zinc. Txawm tias ob peb txoj kev tshawb fawb⁴ tau pom tias zinc, nyob rau hauv daim ntawv ntawm cov tshuaj ntxuav qhov ncauj los yog tshuaj txhuam hniav, tuaj yeem txo cov plaque build-up thiab tartar tsim, ntau, ntau cov qauv kev tshawb fawb yog xav tau kom paub meej tias nws muaj peev xwm ua tau zoo ntawm cov hniav noj qab haus huv.