Kev kho hniav yog ib lub koom haum tshwj xeeb uas muaj lub luag haujlwm los muab kev kho mob rau cov neeg mob kho hniav nrog lub hom phiaj tseem ceeb ntawm kev rov ua kom lub ntsej muag luag ntxhi lawv tau ploj vim muaj ntau yam teeb meem kho hniav thiab ua rau lawv txaus nyiam heev. HAHASMILE muaj ntau hom khoom siv kho hniav xws li zirconia blocks thiab lwm yam ntaub ntawv. Niaj hnub no peb yuav tham txog ib qho ntawm cov khoom no uas tau siv dav hauv ntau txoj kev kho hniav thiab kev phais.
Cov khoom tshwj xeeb no, hu ua PMMA blocks, muaj cov xim zoo nkauj zoo ib yam li cov hniav thiab tseem muaj biocompatibility zoo heev rau cov neeg kho hniav uas xav tau tshaj plaws. Tsis tas li ntawd, cov blocks no yog tsim los ntawm kev siv qhov kub thiab txias thiab kev kub ntxhov uas ua rau muaj txiaj ntsig zoo dua qub. Lawv kuj yog pob tshab los ntawm qhov xwm txheej thiab muaj nyob rau hauv A1, A2 thiab A3 xim, tsuas yog rau cov neeg mob uas xav hnav nws.
Keeb kwm keeb kwm
PMMA yog ib qho tsis muaj ntxhiab tsw acrylic polymer, thawj zaug qhia los ntawm Redtenbacher hauv 1843. Txawm li cas los xij, kev txhim kho PMMA rau biomedical applications yog cov txheej txheem maj mam siv sijhawm ntau xyoo. Txij li thaum xyoo 1940s, PMMA tau dhau los ua cov khoom siv biomaterial rau cov chaw kuaj hniav thiab cov chaw kho mob.
PMMA tau hloov cov ntaub ntawv uas siv cov hniav cuav yav dhau los vim qhov tau txais cov khoom xws li kev yooj yim ntawm kev ua, cov khoom siv tau zoo, kev zoo nkauj, kev ua haujlwm zoo thiab cov tshuaj lom neeg tsawg. Tag nrho cov ntaub ntawv kho hniav siv yav dhau los muaj qee qhov tsis zoo thiab kev tshawb fawb rau cov khoom siv hniav zoo nkauj tseem tab tom ua. Nyob rau hauv ib nrab ntawm lub xyoo pua 20th, PMMA tsis tsuas yog hloov lwm cov ntaub ntawv ntawm cov hniav nyiaj hniav kub, tab sis tau txais kev muaj koob meej hauv kev tsim ntau yam kev kho hniav thiab maxillofacial, nrog rau obturators, hniav hniav, ib ntus yas thiab txuas hniav.
Cov khoom ntawm PMMA
PMMA-raws li cov ntaub ntawv yuav tsum muaj qee yam khoom tsim nyog, nyob ntawm kev siv tshuaj lom neeg. Yog li, PMMA cov ntaub ntawv tau raug hloov kho thiab tshawb nrhiav ntau yam tshuaj, lom neeg, lub cev thiab cov khoom siv kho tshuab.
Kev kho hniav kho hniav yuav tsum tau ua nyob rau hauv ib qho chaw ntawm qhov ncauj uas tsis muaj kev cuam tshuam rau cov ntaub so ntswg ib puag ncig. Yog li ntawd, PMMA siv rau cov ntaub ntawv hauv cov hniav yuav tsum yog biocompatible thiab yuav tsum tsis txhob ua rau muaj kev khaus, toxicity lossis mutagenicity rau cov ntaub so ntswg ntawm qhov ncauj.
Nyob rau hauv cov nqe lus ntawm chemistry, PMMA yuav tsum tau heev insoluble nyob rau hauv qaub ncaug thiab qhov ncauj kua. Nws yuav tsum tsis txhob hnov qab txog cov as-ham, tab sis yuav tsum muaj tshuaj lom neeg rau cov hniav cuav.
Tsis tas li ntawd, qhov ci ntsa iab ntawm cov khoom no yog tsim rau CAD / CAM milling thiab muab cov khoom zoo polishing.
PMMA thaiv kuj tseem muaj cov xim ruaj khov nrog cov qib siab UV tiv thaiv thiab tsis muaj xim tseem ceeb los ntawm kev kuaj UV.
Restorative applications
Ntau hom polymers feem ntau yog siv rau ntau yam kev siv hauv kev kho hniav prosthetics. Polymethyl methacrylate (PMMA) feem ntau yog siv rau hauv cov ntawv kho hniav kho hniav, suav nrog kev tsim cov hniav cuav, cov hniav ntxuav hniav dawb, hniav hniav, obturators, orthodontic retainers, ib ntus lossis ib ntus, thiab cov hniav hniav cuav.
Lwm daim ntawv thov kev kho hniav rau PMMA suav nrog occlusal splints, luam tawm lossis milled castings, pwm rau kev npaj kho mob, thiab cov khoom siv kho hniav rau kev tshawb fawb. Cov yam ntxwv tshwj xeeb ntawm PMMA, xws li qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom siv rau cov ntaub ntawv kho hniav no.
Tsab ntawv xov xwm no muab kev tshuaj xyuas dav dav ntawm ntau yam thiab cov khoom ntawm PMMA biomaterials siv feem ntau rau kev siv kho dua tshiab. Yog tias koj tab tom nrhiav kev thaiv rau kev kho hniav kho hniav, thov mus saib hauv HAHASMILE lub vev xaib thiab tiv tauj peb, peb muaj tag nrho cov khoom koj tab tom nrhiav.
