Qhov sib txawv tseem ceeb ntawm cementocytes thiab osteocytes yog cov cementocytes yog cov hlwb uas tshwm sim los ntawm cementoblast nyob ib ncig ntawm cov hniav, thaum osteocytes tau kos rau hauv cov pob txha matrix tag nrho thiab pab kho pob txha.
Ib tus hniav muaj cov hniav enamel, dentin, cementum, thiab cov ntaub so ntswg. Cementum yog cov qauv zoo li pob txha thiab ib txheej nyias uas npog cov hauv paus hniav ntawm cov tsiaj txhu. Nws yog tsim los ntawm ib txheej ntawm cementum-tsim hlwb hu ua cementoblasts. Cov hlwb ntawm cov cementum uas nkag rau hauv lacunae yog hu ua cementocytes. Pob txha yog cov pob txha sib txuas uas muaj cov osteoblasts. Pob txha cov ntaub so ntswg yog remodeled thoob plaws nrog cov pob txha hlwb, uas pab nyob rau hauv cov pob txha resorption thiab tsim los ntawm osteoblasts. Osteocytes ua raws li orchestrators thiab mechanosensors nyob rau hauv cov txheej txheem ntawm cov pob txha remodelling.
Cementocytes yog dab tsi?
Cementocytes yog cementoblasts nyob rau hauv ib tus kheej tsim matrix. Cementoblast yog ib lub xovtooj ntawm lub hauv paus los ntawm cov hlwb follicular nyob ib ncig ntawm cov hauv paus hniav, thiab nws txoj haujlwm yog cementogenesis. Cementocytes nyob hauv ib qho mineralized extracellular matrix ntawm cellular cementum.
Daim duab 01: Cementum
Cementoblasts zoo ib yam li cov pob txha tsim osteoblasts, tab sis lawv txawv ua haujlwm thiab histologically. Cov hlwb ntawm cov cementum yog cov cementoblasts uas yog hu ua cementocytes. Txhua cementocyte nyob hauv nws cov lacuna. Cov lacunae no muaj canalculi lossis kwj dej. Txawm li cas los xij, cov canaliculi tsis muaj cov hlab ntsha. Ntxiv mus, lawv tsis tawg tawm sab nraud. Lawv taw mus rau lub ligament periodontal thiab muaj cov txheej txheem cementocytic kom diffuse cov as-ham los ntawm ligament vim nws muaj vascularized heev. Progenitor hlwb tam sim no nyob rau hauv periodontal ligaments pab rau cov mineralization ntawm cov ntaub so ntswg. Tom qab mineralization, cementoblasts poob lawv cov secretory kev ua si thiab ua cementocytes. Cementocytes ua lub luag haujlwm tseem ceeb hauv kev tswj hwm ntawm cellular cementum tsim thiab resorption.
Osteocytes yog dab tsi?
Ib qho osteocyte yog ib lub cell uas nyob hauv cov khoom ntawm cov pob txha tsim tag nrho. Nws nyob hauv ib chav me me hu ua lacuna, thiab nws nyob hauv ib qho calcified matrix ntawm cov pob txha. Osteocytes pib los ntawm osteoblasts, thiab lawv nyob ib puag ncig los ntawm cov khoom zais cia. Cov txheej txheem cytoplasmic tam sim no nyob rau hauv osteocytes ncua deb ntawm lub cell thiab mus rau lwm yam osteocytes los ntawm canaliculi. Cov canaliculi thauj cov as-ham thiab cov khoom pov tseg kom tswj tau qhov muaj peev xwm ntawm osteocyte.
Daim duab 02: Osteocytes
Osteocytes tseem ceeb heev vim tias lawv yog hom cell uas muaj ntau tshaj plaws nyob rau hauv cov pob txha paub tab. Lawv muaj lub neej ntev, yog li lawv muaj sia nyob ntev npaum li cov pob txha muaj nyob. Osteocytes muaj peev xwm rau pob txha deposition thiab resorption. Lawv kuj koom nrog hauv kev kho pob txha los ntawm kev xa cov teeb liab mus rau lwm cov osteocytes, txawm tias me me deformation ntawm pob txha. Qhov no ua rau cov pob txha muaj zog yog tias muaj kev ntxhov siab ntxiv rau cov pob txha. Osteocytes pab hauv kev tshem tawm calcium los ntawm cov pob txha yog tias lub cev calcium qis qis dua li qub. Kev tuag ntxov ntxov lossis kev ua haujlwm tsis zoo ntawm osteocytes yog txuam nrog cov kab mob xws li osteoarthritis thiab osteoporosis.
Dab tsi zoo sib xws ntawm Cementocytes thiab Osteocytes?
- Cementocytes thiab osteocytes nyob hauv ib qho mineralized extracellular matrix.
- Lawv dag hauv lacunae.
- Ob leeg muaj canaliculi.
- Ntxiv mus, ob qho tib si koom nrog hauv kev tsim thiab resorption.
Qhov txawv ntawm Cementocytes thiab Osteocytes yog dab tsi?
Cementocytes yog cov hlwb uas tshwm sim los ntawm cementoblast nyob ib ncig ntawm cov hauv paus hniav, thaum osteocytes tau kos rau hauv cov pob txha pob txha thiab pab txhim kho pob txha. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cementocytes thiab osteocytes. Tsis tas li ntawd, cementocytes tshwm sim los ntawm cementoblasts, thaum osteocytes tshwm sim los ntawm osteoblasts. Ntxiv mus, cementocytes muaj nyob rau hauv cov hauv paus hniav, thiab osteocytes muaj nyob rau hauv tag nrho cov pob txha nyob rau hauv lub cev.
Cov hauv qab no qhia txog qhov sib txawv ntawm cementocytes thiab osteocytes hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Cementocytes vs Osteocytes
Cementocytes yog cementoblasts nyob rau hauv ib tus kheej tsim matrix. Cementoblast yog ib lub cell uas tshwm sim los ntawm follicular hlwb nyob ib ncig ntawm cov hauv paus hniav. Nyob rau hauv tas li ntawd, ib tug osteocyte yog ib tug cell uas nyob rau hauv cov khoom ntawm ib tug tag nrho tsim cov pob txha. Nws nyob hauv ib chav me me hu ua lacuna, thiab nws nyob hauv ib qho calcified matrix ntawm cov pob txha. Cementocytes muaj nyob rau hauv cov hauv paus hniav, thiab osteocytes muaj nyob rau hauv tag nrho cov pob txha nyob rau hauv lub cev. Qhov sib txawv tseem ceeb ntawm cementocytes thiab osteocytes yog tias cementocytes tau kos rau hauv tus kheej tsim matric, hos osteocytes tau kos rau hauv cov pob txha matrix tag nrho.
