Puas yog daus dawb cov hniav noj qab haus huv?

Ntau tus neeg yuav siv zog kom tau cov hniav dawb zoo li cov hnub qub, tab sis koj puas xav tias cov hniav dawb huv los yog cov hniav ivory noj qab haus huv?

Cov hniav zoo tshaj plaws Lawv yog cov hniav uas muaj xim daj ntseg, tsis muaj xim daj, xim dawb heev, cov hniav zoo yuav tsum yog xim av me ntsis, vim muaj cov fluorine thiab calcium, vim lawv muaj lub luag haujlwm tseem ceeb hauv kev ua kom cov hniav zoo nkauj thiab ua kom muaj zog thiab muaj zog.

Raws li rau Cov hnub qub muaj cov hniav tsis zoo uas yog npog nrog cov yas uas tuaj yeem ua tau ntawm txhua yam xim thiab muab tso ncaj qha rau ntawm cov hniav.

tej zaum yuav Ib txheej grey lossis daj tshwm rau ntawm cov hniav ntawm qee tus neeg, tshwj xeeb tshaj yog cov neeg haus luam yeeb, uas tsis ploj mus nrog kev tu tsis tu ncua, yog li lawv mus rau kev npaj tshwj xeeb rau kev tu cov hniav, thiab cov khoom no yuav tsum tau siv nrog kev ceev faj thiab qee zaum vim tias lawv muaj dej, oxygen, lossis cov khoom siv abrasive, uas muaj cov khoom me me uas Los ntawm kev tshem tawm cov txheej txheem sab nrauv ntawm cov hniav, thiab nrog kev siv ntau zaus, cov ntaub ntawv no ua rau cov hniav lwj (cov txheej txheem sab nrauv ntawm cov hniav) maj mam.

Nws yog txiav txim siab Cov hniav ntxuav hniav dawb tsuas yog ib qho kev ntsuas ib ntus thiab yuav rov qab los tom qab ib lub sijhawm luv luv rau nws cov xim dhau los, thiab tej zaum yuav ua rau nws cov xim zoo nkauj dua vim tias cov tshuaj muaj nyob hauv cov tshuaj bleaches ntawm cov ntxhia tseem ceeb calcium, phosphorous thiab fluorine pom nyob rau hauv. txheej txheej ntawm cov hniav, yog li cov kws kho hniav tsis pom zoo kom bleaching tsuas yog nyob rau hauv tej rooj plaub.

Source: Phau ntawv Beauty is Body and Soul.