Assertion: whitening's teeth | /r/CapableOf | document concave cavities
Facets:
value: following use.27
type: TEMPORAL
Source sentences:
text: , reported that a mixture of charcoal and table salt was not only ineffective (the teeth had a yellow cast, which the authors attributed to removal of the enamel during the brushing, revealing the dentin underneath), and also documented concave cavities on the labial surfaces of the anterior teeth following use.27