J Korean Acad Pediatr Dent.  2021 May;48(2):168-175. 10.5933/JKAPD.2021.48.2.168.

Comparison of Microleakage and Compressive Strength of Different Base Materials

• Jang E
• Lee J
• Nam S
• Kwon T
• Kim H

• KMID: 2516426
• DOI: http://doi.org/10.5933/JKAPD.2021.48.2.168

Abstract

This study compared the microleakages and compressive strengths of various base materials.
To evaluate microleakages, 50 extracted permanent premolars were prepared. The teeth divided into 5 groups of 10 each according to the base materials. Cavities with a 5.0 mm width, 3.0 mm length, and 3.0 mm depth were formed on the buccal surfaces of the teeth. After filling the cavities with different base materials, a composite resin was used for final restoration. Each specimen was immersed in 2% methylene blue solution and then observed under a stereoscopic microscope (× 30). To evaluate the compressive strength, 5 cylindrical specimens were prepared for each base material. A universal testing machine was used to measure the compressive strength.
The microleakage was highest in the Riva light cure^TM group and lowest in the Biodentine^TM and Well-Root^TM PT groups. For the compressive strengths, in all groups, acceptable strength values for base materials were found. The highest compressive strength was observed in the Fuji II LC^TM group and the lowest strength in the Well-Root^TM PT group.