So typically, dental plaque can form on the surface of teeth, b ut if the pH of the local environment around the tooth surface remains above about 5.5, enamel will not demineralize.

一般情况下，牙菌斑形成于牙齿表面，但当牙表面局部环境的pH值持续高于5.5时，牙釉质将不能脱矿化。