Novel incorporation of charged hydroxyapatite nanoparticles into resin adhesive

H. Agha, Bahra and Hamaghareeb Hamasaeed, Niaz and H.S. Hussain, Faiq (2023) Novel incorporation of charged hydroxyapatite nanoparticles into resin adhesive. https://cellmolbiol.org/index.php/CMB/article/view/5005, 69 (11). ISSN 0145-5680

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Abstract

The direct mixing of Nano-hydroxyapatite with Resin Adhesive often leads to weak molecular interactions, which can compromise the dispersion of Nano-hydroxyapatite within the resin adhesive and cause structural damage to the Nano-hydroxyapatite. Therefore, the present study aimed to identify an approach in which Nano-hydroxyapatite is charged or modified prior to its integration into resin adhesive. In this study, Nano-hydroxyapatite was modified using aminopropyltriethoxysilane (APTS), subsequently, the amine groups present on the surface of Nano-hydroxyapatite were additionally modified using succinic anhydride. This modification process resulted in the production of negatively charged Nano-hydroxyapatite - aminopropyltriethoxysilane (n-HA-APTS-SAH). The charged Nano-hydroxyapatite particles were characterized using FTIR and SEM. Subsequently, the charged Nano-hydroxyapatite particles were incorporated into resin dental adhesive. Comprehensive characterization of the composite material was carried out through SEM, FTIR, EDX mapping, and Micro-Raman Spectroscopy. The results revealed the presence of Nano-hydroxyapatite in the mixture and a homogeneous and well-dispersed state with no observable aggregation of Nano-hydroxyapatite particles within the adhesive. Furthermore, the particles still maintain a spherical shape with their sizes falling within the nanoscale range.

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