The demineralization of cementum and dentin can occur in a pH range of 6.2-6.8.

骨质质脱矿可以在pH6.2到6。8的范围内发生。

If the gingiva recedes or plaque forms between the gingiva and the root, bacteria and acids have direct access to the cementum, which is much softer than enamel and dissolves more quickly.

如果龈退缩或龈根间形成，细菌酸就可以直接侵犯骨质，与釉质相比骨质更软，溶解更快。

Dental caries lesions typically form in an environment where there are lots of sugars in the mouth and a pH below 5.5 for enamel and below 6.2 to 6.8 for cementum and dentin.

般发生在口腔中多糖、釉质pH低于5.5、骨质质pH处于6.2到6。8的情况下。

The root is covered by cementum, which is a bonelike substance that the periodontal ligament's fibers attach to.

包裹着根的是骨质，是种骨样物质，也是周韧带纤维连接的部分。