Txheej txheej kws kho hniav uas ze tshaj plaws rau cov hniav yog hu ua mantle dentin. Cov txheej txheem ntawm dentin no yog tshwj xeeb rau tus so ntawm thawj dentin. Mantle dentin yog tsim los ntawm qhov sib txawv ntawm odontoblasts tshiab thiab tsim ib txheej uas feem ntau yog 15-20 micrometers (µm) dav.
Dab tsi yog hom dentin?
Muaj peb hom dentin, primary, secondary thiab tertiary. Secondary dentin yog ib txheej ntawm dentin tsim tom qab lub hauv paus ntawm cov hniav yog kiag li tsim. Tertiary dentin yog tsim los teb rau qhov kev txhawb nqa, xws li kev tawm tsam carious lossis hnav.
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.
How tuab yog mantle dentine?
Nrog qee qhov kev hloov pauv, feem ntau hom tsiaj muaj ib txheej txheej mantle dentin, 15-30mm tuab, ntawm qhov chaw ntawm cov hniav hauv cheeb tsam coronal.,, Qhov no feem ntau yog ib txheej atubular, muaj ob peb nyias thiab nkhaus tubules..
Dab tsi yog Intertubular dentin?
Lub intertubular dentin, uas nyob nruab nrab ntawm cov tubules, yog a tsawg-calcified matrix uas muaj qee cov apatite crystals embedded hauv collagen matrix.
