Zirconia Ceramics 5Y-TZP
Nov 30, 2021
Kev taw qhia txog cov khoom siv
Yog hais tias cov ntsiab lus ntawm yttrium oxide raws li ib tug stabilizer (5 mol%) yog tsim nyog rau zirconia ceramics, cubic zirconia crystals yuav dhau los ua lub ntsiab siv lead ua theem ntawm zirconia cov ntaub ntawv, yog li cov semi-permeability zoo heev, yog li nws yog hu ua &. quot; super-permeable oxide" zirconium" Nyob rau tib lub sijhawm, vim nws cov ntsiab lus qis ntawm tetragonal zirconia crystals, tsis muaj theem hloov pauv thiab toughening mechanism, tsis tshua muaj zog thiab toughness, tsawg theem transformation tshwm sim nyob rau hauv tag nrho cov kub ntau yam ntawm sintering thiab txias, thiab cov khoom yuav luag tsis muaj volume hloov. , yog li ntawd ib txhia neeg yuav Nws yog hu ua" tag nrho stabilized zirconia".
Ultra-pob tshab zirconia tag nrho cov-ceramic khoom tsim tawm hauv xyoo 2015 siv 5 mol% (9-12 wt%) ntawm yttrium oxide ua tus stabilizer (5Y-TZP), thiab cov ntsiab lus alumina qis dua 0.05 wt%, lossis yuav luag tsis muaj qhov sib ntxiv, cubic theem oxidation Cov ntsiab lus ntawm zirconium siv lead ua yog ntau dua 70%, thiab cov ntsiab lus ntawm tetragonal theem yog tsawg dua 30%. Cov khoom siv' s semipermeability yog siab heev, ncav cuag ultra-pob tshab kev ua tau zoo (kev tshawb fawb pom tau tias TP tus nqi ntawm ultra-permeable zirconia nrog ib tug tuab ntawm 1.0 hli mus txog ntau tshaj 35), thiab lub dav bending zog txog 500 ~ 600 MPa, tawg toughness 2.2 ~ 2.7 MPa.m1/2.
Nyob rau hauv cov ntaub ntawv ntawm siab transparency thiab super pob tshab, thiab cov tsos ntawm ntau theem ntawm polymer dispersion, dispersed tag nrho cov-ceramic cov ntaub ntawv ntawm txawv xim tau tshwm sim. Cov khoom siv hluav taws xob sib txuas oxidation sib cais tuaj yeem ua kom yooj yim rau kev ua haujlwm pollination ntawm cov kws tshaj lij, thiab tib lub sijhawm ua rau tag nrho-ceramic crown muaj thiab lub teeb-transmitting maj mam cuam tshuam, uas tuaj yeem ua tau raws li qhov xav tau ntawm kev zoo nkauj ntawm dyeing thiab dyeing tag nrho. -ceramic crown nyob rau hauv aesthetic cheeb tsam.
Cov xim gradation yog meej thiab cov xim gradation yog intricate, xim gradation yog meej, theem yog meej, theem yog meej, thiab theem yog meej. Tsis ncaj ncees lawm (4Y zirconium oxide) thiab super pob tshab zirconium (5Y zirconium oxide).
Qhov tsis zoo ntawm cov xim sib cais-txheej txheej tag nrho-ceramic cov ntaub ntawv: Thaum lub sij hawm CAD tsim, qhov chaw ntawm lub crown nyob rau hauv txawv ceramic blocks yuav cuam tshuam rau lub zoo nkauj nyhuv ntawm lub crown; Kev tshawb pom ntawm qhov sib cuam tshuam ntawm cov xim txheej thiab cov khaubncaws sab nraud povtseg yuav cuam tshuam rau oxide txhaum Cov teeb meem xws li lub zog ntawm tag nrho cov-ceramic crowns xav tau kev tshawb fawb ntxiv thiab kev soj ntsuam.
Gradient xim dispersion yog tsuas yog siv rau kev kho ntawm heterochromatic tag nrho-ceramic crowns nyob rau hauv ntsuab cheeb tsam ntawm cov hniav anterior.
Daim ntawv thov kho mob
Lub semi-permeability ntawm plaub-tiam zirconia tag nrho cov-ceramic cov ntaub ntawv yuav luag zoo ib yam li cov magnesium disilicate ceramics, thiab cov aesthetics zoo heev, tab sis lub zog yog super-rhuab ceramics. Nws feem ntau yog siv rau anterior ib leeg yas thiab veneer restorations.
