Kev kho hniav hlau yog lub hauv paus tseem ceeb hauv cov hniav uas tshem tau ib feem (RPDs), ua lub hauv paus ruaj khov los txhawb cov hniav cuav thiab txuas rau cov hniav lossis cov hniav cog. Nws cov khoom xaiv tseem ceeb: cov kev xaiv zoo tshaj plaws yog cobalt-chromium (Co- Cr) alloys (sib npaug ntawm lub zog, corrosion resistance, thiab nqi, dav siv), titanium (lub teeb yuag, siab biocompatibility, zoo tagnrho rau cov hlau- cov neeg mob rhiab heev), thiab kub alloys (ductile, check, tab sis kim dua).
Nws lub luag haujlwm tseem ceeb yog faib cov zom zom kom sib npaug, tsis txhob muaj kev puas tsuaj rau cov pos hniav thiab cov hniav ntuj. Nws siv clasps (hlau hooks) los yog precision attachments rau thauj tog rau nkoj rau cov hniav seem, kom ruaj ntseg thaum ua kom yooj yim tshem tawm los ntxuav. Muab piv rau cov cob-tsuas yog cov hauv paus, nws yog thinner (2-3mm), txo qhov ncauj txawv teb chaws lub cev thiab txhawb kev nplij siab.
Kev saib xyuas: Tsis txhob tom cov zaub mov nyuaj (xws li, txiv ntseej, pob txha) kom tsis txhob deformation. Ntxuav txhua hnub nrog ib tug mos- txhuam txhuam thiab cov hniav ntxuav hniav dawb, thiab hla cov khoom abrasive uas khawb cov hlau. Muaj kev kuaj hniav tsis tu ncua- nce txhua 6 lub hlis txhawm rau pom kev hnav thaum ntxov lossis xoob xoob- nrog kev saib xyuas kom raug, feem ntau nws kav li 5-8 xyoo.