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The Effect of Carbonated, Isotonic, and Yoghurt Drinks to the Hardness of Bulk Fill Composite Resin

*Tyagita Haning Ratnasari  -  Department of Dentistry, Faculty of Medicine , Diponegoro Unirversity, Semarang, Indonesia
Nadia Hardini  -  Department of Dentistry, Faculty of Medicine , Diponegoro Unirversity, Semarang, Indonesia
Yoghi Bagus Prabowo  -  Department of Dentistry, Faculty of Medicine , Diponegoro Unirversity, Semarang, Indonesia
Faizah Fulyani  -  Department of Medical Science, Division of Medical and Biochemical Biology, Faculty of Medical Science, Diponegoro University, Semarang,, Indonesia

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Abstract

Background: Composite resin often used as a restoration material due to its advantages in the aesthetic field. The bulk-fill type is one of the composite resin that can be applied directly into cavities as deep as 4 mm, so that restoration procedure becomes easy and effective. Hence, exposure to various acidic drinks can reduce the hardness of composite resins and eventually lead to failure of the tooth restoration process.

Objective: This research aimed to evaluate the effects of several commercial acidic drinks, (carbonated, isotonic, and yogurt) on the hardness of bulk-fill composite resins.

Method: This research was an experimental study with a post-test control group design. Twenty-four specimens were made with the size 10 x 4 mm using the metal mold rings. Specimens were divided into 4 groups for artificial saliva (served as a control), carbonated, isotonic, and yogurt. Specimens were immersed in storage agents for 5 seconds followed by artificial saliva for 5 seconds. This cycle was repeated 20 times for 14 days. The bulk-fill composite resin hardness was measured using a Micro Vickers Hardness Tester with a load of 100 grams for 10 seconds. Statistical analysis was performed using One Way ANOVA and Post Hoc LSD

Results: Data were normally distributed and homogeneous with p > 0.05. The One Way ANOVA test showed the biggest difference in bulk fill composite resin between 4 groups (p < 0.001). The Post Hoc LSD test showed significant differences between all groups (p < 0.001)

Conclusion: Carbonated, isotonic, and yogurt drink significantly decreased surface microhardness of bulk-fill composites resin but the carbonated drinks greatly reduce the hardness value since it has the lowest pH of 2.3.

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Keywords: Carbonated beverage, Isotonic, Yogurt, Hardness

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