Kev xaiv cov hniav hniav tam sim no loj heev, tab sis nrog kev puas tsuaj ntawm cov hniav tsis tiav, cov hniav hniav yog cov nyiam tshaj plaws, uas tso cai rau koj tsis kam tshem tawm. Lawv yog tsim los ntawm ntau txoj kev, los ntawm cov khoom sib txawv, thiab qee zaum nws tuaj yeem nyuaj rau xaiv qhov yog.
Yuav ua li cas yog lub kaus mom thiab vim li cas nws thiaj xav tau?
Lub kaus mom yog ib hom kev kho hniav ruaj khov. Outwardly, nws rov zoo li tus hniav thiab, thaum ntsia, ua indistinguishable los ntawm cov hniav noj qab haus huv. Nws yog siv nyob rau hauv cov ntaub ntawv ntawm tsis tiav kev puas tsuaj ntawm cov hniav kom rov qab nws zom zog thiab aesthetic tsos, raws li zoo raws li tiv thaiv kev puas tsuaj ntxiv. Crowns yog txawv nyob ntawm seb cov khoom siv rau lawv siv. Lawv yog cov hlau, ceramic-hlau, yas thiab ceramic. Cov hlau tsis tshua muaj siv nyob rau hauv cov chaw kho mob niaj hnub no, vim tias lawv muaj qhov tsis zoo, thiab tsis haum rau cov hniav hauv pem hauv ntej.
Ceramic muaj qhov zoo li qub. Qhov no yog hom kim tshaj plaws ntawm cov yas, lawv yog ua los ntawm zirconium oxide. Yas yas yasyog siv los ua ib ntus prostheses, txij li thaum lawv tsis muaj durability thiab hnav tsis kam, lawv yooj yim raug rau txhua yam kev puas tsuaj thiab ua tsis tiav. Qhov no yog hom pheej yig tshaj. Porcelain-fused-to-hlau crowns muab kev zoo nkauj thiab lub zog, yog qhov nrov tshaj plaws piv rau lwm hom vim tias lawv cov practicality. Cov hniav hniav nyiaj hniav kub kuj txawv ntawm txoj kev uas lawv tau ua: muaj ib lub kaus mom thiab ib daim yas.
Samped crowns. Manufacturing cov ntsiab lus
Kev tsim cov kaus mom hlau tau siv ntau tshaj ib puas xyoo, ntau tus kws kho hniav xav txog cov txheej txheem no yav dhau los, tab sis, txawm li cas los xij, nws tseem siv tau, vim nws pheej yig heev. Cylindrical blanks ntawm txawv diameters yog ua los ntawm stainless hlau, los ntawm cov hlau crowns stamped rau tshwj xeeb cov cav tov. Cov khoom zoo li no yuav tsum muaj qee qhov zoo rau lawv qhov kev teeb tsa kom zoo thiab hnav zoo.
Lub kaus mom hlau yuav tsum haum raws li qhov loj ntawm cov hniav, npog nws kom nruj, tsis muaj qhov khoob thiab qhov khoob. Txwv tsis pub, nws yuav ua rau mob ntawm cov pos hniav, vim li ntawd, qhov no tuaj yeem ua rau atrophy. Rau ib tug nruj haum ntawm lub crown rau cov hniav thiab nws fixation, tshwj xeeb hniav cement yog siv. Lub crown yuav tsum tsis txhob mus tob rau hauv cov pos hniav, qhov no yuav ua rau cov pos hniav, xws li periodontitis. Tsis tas li ntawd, nws yuav tsum ua kom haum cov hniav zoo kom tsis txhob cuam tshuam qhov kev ncaj ncees ntawm kab, thiab ua qhov loj me kom tsis txhob raug mob. Khoomtsim los kho cov hniav ua haujlwm.
kauj ruam hauv kev ua ib lub kaus mom hlau
- Thawj zaug, qhov kev xav ntawm lub puab tsaig raug coj, kiag li.
- tom ntej, cov khoom xav tau yog qauv
- tau txais nyiaj muas
- lub kaus nws tus kheej yog ua
- khoom yog polished thiab polished
- Cov yas tiav yog muab tso rau ntawm cov hniav npaj ua ntej thiab kho nrog cov cement.
Indications thiab contraindications rau stamped crowns
stamped hlau crowns siv:
- Thaum qhov kev puas tsuaj ntawm cov hniav tsis tiav. Nyob rau hauv cov ntaub ntawv no, tus hniav yog hauv av rau qhov loj me, tag nrho nws cov tsis xws luag thiab carious lesions raug tshem tawm kom tiv thaiv kev puas tsuaj ntxiv.
- Yog tias tshem tau cov hniav cuav, xws li clasp lossis txuas hniav, yuav raug ntsia. Txhawm rau tiv thaiv cov hniav uas txhawb nqa, cov yas raug ntsia.
- Kho kom tus hniav puas lawm
Muaj qee qhov contraindications rau lawv siv:
- Bruxism (cov hniav sib tsoo uas tawg enamel).
- Kev puas tsuaj ntawm cov hniav, uas tsis muaj dab tsi yuav cawm tau.
- kab mob sib kis ntawm qhov ncauj.
