Korean J Dent Mater.  2023 Dec;50(4):281-292. 10.14815/kjdm.2023.50.4.281.

Changes in adhesive strength and pH of dental universal adhesive in accordance with varying proportions of 10-MDP

• Suh WK
• Kim KM
• Kwon JS

• KMID: 2550713
• DOI: http://doi.org/10.14815/kjdm.2023.50.4.281

Abstract

This study investigated the physical properties of dental universal adhesive according to the varying proportions of 10-MDP, a functional monomer that is a representative component of universal adhesives. Experimental dental universal adhesives were made with 5 different proportions of 10-MDP (from 8.906 wt% to 10.500 wt%). Shear bond strength between bovine teeth and composite resin blocks were measured by applying each experimental adhesive between them. Following the shear bond strength test, fractured surfaces were observed for measurement of the fracture modes. Finally, the pH of the liquid experimental adhesives were measured, to understand results from shear bond strength. As the results, bonding strength of the experimental dental universal adhesive increased gradually with increasing amounts of 10-MDP, but showed a tendency to decrease gradually after a certain amount was exceeded. The highest adhesive strength was observed when 9.710 wt% of 10-MDP was added. In terms of pH, results showed that as the amount of 10-MDP in the experimental dental universal adhesive increased, the pH decreased from pH 2.9 to pH 2.76. Based on the results of this study, it was evident that the proportions of 10-MDP resulted in changes in adhesive strength and pH, though the optimal amount of 10-MDP would need a further investigations in the future.

Keyword

10-MDP; Universal adhesive; Shear bond strength; pH; Dentin adhesive