Nyob rau hauv lub teeb ntawm qhuav, ntub cov kab ntau lawm ntawm cov hluavtaws tawv cov lag luam tawm DMF tso pa roj, cov khoom siv rov ua dua tuaj yeem ua kom cov pa tawm mus txog qhov yuav tsum tau muaj kev tiv thaiv ib puag ncig, thiab rov ua dua cov khoom siv DMF, siv cov khoom ua haujlwm siab ua kom DMF rov ua haujlwm tau zoo dua.Qhov kev rov qab los ntawm DMF tuaj yeem ncav cuag 90%.