Thaum enamel yog kwv yees li 85% ntxhia, ua ke nrog me me ntawm collagen, cov khoom siv organic thiab dej, dentin yog cov organic heev. … Dentin muaj li ntawm 45% ntxhia, nrog rau qhov seem ntawm cov organic teeb meem thiab dej.
Dab tsi tuaj thawj dentin lossis enamel?
Amelogenesis yog tsim cov enamel ntawm cov hniav thiab pib thaum lub kaus mom tsim thaum lub sij hawm lub tswb theem ntawm kev loj hlob ntawm cov hniav tom qab dentinogenesis tsim thawj txheej ntawm dentin. Dentin yuav tsum muaj nyob rau enamel tsim. Ameloblasts kuj yuav tsum muaj nyob rau dentinogenesis mus ntxiv.
Dab tsi yog kev ua haujlwm ntawm dentine thiab enamel?
Dentin txhawb nqa cov hniav enamel thiab pab txhawb cov qauv ntawm cov hniav, tab sis nws kuj ua lub luag haujlwm tseem ceeb hauv cov hniav. Dentin tsim cov txheej txheem ntawm cov hniav uas nyob ib puag ncig cov ntaub so ntswg, cov ntaub so ntswg uas ua rau sab hauv ntawm cov hniav.
enamel enamel yog dab tsi?
Enamel yog cov txheej nyias ntawm cov hniav. Lub plhaub tawv no yog cov ntaub so ntswg nyuaj tshaj plaws hauv tib neeg lub cev. Enamel npog cov yas uas yog ib feem ntawm cov hniav uas pom sab nraum cov pos hniav.
Kev sib txheeb ntawm enamel thiab dentin yog dab tsi thaum tsim?
Enamel tsim los ntawm cov kab mob enamel, uas yog muab los ntawm ectoderm, whereas dentin thiab pulp tsim los ntawm dental papilla, uas yog muab los ntawm mesoderm. … Txawm tias muaj ib qhoKev sib raug zoo ntawm cov enamel thiab dentin, nws yog cov hniav papilla uas zoo li muaj kev tswj caj ces ntawm cov hniav.
