Ib tug pivot tus hniav yog ib qho kev kho hniav prosthesis tsim los ntawm tus kws kho hniav thiab kws kho hniav. Nws hloov cov hniav uas nws cov hauv paus hniav yog qhov zoo txaus kom haum rau tus pas nrig, feem ntau yog xim hlau, nws tus kheej txhawb nqa ib sab hu ua lub kaus mom.

Cov hniav pivot no tuaj yeem tsim tau ob txoj hauv kev:

- Nyob rau hauv ib qho thaiv glued nyob rau hauv lub hollows ntawm lub hauv paus.

- Nyob rau hauv ob qhov chaw: lub qia, ces lub ceramic crown. Cov txheej txheem no tau pom zoo ntau dua vim tias lub kaw lus zoo dua absorbs cov neeg kho tshuab kev nyuaj siab ntawm zom. 

Ib tug pivot tus hniav yog ua tau thaum lub ntuj cov hniav puas lawm hais tias nws pom ib feem, lub crown, yog tsis constructible nrog ib tug yooj yim inlay los yog ib tug hlau filling. Yog li ntawd, nws yog ib qho tsim nyog yuav tau ntxiv ib lub thauj tog rau nkoj uas lub crown yuav so. Cov ntsiab lus tseem ceeb ntawm tus hniav pivot, thiab lub crown feem ntau yog¹ :

• Kev raug mob los yog pob txha loj heev rau lwm yam kev tsim kho dua tshiab
• Advanced lwj
• Cov hniav tseem ceeb heev
• Mob hnyav dyschromia
• Kev mob hnyav ntawm cov hniav.

Crowns yog tsau prostheses uas yuav npog rau sab sauv ntawm cov hniav kom rov qab lawv cov qub morphology. Lawv tuaj yeem ua rau ntawm cov ntaub so ntswg uas tseem tshuav (ua tsaug rau kev npaj) lossis tsau rau cov hlau lossis ceramic "prosthetic stump": pivot, tseem hu ua tus ncej. Nyob rau hauv rooj plaub tom kawg, lub crown tsis yog glued, tab sis kaw rau ib tug pivot slipped rau hauv paus hniav.

Muaj ntau ntau hom crowns nyob ntawm qhov taw qhia, tab sis kuj raws li kev zoo nkauj thiab kev lag luam gradient muab rau tus neeg xav tau qhov haum ntawm lub crown.

Cam khwb cia hlau (CC). Ua los ntawm casting ib tug molten alloy, lawv yeej yog qhov tsawg tshaj plaws aesthetic thiab kim tshaj plaws.

Mixed crowns. Cov yas no ua ke 2 cov ntaub ntawv: ib qho alloy thiab ceramic. Nyob rau hauv vestibular encrusted crowns (VIC), lub vestibular nto yog them nrog ib tug ceramic. Nyob rau hauv cov hlau-ceramic crowns, ceramic kiag li npog cov hniav nto. Lawv yog cov zoo nkauj dua thiab pom tau tias kim dua.

Txhua-ceramic crowns. Raws li lawv lub npe qhia, cov yas no yog ua los ntawm ceramics, uas yog heev resistant. Lawv yog cov zoo nkauj tshaj plaws thiab kim tshaj plaws.

Cov txheej txheem zoo nkauj tsis yog qhov ntsuas nkaus xwb, txawm li cas los xij: lub kaus mom yuav tsum ua kom tau raws li qhov xav tau ntawm qhov ncauj kab noj hniav. Hlau reconstructions yog tam sim no dav siv txawm lawv unsightly sab: cov neeg kho tshuab zog thiab yooj yim ntawm ntau lawm nyob rau hauv lub laboratory hais lus rau lawv! Nyob rau hauv cov ntaub ntawv ntawm tus pivot hniav, lub crown no yuav tsum txuam nrog ib tug prosthetic cuav stump tsau, screwed los yog muab tso rau hauv lub hauv paus.

Thaum tus hniav puas dhau lawm, tom qab qhov kev puas tsuaj loj lossis kev poob siab muaj zog, kev siv dag zog feem ntau yog ua los txhawm rau txhawm rau txhawm rau kis tus kab mob thiab tshem tawm ib qho kev nkag siab ntawm cov hniav. Qhov no feem ntau yog tshem tawm cov hlab ntsha thiab cov hlab ntsha ntawm cov hniav uas muaj kab mob thiab ntsaws cov kwj dej.

Yog hais tias tus hniav tsuas yog ib feem puas, ua ntaub ntawv kom tau ib tug li niaj zaus, coj nws lub tswv yim thiab cam khwb cia hlau los yog ceramic-hlau prosthesis.

Tab sis yog hais tias tus hniav yog heev structurally puas, nws yog tsim nyog rau thauj ib los yog ob tug pivots nyob rau hauv lub hauv paus rau stabilize lub yav tom ntej crown. Peb hais txog "inlay-core" los tsim cov pob zeb cuav no kaw nrog cov cement.

Ob ntu yuav tsum tau ua kom ua haujlwm.

Zam thaum ua tau. Kev txiav txim siab rau cov hniav nrog lub hauv paus thauj tog rau nkoj yog yuav tsum tau ua tom qab ua tib zoo xav.². Lub realization ntawm anchors tsis yog tsis muaj kev pheej hmoo thiab cuam tshuam cov khoom uas tsis muaj zog ntawm cov hniav. Tseeb tiag, tsis sib haum xeeb rau txoj kev ntseeg tawv ncauj, nws tsis yog tus devitalization ntawm cov hniav uas yuav ua rau nws yooj yim dua.^{3 4}, tab sis qhov poob ntawm cov khoom tshwm sim los ntawm kev lwj lossis los ntawm kev phais mob. Thaum ua tau, tus kws kho mob yuav tsum yog li ntawd tig mus rau reconstruction ntawm tus hniav devitalized los ntawm ib tug tsawg mutilating crown thiab siv zog rau siab tshaj plaws cov ntaub so ntswg txuag.

Lub rooj zaum ntawm tus hniav pivot. Kev poob ntawm cov ntaub so ntswg txuas nrog lub anchoring ntawm cov pivots tuaj yeem ua rau txo qis tsis kam mus rau cov kev ntxhov siab txuas nrog lub occlusion, ua rau muaj kev pheej hmoo ntawm pob txha. Thaum qhov no tshwm sim, tus hniav tawm. Thaum tos rau lub teem caij ntsib kws kho hniav (yuav tsum tau!), nws yog ib qho tsim nyog los hloov nws ilv tom qab tau saib xyuas kom huv si hauv paus (ib lub qhov ncauj thiab lub dav hlau kho hniav yog tsim nyog) thiab tus pas nrig pivot. Txawm li cas los xij, nws yuav tsum tau muab tshem tawm thaum noj mov kom tsis txhob nqos nws: nws tsis zoo li yuav txhawb nqa qhov hnyav ntawm zom.  

Yog tias koj lub hauv paus tseem nyob tsis zoo, koj yuav raug muab rau tus pivot tshiab.  

Ntawm qhov tod tes, yog tias koj lub hauv paus muaj kab mob los yog tawg, nws yuav tsum tau xav txog kev cog hniav los yog tus choj.