Lub tsev kho mob xa rov qab ib pawg ntawm SLM- luam tawm cov cuab yeej phais. Lawv tsis ua haujlwm tsis zoo, tab sis tus neeg mob tau ntsib cov lus teb tsis txaus ntseeg. Kev tshawb nrhiav pom cov seem polishing compound nyob rau hauv micro- pores ntawm cov hlau 3D luam tawm qhov chaw.
Kev paug paug ntawm qhov chaw yog ib qho kev pheej hmoo tsis txaus ntseeg nyob hauvhlau 3D luam ntawvrau cov khoom siv kho mob. Thaum cov txheej txheem luam ntawv nws tus kheej tsim cov teeb meem tshwj xeeb, tshaj tawm - cov kauj ruam ua haujlwm feem ntau qhia lossis cov khoom siv khib nyiab uas cuam tshuam rau cov txheej txheem kev ua kom huv huv ntawm hlau. Qhov teeb meem no cuam tshuam txog kev cog qoob loo, cov cuab yeej phais mob, cov cuab yeej kuaj mob, thiab kev cai 3D luam tawm qauv kho mob.
Dab tsi yog Surface Contamination hauv Hlau 3D Printed Medical Devices?
Cov kab mob hauv npoo yog hais txog cov khoom txawv teb chaws tsis xav tau - cov khoom, tshuaj lom neeg, lossis cov khoom seem lom neeg - ntawm lossis kos rau hauv cov cuab yeej nto lossis cov yam ntxwv sab hauv. Cov hom muaj xws li cov hmoov metallic hmoov, cov tshuaj residues, abrasive media, thiab cov kab mob organic.
Contamination yog los ntawm:
Hmoov tuav thiab txheej txheem luam ntawv.
Tom qab{0}}kev ua haujlwm (blasting, machining, electropolishing, passivation).
Ntim, cia, thiab tuav.
Hlau 3D luam ntawv (tshwj xeeb tshaj yog SLM) tsim cov kev pheej hmoo tshwj xeeb piv rau kev ua haujlwm ib txwm muaj. Cov txheej txheem -los ntawm- txheej txheej txheej txheem tsim cov ntxhib, ntxeem tau nto nrog txoj hauv kev sab hauv thiab lattices uas ntxiab hais. Unmelted hmoov tuaj yeem nyob rau hauv nyuaj - mus rau - mus txog thaj chaw, tsis zoo li cov khoom siv smoother.
Unmelted titanium hmoov hais lodged nyob rau hauv sab hauv raws ntawm ib tug SLM pob txha ntsia hlau. Cov khoom no tom qab tso tawm hauv vivo, ua rau mob thiab cuam tshuam cov hlau 3D luam ntawv biocompatibility.
Feem ntau qhov chaw ntawm qhov chaw paug
Residual hlau hmoov: Tshwj xeeb tshaj yog muaj teeb meem nyob rau hauv cov qauv lattice thiab sab hauv.
Chemical residues: Los ntawm electropolishing da dej, passivation acids, los yog coatings.
Mechanical contamination: Bead{0}}blasting media, CNC khib nyiab, los yog polishing compounds.
Hla- paug: Los ntawm ntau- cov khoom tsim los yog cov khoom siv sib koom.
Ntim / tuav: Roj, cov khoom seem, lossis biofilm los ntawm tsis yog - ib puag ncig huv.
Cov ntaub ntawv rooj: Qhov chaw kis kab mob vs Qib Risk vs Detection nyuaj
|
Qhov chaw |
Risk Level |
Kev kuaj xyuas qhov nyuaj |
Feem ntau hauv |
|
Residual hmoov |
Siab |
Siab (internal) |
Cov kab, kab |
|
Tshuaj lom neeg |
Siab |
Nruab nrab |
Electropolishing / Passivation |
|
Blasting/Media |
Nruab nrab-High |
Nruab nrab |
Nto xov |
|
Hla - paug |
Nruab nrab |
Siab |
Ntau- khoom |
|
Kev tuav / ntim |
Nruab nrab |
Tsawg- Nruab nrab |
Ncej - ntxuav |
SLM electropolishing residue thiab hlau 3D luam ntawv hmoov paug yuav tsum tau nruj tswj hwm raukev cai 3D luam ntawv kho mob qauvkev huv.
Yuav ua li cas Deg Contamination Translates rau Tus Neeg Mob Risk
Cov kab mob paug tuaj yeem ua rau:
Inflammatory and immune responses: Metal particles ua rau txawv teb chaws - lub cev tshwm sim.
Accelerated ion tso tawm: Particles cuam tshuam passive oxide txheej, nce leaching.
Kev pheej hmoo kis tus kab mob: Cov residues txhawb kev tsim biofilm.
Mechanical teeb meem: Embedded hais ua raws li kev ntxhov siab concentrators ua rau tawg los yog hnav.
Kev cog hniav CoCr nrog cov hlaws dai -cov xov xwm blasting ua rau mob o, yuav tsum tau tshem tawm.
Cov ntaub ntawv rooj: Hom kab mob sib kis vs Clinical Risk
|
Hom kab mob |
Yam Tseem Ceeb |
Cov cuab yeej cuam tshuam |
|
Hlau Particles |
Inflammation, tso tawm ion |
Implants, screws |
|
Tshuaj lom neeg |
Cytotoxicity, ua xua |
Txhua yam implantable |
|
Organic/Biofilm |
Kab mob |
Cov cuab yeej phais, qauv |
Qhov no cuam tshuam ncaj qha rau SLM implant kev nyab xeeb thiab 3D luam ntawv kho mob cov cuab yeej muaj kev pheej hmoo.
