Assertion: cavity | /r/HasProperty | difficult
Facets:
value: very
type: DEGREE
Source sentences:
text: When the tooth decay is developing at an unusually quiet stage and does not show any obvious symptoms, it is very difficult for the patient to recognize the damage to the teeth.
text: Cavities that are in between teeth or on the back surfaces can be difficult to see at home, but are easily seen with the right dental equipment and x-rays.