Comparison of the effects of added alpha- and beta- tricalcium phosphate on the basic properties of apatite cement.
Effects of added alpha-tricalcium phosphate (alpha-TCP) and beta-TCP were investigated to shed light on the setting reaction of apatite cement (AC) consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous8 (DCPA). Added beta-TCP showed no reactivity, and thus resulted in extended setting time and decreased mechanical strength. In contrast, alpha-TCP dissolved to supply calcium and phosphate ions after initial apatite crystal formation by the reaction of TTCP and DCPA. Although setting time was delayed because alpha-TCP was involved only in the latter reaction of apatite cement, larger apatite crystals were formed due to its addition. As a result of larger apatite crystal formation, the mechanical strength of alpha-TCP-added apatite cement increased by approximately 30%, as compared to alpha-TCP-free apatite cement.
Nakagawa
Akinari
A
Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
Matsuya
Shigeki
S
Takeuchi
Akari
A
Ishikawa
Kunio
K
D001672:Biocompatible Materials / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D013997:Time Factors
D001672:Biocompatible Materials; D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C485817:beta-tricalcium phosphate; C485830:tetracalcium phosphate; C485829:calcium phosphate, dibasic, anhydrous