PFM Choj rau ntawm cov hniav anterior

PFM Choj rau ntawm cov hniav anterior

Tus choj PFM rau sab hauv cov hniav sab hauv yog ib qho saum toj - Minych Minch kho Hniav Kev Kho Hniav Kev Kho Hniav. Lub hlau txuas ntxiv, feem ntau yog cov ntaub ntawv pov thawj los ntawm biocompomple alloys zoo li cobalt {{chromium- chromium, ua kom kawg lub zog kom tiv taus cov rog txhua hnub tom. Cov phiaj xwm sab nrauv sab nrauv, los ntawm cov xim zoo {{}} sib piv cov thev naus laus zis, ua raws li cov hniav muaj xim rau hauv cov xim, thiab, thiab cov lus txhais. Nws siv tau zoo nyob ntawm cov hniav uas ploj lawm, tsis tsuas yog rov qab zom ua haujlwm thiab kev hais lus meej tab sis kuj txhawb kev ua kom zoo nkauj tab sis kuj txhawb kom lub cev loog. Kev cai -}}} Cov qauv ua qauv kom haum rau cov qauv kev kho hniav meej, nws sib xyaw ua ke nrog cov hniav uas nyob ib sab, tsis txhob noj zaub mov tsis zoo. Ntxiv mus, nws txoj kev du yog yooj yim ntxuav, txo qhov kev pheej hmoo ntawm cov kab mob ntawm qhov ncauj. Muab lub ntuj {{{{{} saib luag nyav thiab txhim khu kev qha biting kev ua tau zoo, nws yog ib qho kev daws teeb meem rau kev kho tus hniav anterior.

Dab tsi cov hlau alloys feem ntau siv rau PFM choj txuas ntxiv? Ua cobalt - chromium alloys muaj txhua qhov zoo dua li nockel tshaj {} chromium rau sab hauv cov hniav?

Feem ntau siv cov hlau alloys rau kev ua kom yog ntawm PFM txuas hniav suav nrog alloting}}} chromium alloys, titanium alloys, thiab kub alloys. Piv rau npib tsib xee - chromium alloys, cobalt {{chromium alloys muaj ob peb qhov zoo rau anterior hniav:

Zoo dua biocompatibility: Cobalt - chromium alloys muaj zoo biocompatibility thiab qhov muaj feem tsis muaj kev fab tshuaj. Nickel - chromium alloys yuav cuam tshuam rau tib neeg kev noj qab haus huv thiab kev ua txhaum ntau dua thiab kev ua tsis haum rau tib neeg thiab kev sib daj sib deev.

Ntau Dua Kev Nyab Xeeb: Cobalt - chromium alloys muaj qhov ruaj khov ntau dua thiab muaj kev pheej hmoo txo ​​qis ntawm cov tshuaj tsis zoo. Nickel - chromium alloys, tshwj xeeb tshaj yog cov muaj beyllium, tej zaum yuav muaj qee yam toxicity.

Tsis tshua muaj peev xwm ua rau muaj kev sib koom ua ke: Cov hlau hluav taws xob ntawm cobalt - chromium alloys muaj qhov qis dua, thiab qhov tshwm sim ntau dua rau kev ua kom zoo nkauj ntawm cov hniav anterior.

Siab dua hardness thiab zoo hnav tsis kam tiv: Lub hardness ntawm cobalt - chromium alloys feem ntau yog siab dua li ntawm Nickoy tau zoo dua, thiab lawv cov kab mob chromium zoo dua, thiab lawv tuaj yeem ua kom muaj cov kab mob ntev ntawm PFM txuas ntxiv rau cov hniav me me.