ABSTRACT
AIM: The study was conducted to evaluate and compare the effect of various placement techniques of composite restoration on microleakage. MATERIALS AND METHODS: Forty extracted premolars were selected and a rectangular-shaped cavity was prepared on the buccal surface of cervical third of each tooth. Thereafter, teeth were randomly divided into four groups equally and were restored with the composite restorative material with different placement techniques, i.e., bulk placement technique, horizontal incremental technique, split incremental technique, and newly introduced Mat incremental technique. Samples were thermocycled and immersed in methylene blue dye for 24 hours. The samples were then sectioned and evaluated under a stereomicroscope for microleakage. RESULTS: Microleakage was present least in the Mat incremental group and maximum in the bulk placement group while intercomparison revealed statistically significant difference between all the groups except for split incremental and Mat incremental groups. CONCLUSION: The recently introduced Mat incremental placement technique showed least microleakage when compared to conventional techniques. HOW TO CITE THIS ARTICLE: Somani R, Som NK, Jaidka S, et al. Comparative Evaluation of Microleakage in Various Placement Techniques of Composite Restoration: An In Vitro Study. Int J Clin Pediatr Dent 2020;13(3):264-268.
ABSTRACT
PURPOSE: To evaluate and compare the compressive strength and antimicrobial efficacy of Amalgomer CR and Fuji IX. METHOD: 40 restorative pellets were taken for evaluating compressive strength and 40 blood agar petridishes for antimicrobial efficacy. 40 restorative pellets were fabricated from the tested materials according to manufacturer intructions. Then the pellets were subjected to compressive strength testing using Instron Universal Testing machine. Antibacterial activity of Amalgomer CR and Fuji IX was assessed using the agar diffusion test. The powder and liquid of each test material was mixed and inserted in the punched wells (6 mm × 2 mm) in agar petridishes. An empty well was taken as control to authenticate the results. The agar plates were incubated at 37 °C for 24 h for Streptococcus mutans growth and then size of the inhibition zones was measured using vernier caliper. RESULTS: Amalgomer CR had shown significantly higher Compressive Strength but comparable antimicrobial efficay to GIC Fuji IX. CONCLUSION: Amalgomer CR can be recommended as a permanent restorative material based on its better compressive strength and comparable antimicrobial efficacy to GIC Fuji IX.
