Effects of high-energy ball-milling on injectability and strength of β-tricalcium-phosphate cement

Jiyoung Bae; Yumika Ida; Kazumitsu Sekine; Fumiaki Kawano; Kenichi Hamada

doi:10.1016/j.jmbbm.2015.03.005

Effects of high-energy ball-milling on injectability and strength of β-tricalcium-phosphate cement

J Mech Behav Biomed Mater. 2015 Jul:47:77-86. doi: 10.1016/j.jmbbm.2015.03.005. Epub 2015 Mar 18.

Authors

Jiyoung Bae¹, Yumika Ida², Kazumitsu Sekine³, Fumiaki Kawano⁴, Kenichi Hamada⁵

Affiliations

¹ Department of Biomaterials and Bioengineering, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. Electronic address: enchantee23@naver.com.
² Department of Biomaterials and Bioengineering, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. Electronic address: c301251008@tokushima-u.ac.jp.
³ Department of Biomaterials and Bioengineering, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. Electronic address: ksekine@tokushima-u.ac.jp.
⁴ Department of Comprehensive Dentistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. Electronic address: fumiaki@tokushima-u.ac.jp.
⁵ Department of Biomaterials and Bioengineering, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. Electronic address: hamada.dent@tokushima-u.ac.jp.

PMID: 25855467
DOI: 10.1016/j.jmbbm.2015.03.005

Abstract

Calcium phosphate cement (CPC) offers many advantages as a bone-substitution material. The objective of this study is to develop a new CPC that simultaneously exhibits fine injectability, a short setting time, and high strength. β-tricalcium phosphate (β-TCP, control) powder was ball-milled for 24h to produce a new cement powder. The modified β-TCP after 24h milling (mβ-TCP-24h) exhibited excellent injectability even 1h after mixing. The mechanical properties of the set cement (compact) were evaluated using compressive strength (CS) and diametral tensile strength (DTS) testing. The CS and DTS values of the mβ-TCP-24h compacts were 8.02MPa and 2.62MPa, respectively, at 5h after mixing, and were 49.6MPa and 7.9MPa, respectively, at 2 weeks after mixing. All the CS and DTS values of the mβ-TCP-24h compacts were significantly higher than those of the control for the same duration after mixing. These results suggest that the mechano-chemically modified β-TCP powder dissolves rapidly and accelerates hydroxyapatite precipitation, which successfully shortens the cement setting time and enhances the strength. This study supports that mβ-TCP-24h is a promising candidate for use in injectable CPCs with improved strength.

Keywords: Compressive strength; Diametral tensile strength; Hydroxyapatite; Injectability; Planetary ball-milling; Self-setting; β-TCP.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bone Cements*
Calcium Phosphates*
Compressive Strength
Injections
Mechanical Phenomena*
Tensile Strength
Time Factors

Substances

Bone Cements
Calcium Phosphates
beta-tricalcium phosphate