Assertion: khat | /r/HasAspect | discoloration
Facets:
value: on dental and oral tissues
type: LOCATION
Source sentences:
text: Khat has been reported to have detrimental effects on dental and oral tissues, including keratotic white lesions, mucosal pigmentations, plasma cell stomatitis, teeth attrition and discoloration, gingival recession, and xerostomia.