Cov khoom siv -Kev pheej hmoo kis kab mob tshwj xeeb hauv Hlau 3D Printing
Titanium (Ti-6Al-4V): Oxide txheej cuam tshuam thiab hmoov nkag; zoo heev puag biocompatibility tab sis rhiab rau hais.
Stainless hlau 316L: Passivation tsis ua hauj lwm ua rau siab dua hlau / chromium tso tawm.
CoCr Alloys: Cobalt / chromium particle toxicity, nquag siv hauv orthopedic thiab kho hniav.
Nickel-raws li alloys: Sensitization txaus ntshai nyob rau hauv ntev - cog cog.
Cov ntaub ntawv rooj: Cov khoom vs Primary Risk vs Cleaning Protocol
|
Khoom siv |
Yam Tseem Ceeb |
Pom zoo ntxuav |
|
Ti-6Al-4V |
Hmoov ntim |
Ultrasonic + passivation |
|
316L SS AW |
Passivation teeb meem |
Acid ntxuav + validation |
|
CoCr |
Toxic particle tso tawm |
Kev tshem tawm tag nrho + yaug |
Ti-6Al-4V 3D luam ntawv kho mob, 316L stainless hlau khoom kho mob, thiab CoCr daim ntawv thov txhua qhov kev thov kom haum.
Yuav Ua Li Cas Tshawb Pom Qhov Nroj Tsuag - Kev Ntsuas Cov Txheej Txheem piav qhia yooj yim
Visual/Optical: SEM, nto profileometry rau hais thiab roughness.
Kev tshuaj ntsuam xyuas tshuaj: XPS/ESCA, EDX, ICP-MS rau cov khoom muaj pes tsawg leeg thiab cov ntaub ntawv pov thawj.
Kev kuaj huv huv: Kev suav cov particle, Total Organic Carbon (TOC).
Tshuaj lom neeg: Endotoxin (LAL) kuaj, cytotoxicity.
NDT rau sab hauv: Micro-CT, borescope rau cov channel.
Cov ntaub ntawv cov lus: Kev Tshawb Nrhiav Txoj Kev vs Daim Ntawv Thov
|
Txoj kev |
Tshawb pom |
Qhov zoo tshaj plaws siv rau |
|
SEM/EDX |
Particles, residues |
Nthuav dav |
|
XPS |
Nto chemistry |
Oxide / passivation |
|
Endotoxin (LAL) |
Pyrogens |
Kev cog hniav |
|
Micro-CT |
Internal paug |
Complex geometry |
Hlau 3D luam ntawv nto kuaj thiab endotoxin kuaj cov khoom siv kho mob hlau yog qhov tseem ceeb.
Ntxuav thiab Decontamination raws tu qauv rau hlau 3D luam ntawv kho mob qhov chaw
Ultrasonic tu: Siv tau rau cov duab tsis yooj yim tab sis yuav tsum tau ua kom zoo dua.
Passivation re-kev kho mob: Restores tiv thaiv txheej tom qab machining/polishing.
Validated cycles: Sib txawv rau implantable vs non-implantable.
Kev ntim huv huv: Qhov tseem ceeb rau kev tswj kom tsis muaj menyuam.
Leading hlau 3D luam ntawv manufacturers siv ntau- cov txheej txheem validated nrog rinsed pov thawj.
Cov ntaub ntawv lub rooj: Kev Tu Kev Siv Tau Zoo
|
Txoj kev |
Ti-6Al-4V |
316L / CoCr |
Kev ua tau zoo |
|
Ultrasonic |
Zoo |
Zoo |
Siab |
|
Passivation |
Zoo heev |
Zoo heev |
Siab |
|
Plasma / Tshuaj |
Zoo |
Zoo |
Nruab nrab-High |
Hlau 3D luam ntawv tu validation thiab SLM kho mob ib feem sterilization yog tsis yog -negotiable.
Cov lus nug nquag
Dab tsi ua rau muaj paug paug hauv cov hlau 3D luam ntawv kho mob?
Feem ntau cov hmoov seem, tom qab- cov tshuaj ua tiav, thiab tuav hauv qhov chaw uas tsis yog - tswj.
Koj ua li cas ntxuav cov hlau 3D luam ntawv cog ua ntej siv?
Multi-pab ultrasonic tu, passivation, huv si yaug, validation, thiab sterilization nyob rau hauv kev tswj tej yam kev mob.
Puas yog kev sib kis ntawm qhov chaw muaj kev pheej hmoo loj dua hauv SLM dua li hauv kev tsim khoom ib txwm?
Yog, vim muaj qhov roughness, porosity, thiab complex geometries uas ntxiab cov kab mob.
Cov kev ntsuam xyuas dab tsi pom muaj qhov paug paug hauv cov khoom siv kho mob hlau?
SEM, XPS, endotoxin (LAL), TOC, particle suav, thiab cytotoxicity.
Cov kab mob hauv qhov chaw puas tuaj yeem ua rau implant tsis ua haujlwm?
Tau - los ntawm kev mob, kis kab mob, loosening, los yog ceev corrosion.
Kuv yuav ua li cas thiaj paub yog tias kuv lub tuam txhab luam ntawv hlau 3D ua tau raws li cov qauv kev kho mob huv?
Thov kom paub meej cov ntaub ntawv pov thawj, thib peb -cov ntaub ntawv xeem ntawm tog neeg, thiab tshuaj xyuas lawv cov kab ke zoo.