Zaj Dab Neeg ntawm Kev Kho Hniav Zirconia Blocks: Los Ntawm Cov Khoom Tsim Kho Tshiab rau Niaj Hnub No Digital Dentistry
Mar 23, 2018| Zaj Dab Neeg ntawm Kev Kho Hniav Zirconia Blocks: Los Ntawm Cov Khoom Tsim Kho Tshiab rau Niaj Hnub No Digital Dentistry
Kev txhim kho cov ntaub ntawv kho hniav ib txwm tau tsom mus rau kev txhim kho kev ua haujlwm, kev zoo nkauj, biocompatibility, thiab kev siv tshuaj kho mob. Tau ntau xyoo dhau los, cov ntaub ntawv kho hniav tau maj mam hloov zuj zus los ntawm cov khoom siv acrylic thiab hlau -raws li kev kho dua tshiab rau cov khoom siv ceramic uas ua los ntawm cov thev naus laus zis tsim khoom.
Ntawm cov ntaub ntawv no, cov hniav zirconia blocks tau siv dav hauv CAD / CAM workflows niaj hnub. Ua ke nrog kev kho hniav milling tshuab thiab sintering furnaces, zirconia blocks feem ntau yog siv rau kev tsim cov yas yas, txuas hniav, cog qoob loo- txhawb kev kho, thiab lwm yam kev kho hniav prostheses.
Kev taw qhia ntawm zirconia rau hauv kev kho hniav digital tau hloov txoj hauv kev ntau lub chaw kho hniav tsim kho, tso cai rau cov kws tshaj lij ua haujlwm nrog cov khoom siv tau zoo thiab cov txheej txheem tsim khoom ntau dua.
Evolution of Dental Restorative Materials
Thaum Ntxov Kev Kho Hniav Ceramics: Kev Txhim Kho ntawm Kev Kho Kom Zoo Nkauj
Thaum pib ntawm lub xyoo pua 20th, cov ntaub ntawv plooj (porcelain) tau pib nkag rau hauv kev kho hniav vim lawv cov hniav -zoo li lub ntsej muag thiab lub peev xwm los tsim kho hniav zoo nkauj.
Piv nrog rau cov ntaub ntawv rov qab ua ntej, cov plooj (porcelain) muab cov xim zoo dua qub thiab muaj txiaj ntsig zoo dua qub. Txawm li cas los xij, cov khoom siv kho hniav ib txwm muaj cov kev txwv hauv kev siv lub zog thiab kev puas tsuaj, tshwj xeeb tshaj yog thaum siv rau hauv cov chaw uas raug zom zom ntau dua.
Vim yog cov kev txwv no, cov kws tshawb fawb txuas ntxiv tshawb nrhiav cov ntaub ntawv tshiab uas tuaj yeem muab ob qho tib si zoo nkauj thiab txhim kho kev ua haujlwm zoo.
Hlau -Ceramic Restorations: Muab lub zog thiab zoo nkauj
Nyob rau xyoo 1960, hlau -ceramic restorations tau dhau los ua ib qho tseem ceeb hauv kev kho hniav kho hniav. Los ntawm kev sib txuas cov txheej txheem hlau nrog cov plooj (porcelain) txheej, cov kev kho kom zoo dua qub tau zoo dua qub piv nrog cov khoom siv plooj (porcelain restorations).
Tau ntau xyoo, cov hlau -ceramic crowns thiab txuas hniav tau siv dav hauv cov chaw kuaj hniav thiab cov chaw kho mob.
Txawm li cas los xij, nrog kev thov ntau ntxiv rau cov hlau- rov kho dawb, qee qhov kev txwv ntawm cov hlau -ceramic systems tau pom ntau dua:
Cov txheej txheem hlau sab hauv tuaj yeem cuam tshuam lub teeb kis tau tus mob.
Qee qhov xwm txheej tuaj yeem pom qhov tsos tsaus dua nyob ze ntawm qhov gingival margin.
Cov yam ntxwv kho qhov muag tau txawv ntawm cov hniav ntuj.
Qee cov neeg mob nyiam cov khoom siv ceramic yam tsis muaj cov khoom siv hlau.
Cov xwm txheej no tau txhawb kev tshawb fawb ntxiv rau tag nrho -cov ntaub ntawv ceramic.
Kev txhim kho ntawm Dental Zirconia
Zirconia, tseem hu ua zirconium dioxide (ZrO₂), maj mam dhau los ua cov khoom siv ceramic tseem ceeb hauv kev kho hniav vim nws cov khoom siv tshuab thiab biocompatibility.
Piv nrog rau ntau yam khoom siv ceramic, zirconia muab:
Siab flexural zog
Kev puas tsuaj zoo
Cov khoom siv tshuaj ruaj khov
Tsim nyog biocompatibility rau kev kho hniav
Ntau theem ntawm translucency los ntawm cov khoom muaj pes tsawg leeg thiab kev tsim khoom
Kev txhim kho ntawm CAD / CAM thev naus laus zis ntxiv nthuav dav daim ntawv thov ntawm zirconia hauv cov chaw kuaj hniav. Ua ntej-sintered zirconia blocks tuaj yeem milled rau hauv cov duab sib txawv thiab tom qab ntawd ua tiav hauv qhov cub sintering kom ua tiav lawv qhov kawg ntom ntom thiab cov khoom.
Niaj hnub no, zirconia blocks muaj nyob rau hauv ntau hom, nrog rau siab -lub zog zirconia, translucent zirconia, thiab multilayer zirconia. Cov ntaub ntawv sib txawv tuaj yeem raug xaiv raws li kev tsim kho dua tshiab, txoj hauj lwm hauv qhov ncauj kab noj hniav, thiab kev xav kom zoo nkauj.
Zirconia Blocks hauv Niaj hnub nimno CAD / CAM Kev Kho Hniav
Kev siv cov zirconia blocks yog txuas nrog cov kev kho hniav digital.
Cov txheej txheem zirconia raug kho dua tshiab suav nrog:
Digital Scanning → CAD Tsim → Zirconia Milling → Ntxuav → Sintering → Finishing → Staining / Glazing → Final Restoration
Txhua theem cuam tshuam qhov kawg ntawm kev kho dua tshiab. Milling raug cuam tshuam rau cov duab thiab haum, thaum cov txheej txheem sintering cuam tshuam rau yam xws li ceev, lub zog, shrinkage tswj, thiab optical yam ntxwv.