Preparation and evaluation of the physical and mechanical properties of new root repair material containing hydroxyapatite nanoparticles
چکیده
Background and goal:
An ideal material for filling the dental root should be biocompatible, non-toxic, antimicrobial and radiopaque, and it should not be absorbed or dissolved in the oral environment. The aim of this study was to prepare and evaluate the physical and mechanical properties of a new root restoration material containing hydroxyapatite nanoparticles.
Materials and methods: In this study, bismuth oxide and nano hydroxyapatite particles were mixed with white Portland cement (Tehran Cement Factory) at a weight ratio of 20 and 5%, respectively. Before mixing, the materials, mixing pad, spatulas and glass slabs used were placed at a temperature of 23 ± 1 °C for one hour. Then both materials were mixed. Then the physical properties including flow rate, handling, degree of solubility and dimensional changes were evaluated and investigated according to the ISO 6876:2012 protocol in the new root restoration material and MTA. The mechanical properties of this material were also checked by compressive strength test and compared with MTA.
Results: The formation of hydroxyapatite layer was observed in the new restorative material. The new root restorative material had lower compressive strength than MTA. But, its solubility and dimensional changes were more than MTA. Its flow rate is similar to MTA, and its handling is lower than MTA and is moderate and weak.
Conclusion: The new restorative material and mechanical had suitable physical properties and was bioactive. Therefore, it can be used for root restoration in the future.