulk-fill composite has less microleakage when compared with conventional composite.

Keywords: Bulk-fill Composite- Bulk-fill Flow Composite - Preheated Composite- Microleakage – Dye-penetration test.