Resumen
This study aimed to investigate the free calcium released from different brands of toothpaste after incorporation with a beta-tricalcium phosphate (ß-TCP)/amorphous calcium phosphate (ACP) mixed powder and with ß-TCP powder alone. Four brands of toothpaste were used for the experiment: Nano-Bio Activation Toothpaste, Colgate Total Advanced Whitening Toothpaste, BORONIA Herbal Whitening, and BioMin F. The investigated ß-TCP and ACP powders were prepared by a two-step sintering method using raw coral material. Analytical results found that the mean calcium concentration of the ß-TCP/ACP (2:1) powder in deionized water was 3.4% when the pH was between 5 and 9. Moreover, statistical results revealed that the toothpaste containing ß-TCP powder had significantly higher calcium concentrations than the normal toothpaste. The toothpaste containing mixed ß-TCP/ACP powder had a higher calcium concentration than the toothpaste containing only ß-TCP powder. Twice as much free calcium could be released from ß-TCP/ACP toothpaste than from ß-TCP-only toothpaste. Thus, toothpaste containing ß-TCP/ACP mixed powder offers greater benefits to facilitate the remineralization of enamel than toothpaste containing only ß-TCP.