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Effects of Incorporating Nano-Sized Monocalcium Phosphate Monohydrate Fillers on Whisker-Reinforced Dental Composites

Published

Author(s)

Hockin D. Xu, Limin Sun, Michael Weir, Shozo Takagi, P P. Chow, B Hockey

Abstract

Clinical data indicate that secondary caries and restoration fracture are the most common problems facing dental resin composites. The ultimate goal is to impart caries inhibiting function to whisker-reinforced composites through the addition of nano particles of monocalcium phosphate monohydrate (MCPM), dicalcium phosphate anhydrous (DCPA), and tetracalcium phosphate (TTCP). The specific goal of this pilot study was to understanding the relationships between the ratio of one type of releasing filler (MCPM) and reinforcement filler (whiskers) and the composite properties. Nano silica-fused whiskers were mixed with nano MCPM at the following MCPM:whisker mass ratios: 1:0, 2:1, 1:1, 1:2, and 0:1. The composites were immersed for 1 d to 56 d to measure Ca and PO4 release. When the MCPM:whisker ratio was changed from 0:1 to 1:2 and to 1:0, the composite flexural strength (mean ? sd; n = 5) decreased from (174 ? 26) MPa to (138 ? 9) MPa and to (38 ? 11) MPa (p
Citation
Journal of Biomedical Materials Research Part B-Applied Biomaterials
Volume
81

Keywords

Ca and PO4 release, dental composite, elastic modulus, flexural strength, nanoparticles, tooth caries, whisker reinforcement

Citation

Xu, H. , Sun, L. , Weir, M. , Takagi, S. , Chow, P. and Hockey, B. (2006), Effects of Incorporating Nano-Sized Monocalcium Phosphate Monohydrate Fillers on Whisker-Reinforced Dental Composites, Journal of Biomedical Materials Research Part B-Applied Biomaterials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852607 (Accessed April 16, 2024)
Created August 21, 2006, Updated February 17, 2017