Cov phij xej impression trays yog cov khoom siv kho hniav uas haum rau tus neeg mob lub qhov ncauj qhov ncauj qhov ntswg, tsim los ntes cov kev xav hauv lub cev kom raug rau kev kho hniav zoo li cov yas, cov hniav cuav, lossis cov hniav cog hniav. Tsis zoo li cov tais hauv Tshuag (ib qho -loj- haum-tag nrho), lawv ua kom pom kev haum, txo qhov sib txawv uas ua rau muaj kev cuam tshuam kev xav.
Lawv cov txiaj ntsig tseem ceeb suav nrog kev txhim kho qhov tseeb- ua raws li tus neeg cov hniav contours thiab cov ntaub so ntswg kom rov ua cov ntsiab lus zoo anatomical tseem ceeb rau kev sib tw. Lawv kuj txo cov neeg mob tsis xis nyob los ntawm kev zam dhau qhov siab ntawm cov pos hniav lossis lub puab tsaig, thiab txiav cov khoom pov tseg los ntawm kev tshem tawm qhov kev xav tau ntawm kev hloov pauv kev xav.
Cov txheej txheem tsim khoom feem ntau suav nrog kev tshuaj xyuas hauv lub cev lossis cov kev xav ua ntej ib txwm muaj, ua raws li CAD (Computer-Aided Design) kev hloov kho. Cov ntaub ntawv muaj ntau yam los ntawm biocompatible resins (ntawm 3D luam ntawv rau kev tsim khoom sai) rau cov hlau hnyav xws li txhuas, ntsuas qhov ntev thiab kev nplij siab. 3D- cov tais luam ntawv, tshwj xeeb, pab rau - thov kev tsim khoom nrog lub sijhawm luv luv.
Clinically, lawv yog indispensable rau complex tej teeb meem: tag nrho - lub qhov ncauj hniav hniav, implant- txhawb nqa prosthetics, thiab kho kom zoo nkauj kho kom zoo nkauj yuav tsum tau lub siab raug kev cai tais muab. Kev tsim lub tais kom zoo suav nrog cov khoom tuab txaus (2-3mm) thiab tuav cov grooves kom ruaj ntseg cov khoom siv, kom ruaj khov, npuas - ntes dawb.
Hauv cov ntsiab lus, cov tais kev xav tau txuas rau qhov sib txawv ntawm tus neeg mob- tshwj xeeb lub cev nqaij daim tawv thiab prosthetic precision, txhim kho kev txhim kho kev ua tiav thaum txhim kho kev kho mob thiab kev paub ntawm tus neeg mob.