Nws yog ib qho kev kho dua tshiab uas ua los ntawm cov plooj (porcelain) uas tsis tshua yaj thiab cov khoom siv hlau hauv qab, uas muaj ob qho tib si lub zog ntawm cov hlau thiab kev zoo nkauj ntawm cov plooj (porcelain), thiab tuaj yeem kho cov duab zoo thiab kev ua haujlwm ntawm cov hniav, thiab yog ib qho kev kho kom ruaj khov nrog lub zog siab, muaj tseeb. tsos, xim ruaj khov, du nto, tsis yooj yim rau hnav, acid thiab alkali tsis kam, thiab zoo biocompatibility.