1824年皮博迪医生首次在牙粉中添加皂粉；19世纪50年代约翰·哈里斯在牙粉中添加了白垩。
A dentist called Peabody became the first person to add soap to toothpowder in 1824 and chalk was added in the 1850s by John Harris.
1824年皮博迪医生首次在牙粉中添加皂粉；19世纪50年代约翰·哈里斯在牙粉中添加了白垩。
A dentist called Peabody became the first person to add soap to toothpowder in 1824 and chalk was added in the 1850s by John Harris.
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