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Corrosion behaviour of PEEK or β-TCP-impregnated Ti6Al4V SLM structures targeting biomedical applications 被引量:6
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作者 M.M.COSTA T.A.DANTAS +4 位作者 F.BARTOLOMEU N.ALVES F.S.SILVA G.MIRANDA F.TOPTAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第12期2523-2533,共11页
Ti6Al4V cellular structures were produced by selective laser melting(SLM)and then filled either with beta-tricalcium phosphate(β-TCP)or PEEK(poly-ether-ether-ketone)through powder metallurgy techniques,to improve ost... Ti6Al4V cellular structures were produced by selective laser melting(SLM)and then filled either with beta-tricalcium phosphate(β-TCP)or PEEK(poly-ether-ether-ketone)through powder metallurgy techniques,to improve osteoconductivity and wear resistance.The corrosion behavior of these structures was explored considering its importance for the long-term performance of implants.Results revealed that the incorporation of open cellular pores induced higher electrochemical kinetics when being compared with dense structures.The impregnation ofβ-TCP and PEEK led to the creation of voids or gaps between the metallic matrix and the impregnated material which also influenced the corrosion behavior of the cellular structures. 展开更多
关键词 Ti6Al4V cellular structures corrosion multimaterial design poly-ether-ether-ketone(PEEK) beta-tricalcium phosphate(β-TCP)
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NiTi laser textured implants with improved in vivo osseointegration:An experimental study in rats
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作者 M.M.Costa A.Miranda +4 位作者 F.Bartolomeu O.Carvalho S.Matos G.Miranda F.S.Silva 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第19期120-130,共11页
Laser surface texturing is a versatile approach for manufacturing implants with suitable surfaces for os-seointegration.This work explores the use of laser to fabricate NiTi textured implants,testing two dif-ferent gr... Laser surface texturing is a versatile approach for manufacturing implants with suitable surfaces for os-seointegration.This work explores the use of laser to fabricate NiTi textured implants,testing two dif-ferent groove-based designs.Their performance was evaluated in vivo through implantation in Sprague Dawley rats’femur,being then analyzed after 4 and 12 weeks of implantation.Push-out experiments and histological characterization allowed to assess bone-implant bond and osseointegration and to compare the laser textured solutions with non-textured NiTi.Histology showed that,at 4 weeks of implantation,mainly immature woven bone was present whilst at 12 weeks a more mature bone had developed.Con-sidering the largest implantation time(12 weeks),results showed extraction forces considerably higher for textured implants(G2 and G3).Moreover,when comparing G2 and G3,it was found that G2(having the highest textured surface area)displayed the maximum extraction force among all groups,with an increase of 212%when compared to non-textured implants(G1).These results prove that the design and manufacturing technology are effective to promote an im-proved bone-implant bond,aiming the development of orthopedic implants. 展开更多
关键词 NITI Laser surface texturing In vivo studies OSSEOINTEGRATION IMPLANTS
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