Cov kev kho hniav sib xyaw pib thaum tus me nyuam tau txais nws thawj tus hniav mus tas li, cov hniav tas mus lilos yog cov hniav laus yog cov hniav thib ob uas tsim los ntawm cov tsiaj nyeg diphyodont. https://en.wikipedia.org › wiki › Permanent_teeth
Txoj hniav tas mus li - Wikipedia
thiab txuas ntxiv txog thaum kawg tus menyuam hniav tau ploj lawm, uas feem ntau yog muaj hnub nyoog 12 xyoos. Thaum pib ntawm qhov sib xyaw ntawm cov hniav, tus menyuam yuav muaj cov hniav ntau dua li cov hniav tas mus li.
Kev kho hniav pib thaum twg?
Pib (me nyuam) cov hniav feem ntau pib tuaj thaum muaj hnub nyoog 6 hli, thiab cov hniav mus tas li feem ntau pib tuaj txog li 6 xyoo.
kev sib xyaw hniav txhais li cas?
Cov hniav sib xyaw yog the . lub sijhawm txhim kho tom qab qhov ua tiav thawj cov molars thiab incisors . tau tawg, thiab ua ntej . cov hniav uas tseem tshuav ploj lawm.
Yuav muaj pes tsawg tus hniav sib xyaw?
Lub sijhawm hloov pauv no yog hu ua theem sib xyaw hniav. Muaj 32 cov hniav tas mus lithiab lawv daj dua li cov hniav deciduous.
Tus neeg muaj hnub nyoog li cas pib muaj cov hniav sib xyaw ua ke?
Nws yuav siv sijhawm txog rau xyoo, ntawm hnub nyoog ntawm rau txog rau 12 xyoos, rau cov menyuam yaus poob lawv cov hniav (txiav) thiab nce lawv cov hniav mus tas li. Qhov no hu ua lub sij hawm ntawm "mixed dentition,"vim ntau lub sij hawm, cov me nyuam yuav muaj ob qho tib si thawj thiab cov hniav mus tas li.
