engleski

The influence of fillers on certain chemical and mechanical properties of experimental composite resin materials based on amorphous calcium phosphate

State-of-the-art bioactive materials containing amorphous calcium phosphate are able to regenerate impaired dental tissue and thus belong to the rapidly expanding area of biomedical research. However, the active components of these materials pose limitations in their clinical implementation when durability or resistance to crack and deformation upon load are required. Poor mechanical properties and high polymerization contraction are identified as the main obstacles. The aim of this dissertation was to examine the influence of the addition of inert fillers on strength, hardness, polymerization shrinkage, degree of conversion and ion release of ACP based composite materials. Based on the results of the performed tests, it was concluded that the glass microfiller with high silanization percentage has succeeded in improving the strength and reducing the polymerization shrinkage of these materials without impeding their remineralization potential and maintaining satisfactory degree of conversion. In the presence of silica nanofiller, the ion release showed interesting kinetic profile with significantly increased calcium and phosphate release. Additionally, the material’s hardness has improved by the addition of 10% of silica fillers. The principle of adding inert, reinforcing fillers to the biomimetic, amorphous calcium phosphate based material, has proven beneficial effects on its mechanical properties and the reduction of polymerization shrinkage.

amorphous calcium phosphate ; composite resins ; remineralization ; caries ; fillers

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