Cov yam ua rau cov pos hniav poob qis
Cov yam ua rau cov pos hniav poob qis. Cov pos hniav poob qis yog ib qho mob uas cov nqaij ntawm cov pos hniav (gingiva), uas yuav tsum tiv thaiv cov hauv paus hniav, poob qis lossis poob qis ntawm nws qhov chaw. Yog li ntawd, cov hauv paus hniav uas ib txwm npog yuav raug nthuav tawm. Ntau tus neeg xav tias cov pos hniav poob qis tsuas yog teeb meem zoo nkauj xwb, vim tias cov hniav zoo li ntev dua, tab sis qhov cuam tshuam tuaj yeem dav dua: cov hniav rhiab, ntau dua... nyeem ntxiv