Lub thaj tsam ntawm tus hniav saum cov pos hniav(tseem hu ua lub kaus mom lossis " cheeb tsam coronal") yog npog los ntawm enamel, uas nyuaj dua li dentin, thaum lub hauv paus yog them los ntawm cov pob txha zoo li txhav cov ntaub so ntswg hu ua cementum. Dentin tiv thaiv lub pulp chamber thiab muab kev txhawb nqa rau enamel thiab cementum.
dentine nyob qhov twg?
Dentin lossis dentine yog txheej txheej ntawm cov khoom uas dag tam sim ntawd hauv qab cov hniav hniav. Nws yog ib qho ntawm plaub yam tseem ceeb ntawm cov hniav uas muaj xws li: Sab nrauv tawv enamel. Lub dentin hauv qab cov enamel.
4 hom dentin yog dab tsi?
Dentin kev faib tawm. Dentin suav nrog primary, secondary, thiab tertiary dentin. Raws li cov qauv, thawj dentin yog tsim los ntawm mantle thiab circumpulpal dentin.
Cov coronal dentin crown muab dab tsi?
Dentin tsim cov hniav ntawm cov hniav (ob leeg hauv cov yas thiab hauv paus). 2. Lub coronal dentin (crown) muab xim rau cov enamel overlyingVim lub translucency ntawm overlying enamel, lub dentin ntawm cov hniav muab cov dawb enamel crown nws underlying daj xim, uas yog ib tug translucency ntawm overlying enamel. tob tob hauv cov hniav mus tas li.
peb hom dentin yog dab tsi?
Type. Muaj peb hom dentin uas muaj xws li thawj, theem nrab thiab theem nrabSecondary dentin yog txheej txheej ntawm dentin uas yog tsim tom qab cov hniav hauv paus tiav. Tertiary dentin yog tsim los teb rau kev txhawb nqa, xws li muaj cov hniav lwj lossis hnav.
