Assertion: dental crown | /r/MadeOf | high-grade porcelain
Facets:
Source sentences:
text: Avoid dark-coloured foods and drinks: most dental crowns are made from high-grade porcelain that is resistant to discolouration and staining.
text: Avoid dark-coloured foods and drinks: most dental crowns are made from high-grade porcelain that is resistant to discolouration and staining.