Siab zog Zirconia

Kev taw qhia txog cov khoom siv

Nyob ib ncig ntawm 2009, txhawm rau txhim kho cov khoom siv kho qhov muag ntawm cov tsoos tetragonal zirconia ceramics, los ntawm kev txo qis ntawm alumina flux thiab tsim nyog nce qhov kub thiab txias kom txo tau qhov pores seem hauv cov khoom siv zirconia ceramic, zirconia yeej ua tiav qhov ntom ntom thiab sintering. Nws cov semi-pob tshab tuaj yeem txhim kho kom tsim nyog, kom nws muaj lub teeb xa hluav taws xob zoo ib yam li cov dentin, thiab tuaj yeem siv rau kev tsim cov zirconia tag nrho thiab txuas hniav hauv cov hniav tom qab, tsis txhob muaj kev phom sij ntawm cov plooj (porcelain chipping). Qhov zirconia no yog hu ua thib ob - tiam zirconia ceramics, tseem hu ua ntom sintered tetragonal zirconia ceramics.

Since the crystal phase composition of the second-generation zirconia material is almost the same as that of the first-generation zirconia, the main crystal phase is still tetragonal zirconia (3Y-TZP), which maintains the high strength and high toughness of 3Y-TZP zirconia ceramics. When the first generation of white zirconia is gradually withdrawing from the market, compared with the third and fourth generation zirconia materials, the second generation zirconia has the best strength, so the second generation zirconia material is also called "" High-strength zirconia".

The second{{0}}generation zirconia all-ceramic materials generally use 3mol percent (46wt percent ) of yttrium oxide as a stabilizer, the addition amount of alumina is reduced to less than 0.05wt percent , or almost no addition, the main crystal phase is tetragonal zirconia (3Y-TZP), the grain size is 0.5μm1.0μm, the content of cubic zirconia is less than 15 percent , and the semi-permeability is improved compared with the first generation of zirconia (studies show that the TP value of zirconia with a thickness of 1.0mm is 1520), good mechanical properties, bending strength of 9001300MPa, fracture toughness of about 3.54.5MPa.m1/2. Although the light transmittance of the second-generation zirconia material has been improved, it can basically meet the requirements of most restorations in the posterior tooth area with low aesthetic requirements, but if the second-generation zirconia material is used for full oxidation in the aesthetic area Zirconium repair, its semi-permeability still needs to be further improved.

Daim ntawv thov kho mob

Qhov thib ob -tiam zirconia tag nrho- cov khoom siv ceramic tuaj yeem siv tau rau txhua qhov -zirconia crowns thiab txuas hniav hauv cheeb tsam tom qab, tag nrho -ceramic hauv qab crowns hauv cheeb tsam anterior, thiab peb-unit los yog plaub-unit choj nyob rau hauv lub anterior thiab posterior hniav. Tam sim no nws yog cov khoom siv tseem ceeb rau tag nrho -zirconia restorations.

Cov khoom sawv cev

Cov neeg sawv cev ntawm cov khoom siv thib ob ntawm zirconia ceramics suav nrog PrettauZirconia (PRT) (Zirkonzahn, Taufers, Ltalis), BruxzirZirconiaBRX (Glidewell Laboratories, Irvine, USA), WielandZenostarTranslucentZEN (IvoclarVivadent, Principalityofechnite), Y.V. Zirkonzahn, Taufers, Ltalis), LavaPlus (3MESPE), CerconHT (DentsplySirona), thiab lwm yam.