Assertion: enamel | /r/HasProperty | damaged
Facets:
Source sentences:
text: There are two different ways your enamel can be damaged: Abrasion and Erosion.
text: Interestingly, tooth enamel is one of the only body tissues that doesn't regenerate itself when it is damaged, which could indicate that it is supposed to last a lifetime---which means that there is no such thing as "normal" tooth wear.
text: Tooth enamel protects your teeth from damage by external factors but once enamel is damaged, it can’t repair itself.
text: Since it doesn’t contain living cells, it cannot regrow or repair itself if it is damaged.