Cov txheej txheem:

Kev siv cov hniav yog dab tsi?
Kev siv cov hniav yog dab tsi?

Video: Kev siv cov hniav yog dab tsi?

Video: Kev siv cov hniav yog dab tsi?
Video: Qhia kev siv ntawm tug suab zoo tshuaj dab tsi coob tug tsi tau paub siv 2024, Lub Xya hli ntuj
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Tib neeg cov hniav ua haujlwm rau cov khoom siv zom zom cov khoom noj los ntawm kev txiav thiab zom lawv hauv kev npaj rau kev zom thiab zom. Tib neeg muaj plaub hom cov hniav : incisors, canines, premolars, thiab molars, uas txhua tus muaj cov haujlwm tshwj xeeb.

Hais txog qhov no, cov hniav siv rau dab tsi?

Incisors - lub ntse ntse, chisel-puab pem hauv ntej cov hniav (plaub qaum, plaub sab) siv rau txiav zaub mov. Canines - qee zaum hu ua cuspids, cov no cov hniav yog zoo li cov ntsiab lus (cusps) thiab yog siv rau kua muag.

Ib yam li ntawd, koj cov hniav thiab cov pos hniav ua haujlwm li cas? Gingivae ( cov pos hniav ): Cov ntaub so ntswg mos uas nyob ib puag ncig cov hniav thiab pob txha. Nws tiv thaiv cov pob txha thiab cov hauv paus hniav cov hniav thiab muab ib qho yooj yim lubricated saum npoo. Pob txha: Muab a lub qhov (socket) nyob ib puag ncig thiab txhawb nqa lub hauv paus ntawm lub cov hniav.

Kuj tseem yuav paub, 4 hom hniav thiab lawv txoj haujlwm yog dab tsi?

Plaub hom tseem ceeb ntawm cov hniav yog:

  • Incisors - Koj incisors yog yim hniav nyob rau hauv pem hauv ntej ntawm koj lub qhov ncauj (plaub nyob rau hauv qab thiab sab saum toj).
  • Canines - Koj canines yog cov hniav tom ntej uas tsim hauv koj lub qhov ncauj.
  • Premolars - Premolars yog siv los rhuav thiab crushing zaub mov.
  • Molars - Koj cov molars yog koj cov hniav loj tshaj plaws.

Kev siv cov hniav molar yog dab tsi?

Cov Molars kuj yog siv rau zom thiab zom zaub mov. Thawj molars , kuj hu ua deciduous molars , tshwm sim ntawm 12 thiab 28 lub hlis, thiab raug hloov los ntawm thawj thiab thib ob premolars (plaub qaum thiab plaub qis) tau piav qhia saum toj no.

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