2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
4.4 Txhim kho hniav
Ntxiv mus, cov txha hniav laus lub cev yog tsim los ntawm txheej txha hniav laus epithelium , sab hauv txha hniav laus epithelium , stellate reticulum, thiab stratum intermedium thiab ua rau nce mus rau ameloblasts, uas tsim tawm txha hniav laus thiab ua ib feem ntawm txo cov txha hniav laus epithelium.
Ntxiv mus, puas txha hniav laus yog epithelium?
Sab hauv txha hniav laus epithelium , tseem hu ua sab hauv txha hniav laus epithelium , yog txheej txheej ntawm cov xovtooj ntawm tes uas nyob ntawm ntug uas ze tshaj plaws ntawm kev kho hniav papilla ntawm txha hniav laus cev hauv tus hniav txhim kho. Cov txheej no tau pom thawj zaug thaum lub hau hau, uas cov sab hauv no txha hniav laus epithelium cell yog pre-ameloblast cells.
Tom qab ntawd, lo lus nug yog, dab tsi yog cov hniav txha hniav laus ua los ntawm? Cov cog zuv tau teeb tsa ua peb ntu: cov hniav txha hniav laus, cov hniav hniav thiab lub hnab hniav los yog cov hauv paus hniav . Lub cev txha hniav laus yog tsim los ntawm txheej txheej txha hniav laus sab hauv, sab hauv txha hniav laus epithelium, stellate reticulum thiab stratum intermedium.
Tsis tas li kom paub, dab tsi ua rau txo qis enamel epithelium?
Cov txo cov txha hniav laus epithelium , qee zaum hu ua txo kho hniav epithelium cov ntaub so ntswg , hla cov hniav txhim kho thiab tsim los ntawm ob txheej: txheej ntawm ameloblast cells thiab txheej uas nyob ib sab ntawm cuboidal cells (sab nrauv txha hniav laus epithelium ) los ntawm cov hniav lamina. Cov txo cov txha hniav laus epithelium muaj xws li: Sab hauv txha hniav laus epithelium.
Dab tsi ua ntej txha hniav laus lossis hniav?
Amelogenesis. Amelogenesis yog tsim los ntawm txha hniav laus ntawm cov hniav thiab pib thaum lub yas tsim thaum lub sijhawm tswb theem ntawm kev txhim kho hniav tom qab kev kho hniav, cov ntaub ntawv a thawj txheej ntawm hniav . Txawm hais tias hniav yuav tsum muaj rau txha hniav laus los tsim, ameloblasts yuav tsum yog rau dentinogenesis txuas ntxiv mus.
Pom zoo:
Dab tsi yog CPT txoj cai los tshaj tawm cov pob txha pob txha xav tau ua rau pob txha pob txha thaum phais pob txha?
Pib 01/01/18, CPT code 20939 yuav tsum tau siv los tshaj tawm cov pob txha pob txha xav tau rau pob txha pob txha hauv kev phais pob txha
Dab tsi ua rau txo cov txha hniav laus epithelium?
Qhov txo qis ntawm cov enamel epithelium, qee zaum hu ua txo cov hniav epithelium, overlies ib qho kev tsim cov hniav thiab yog tsim los ntawm ob txheej: ib txheej ntawm ameloblast hlwb thiab cov txheej uas nyob ib sab ntawm cuboidal hlwb (sab nrauv enamel epithelium) los ntawm cov hniav lamina
Nws puas tuaj yeem rov kho cov hniav txha hniav laus?
Kua qaub tsis tsuas yog pab ntxuav cov zaub mov kom tsis txhob ua rau koj cov hniav, tab sis nws kuj neutralizes teeb meem acids. Cov xov xwm zoo yog, cov khoom suav nrog tshuaj txhuam hniav fluoride, tshuaj txhuam qhov ncauj fluoride, thiab kev siv tshuaj fluoride zoo tuaj yeem pab rov kho koj cov hniav txha hniav laus, yog tias kev tshem tawm lub cev raug ntes thaum ntxov
Tus txheej txheem txheej txheej txheej thaum ub zoo li cas?
Kev tsim cov txheej txheem thaum ntxov hauv lub blastocyst suav nrog kev sib koom ua ke ntawm kev sib koom tes thiab rov kho cov hlwb hauv epiblast. Cells overlaying Koller Sickle nyob rau tom qab kawg ntawm tus me nyuam qaib embryo txav mus rau kab nruab nrab, sib ntsib thiab hloov kev taw qhia mus rau nruab nrab ntawm epiblast
Kev kho mob txha hniav laus hypoplasia yog dab tsi?
Koj tus kws kho hniav tej zaum yuav xav siv tshuaj pleev tshuaj fluoride los pab tiv thaiv cov hniav. Nyob rau hauv cov ntaub ntawv ntawm rhiab heev, kab noj hniav, los yog hniav qauv uas qhia hnav, kev kho mob xaiv muaj xws li: Resin-bonded sealant. Qhov no tuaj yeem txhim kho hniav rhiab heev