Daim ntawv thov tus nqi ntawm hydroxyapatite stems los ntawm nws siab compatibility nrog tib neeg cov pob txha thiab nws cov cim lom thiab lub cev zog, muab nws ib tug irreplaceable kom zoo dua nyob rau hauv lub biomedical teb.
1. Homologous Composition nrog tib neeg pob txha: Ua tiav "Kev sib koom ua ke tsis sib haum"
Kwv yees li 65% ntawm cov khoom siv tsis zoo ntawm tib neeg cov pob txha yog hydroxyapatite. Cov qauv siv lead ua thiab cov tshuaj lom neeg muaj pes tsawg leeg ntawm ob qho tib si zoo sib xws, tso cai rau hydroxyapatite kom lees paub tias yog "tus kheej-cov khoom" los ntawm cov pob txha hlwb tom qab cog, zam kev tiv thaiv kab mob. Nws qhov Ca/P atomic ratio yog kwv yees li 1.67, zoo kawg nkaus sib piv ntawm cov pob txha, txhawb cov pob txha ntawm tes txuas, kev loj hlob, thiab kev sib txawv. Hauv peb cov kev sim tsiaj ua rau lub tsev kho mob orthopedic, tom qab 3D- luam tawm hydroxyapatite pob txha scaffolds tau cog rau hauv cov pob txha luav, fusion ntawm cov pob txha tshiab nrog lub scaffold tau pom nyob rau hauv 4 lub lis piam, thiab cov pob txha txuas ntxiv tau tsim hauv scaffold tom qab 8 lub lis piam.
2. Zoo heev Bioactivity thiab Osteoconductivity: Qhia cov pob txha Regeneration
Hydroxyapatite maj mam tso Ca²⁺ thiab PO₄³⁻ ions hauv lub cev kua. Cov ions no tsis yog tsuas yog ntxiv cov khoom siv tsis zoo uas xav tau rau cov pob txha metabolism, tab sis kuj tseem ua rau cov haujlwm osteoblast, txhawb kev tsim cov pob txha tshiab - qhov no yog nws "bioactivity." Nyob rau tib lub sijhawm, nws cov qauv ntxeem tau (porosity feem ntau tswj ntawm 50% thiab 80%) muab txoj hauv kev rau cov pob txha ntawm tes txav thiab xa zaub mov, ua tiav "osteoconductivity." Kev lag luam-cov kev daws teeb meem feem ntau xav tau hydroxyapatite scaffolds nrog qhov pore loj ntawm 100-500 μm (xws li pob txha pob txha loj hlob xav tau). Peb SLA ceramic tshuab luam ntawv tso cai rau kev tswj xyuas qhov pore loj sib txawv hauv ± 20 μm, kom ntseeg tau tias muaj txiaj ntsig zoo.
3. Biocompatibility zoo heev thiab kev nyab xeeb: Tsis muaj toxicity txaus ntshai
Hydroxyapatite tsis yog -cytotoxic thiab tsis yog -sensitizing, thiab nws cov degradation tus nqi hauv vivo yog tswj tau (feem ntau 5%-15% ib xyoos). Nws degrades maj mam thaum tsim cov pob txha tshiab, zam qhov teeb meem ntawm "scaffold residue cuam tshuam rau pob txha ua haujlwm." 3D-luam luam hydroxyapatite cov qauv kuaj rau lub tuam txhab biomaterials pom cov cell viability ntawm ntau dua 95% hauv kev kuaj cytotoxicity (MTT txoj kev), ua tau raws li GB / T 16886.5-2017 tus qauv rau biosafety ntawm cov ntaub ntawv kho mob.
4. Adjustable Mechanical Properties and Processability: Adaptable to Txawv Kho Scenario
Los ntawm kev kho qhov ntom, porosity, thiab cov khoom sib xyaw ntawm hydroxyapatite (xws li nrog collagen thiab chitosan), nws cov khoom siv kho tshuab tuaj yeem tswj tau: ntom ntom hydroxyapatite tuaj yeem ua tiav lub zog flexural ntawm 50-80 MPa (tsim kho cov pob txha tsis xws luag nrog qis load- patite tuaj yeem txo qhov muaj peev xwm ntawm hydroxyapatite). 10-30 MPa (tsim rau qhov chaw tsis muaj kev thauj khoom). Lub caij no, thaum cov hmoov particle loj tswj tau li ntawm 1-5μm, nws tuaj yeem npaj rau hauv slurry (viscosity Tsawg dua lossis sib npaug li 4000cP) haum rau photocurable ceramic 3D luam ntawv, ua kom meej molding ntawm cov qauv nyuaj.
