Possibility of increase of dental calculus formation by daily meals and food ingredients

采用pH下降法研究了4种膳食对体外钙化的影响。米饭增加了钙化，而烤面包减少了钙化。膳食1-3（如土豆）和西式膳食4（如黄油）中的一些菜肴和食物成分增加了钙化。然而，由于口腔中的唾液抑制了它们的促进作用，因此我们的日常饮食可能会抑制牙结石的形成。

The effects of four kinds of daily meals on the in vitro calcification were studied using the pH drop method. Boiled rice increased the calcification, while toasted bread decreased it. A few dishes and food ingredients from meal 1-3 (e.g.potato) and Western-type meal 4 (e.g.butter) increased the calcification. However, since saliva in oral cavity inhibits their promoting effect, it is suggested that our daily meals may be inhibitory on the dental calculus formation.