Txhuam Cov Lus Qhia
Thaum txhuam hniav, tsis txhob ntxuav cov hniav xwb - tsom rau ntawm cov pos hniav. Lub gingival sulcus ntawm cov hniav thiab cov pos hniav yog qhov chaw cov quav hniav yooj yim tshaj plaws, uas yog qhov pib ntawm periodontitis. Maj mam nias cov txhuam hniav tawm tsam cov pos hniav thiab vibrate me ntsis rau kev tiv thaiv cov hniav lwj thiab periodontitis.