Pros and cons of punched crowns
Qhov zoo ntawm punched crowns:
- Kev npaj cov hniav tsis tas yuav tsum tau siv sijhawm ntau, tig tau ua kom tsawg, vim tias cov phab ntsa ntawm cov yas nyias nyias. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog tias cov khoom txuas nrog cov hniav zoo uas yuav txhawb nqa cov hniav uas tshem tau.
- Qhov no yog kev kho mobtso cai rau koj khaws cov hniav noj qab haus huv thiab zam kev rho tawm.
- Ib lub kaus mom tuaj yeem siv tau rau hauv cov xwm txheej uas tsis tuaj yeem siv lwm hom kev sib txuas (piv txwv li, kev siv cov implants tsis tuaj yeem nqa tawm vim mob ntshav qab zib mellitus lossis lwm yam mob ntawm tus neeg mob).
- Ntawm no yog txoj kev pheej yig los ua thiab prosthetics, yog li nws dhau los ua kev cawm neeg txoj sia rau cov neeg tau nyiaj tsawg.
Disadvantages of stamped crowns:
- siv sijhawm ntev yuav hnav lub kaus mom thiab ua rau nws tsis ua haujlwm. Tom qab ntawd, cov khoom yuav tsum tau hloov nrog ib qho tshiab.
- Cov cement uas tuav lub kaus mom yaj lub sijhawm, uas ua rau xoob haum rau cov hniav thiab cov pos hniav. Qhov no, dhau los, tuaj yeem ua rau muaj kev puas tsuaj, kab noj hniav thiab cov hniav lwj vim kev noj zaub mov.
- Yog cov hniav puas tag, lub kaus mom yuav tsis pab ua haujlwm zom zaub mov.
- Ib tus choj stamped muaj qhov sib tsoo uas ua rau nws lub neej luv.
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws
Txoj kev niaj hnub ntawm kev casting tau ua rau nws muaj peev xwm tsim tau cov khoom zoo nkauj nyias-walled yas. Ib daim cam khwb cia yas yog siv los kho qhov zoo ntawm cov hniav puas, nws khaws cia, raws li kev txhawb nqa txuas hniav thiab tshem tau cov hniav hniav. Nws yog cam khwb cia los ntawm cob alt-chromium alloy, ua rau ib qho khoom tsis muaj adhesion. Txawm tias thaum tsim choj, soldering ntawm cov ntsiab lus tsis tas yuav tsum tau, cov qauv yog cam khwb cia tag nrho. Xws li cov yas yuav muajntau yam kev xaiv.
- Cov yas tsis muaj txheej, polished hlau.
- Gold plated crown. Tej zaum yuav ua rau muaj kev tsis haum tshuaj. Nrog ntev hnav, txheej yog erased.
- Ib daim yas yas yas. Lawv muaj ib tug cam khwb cia hlau thav duab thiab ib tug yas overlay muab ib tug zoo nkauj tsos rau tej yam ntuj tso hniav. Yog hnav tau ntev los yog tsis saib xyuas, tej zaum yuav tshwm sim.
- Hlau ceramics. Hom kim tshaj plaws ntawm cov yas, ruaj thiab zoo saib.
Indications for cast crowns:
- Kev puas tsuaj rau cov hniav.
- Pathology ntawm cov hniav zoo lossis qhov chaw.
- Muaj tseeb.
- Tooth size anomaly.
- Txhawm rau tshem tau thiab txuas hniav hniav.
- Tiv thaiv cov hniav abrasion, bruxism.
Qhov zoo ntawm cam khwb cia
- Qhov muaj peev xwm ntawm ib qho kev tsim khoom tsis yog tib neeg cov yas xwb, tab sis kuj txuas hniav, uas ua kom lub zog thiab hnav tsis kam ntawm cov khoom.
- Durability. Hnav cov yas zoo li no tuaj yeem kav ntev txog 10 xyoo yog tias cov khoom zoo thiab kev teeb tsa tau ua tiav ntawm qib siab.
- Ua sai thiab yooj yim.
- Ib-thooj cam khwb cia yog tsim ib tus zuj zus rau txhua tus hniav thiab haum txig rau hauv cov hniav hniav yam tsis ua rau tsis xis nyob rau hnav.
- Qhov tseeb ntawm tus qauv tsim tso cai rau koj los txhim kho lub yas kom nruj tsis muaj qhov khoob, uas tiv thaiv kev nkag mus ntawm cov kab mob thiab zaub mov hauv qab.nws.
- Rau cov hniav anterior, cov yas tuaj yeem coated lossis veneered rau qhov zoo nkauj. Lub kaus mom stamped tsis muab lub sijhawm zoo li no.
Qhov tsis zoo ntawm cov cam khwb cia
- Nyob rau hauv kev npaj rau lub installation ntawm lub crown, ib tug loj loj txheej ntawm cov hniav noj qab haus huv yog av.
- Qhov casting ntawm lub yas yuav tsum yog qhov tseeb heev, txwv tsis pub kev teeb tsa thiab hnav yuav muaj teeb meem.
- Thaum noj zaub mov kub lossis txias, qhov tsis xis nyob yuav tshwm sim vim yog cov khoom siv thermal conductivity siab.
- Tus nqi ntawm cov khoom zoo li no ntau dua li ntawm cov khoom stamped.
