Qhov no nyob ntawm feem ntau ntawm kev saib xyuas ntawm lub qhov ncauj kab noj hniav, thiab peb tuaj yeem ncaj qha cuam tshuam qhov no. Qhov tseem ceeb tshaj plaws nyob rau hauv txoj kev lag luam no yog yuav ib qho txhuam hniav zoo, muab tshuaj txhuam thiab, yog tias ua tau, tshuaj tsuag lossis tshuaj yaug qhov ncauj.
Tam sim no, muaj ntau cov tshuaj txhuam hniav, muaj ntau yam teebmeem, nrog rau cov tshuaj txhuam hniav rau cov hniav ntxuav hniav dawb, cov tshuaj txhuam hniav nrog thiab tsis muaj cov tshuaj fluorine, tshuaj txhuam hniav rau menyuam yaus thiab lwm tus.
Tiam sis hauv tsab xov xwm no kuv xav nrog tham txog cov tshuaj txhuam hniav rau me nyuam yaus. Vim cov me nyuam me tsis tuaj yeem txiav txim siab seb cov khoom noj zoo li cas thiab qhov twg tuaj tsis zoo los ntawm koj xaiv cov tshuaj txhuam hniav, nws yuav nyob ntawm qhov cwj pwm ntawm kev tu koj cov hniav yav tom ntej. Yog li, rau cov me nyuam yaus muaj hnub nyoog 6 xyoo, koj tuaj yeem yuav cov tshuaj txhuam hniav tshwj xeeb uas muaj ntau hom txiv hmab txiv ntoo thiab khoom qab zib, thiab cov menyuam loj dua tuaj yeem siv tsev neeg cov tshuaj txhuam hniav. Tab sis qhov tseem ceeb tshaj plaws kom nco ntsoov yog thaum txhuam koj tus menyuam, qhov tseem ceeb tshaj plaws yog los tswj nws, vim tias cov tshuaj tua kab mob thiab cov tshuaj txhuam hniav tom qab pib li 2 feeb, yog li ua kom nco ntsoov tias koj tus menyuam ua raws li cov cai ntawm kev ntxuav koj cov hniav.
Siv tshuaj txhuam hniav rau me nyuam yaus, tshwj xeeb, xav tau ntau ntxiv, tshwj xeeb tshaj yog xav txog kev nyab xeeb, yog tias tus me nyuam tau nqos cov tshuaj txhuam hniav. Hauv kev txiav txim tias, thaum muaj ib qho muab tshuaj zom zaws mus rau hauv plab, nws tsis muaj ib qho tshuaj lom rau lub cev, nws yuav tsum tsis txhob muaj cov tshuaj phem.
Txog rau hnub tim, tsis muaj cov tshuaj txhuam hniav zoo kawg nkaus rau cov me nyuam yau, thiab qhov teeb meem ntawm nws qhov kev tsim no tseem qhib. Ua ntej, cov tshuaj txhuam hniav rau me nyuam yuav tsum muaj cov tshuaj fluoride rau cov kab mob tshiab, cov hniav tshiab hauv cov me nyuam, thiab qhov thib ob, cov tshuaj txhuam hniav rau cov me nyuam yaus tsis tuaj yeem muaj qhov tshuaj fluoride zoo, vim hais tias thaum tus txheej txheem ntxuav, tus me nyuam yuav nqos cov tshuaj.
Yog li, cov cai hauv qab no yuav raug rau cov menyuam cov tshuaj txhuam hniav:
- Cov tshuaj txhuam hniav yuav tsum muaj cov tshuaj fluoride tsawg, tshwj xeeb tshaj yog tias cov tshuaj txhuam hniav no yuav raug muab ntxuav los ntawm cov menyuam yaus tshaj 6 xyoo. Yog li, niaj hnub no, ntau lub khw tsim cov tshuaj txhuam hniav nyob rau hauv cov tshuaj siv tau. Cov ntsiab lus ntawm cov tshuaj fluoride hauv tus mos liab txhuam hniav yuav tsum tsis pub tshaj 0.05%.
- Cov tshuaj txhuam hniav rau me nyuam yaus yuav tsum qis qis dua. Yog li, rau cov me nyuam yaus helium hniav txhuam hniav zoo dua, uas tsim nyog rau cov hniav ib ntus thiab cov qes qaub neeg tsis haum ntawm tus hniav laus.
- Dua li ntawm qhov tseeb tias cov tshuaj txhuam hniav sib txawv nrog cov txiv hmab txiv ntoo sib txawv ua qhov kev txhuam hniav rau cov me nyuam yaus kom txaus, tab sis ntau dua qhov teebmeem tsw qab yuav tsis ua rau muaj kev nqos cov tshuaj txhuam hniav.
- Thiab qhov tseeb, cov tshuaj txhuam hniav rau me nyuam yaus yuav tsum muaj qhov zoo nkauj thiab nyiam siv txawm rau cov me nyuam yaus tshaj plaws.
Thiab thaum kawg, peb rov nco ntsoov koj, saib xyuas kom koj cov me nyuam tsis nqos cov tshuaj txhuam hniav, vim cov menyuam me tsis tau paub tias lawv ntxuav lawv cov hniav, li 40% ntawm qhov muab tshuaj yog nqos. Yog li, koj tsis tuaj yeem siv cov tshuaj txhuam hniav rau cov menyuam yaus, tsuas yog thaum lawv muaj hnub nyoog 12 xyoo, koj tuaj yeem thov tsev neeg cov tshuaj txhuam hniav. Thiab feem ntau tseem ceeb, tsis muaj cov ntaub ntawv yog qhov tsis zoo rau cov me nyuam siv cov tshuab ntxuav hniav dawb.