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dc.contributor.authorLaoui, Tahar
dc.contributor.authorSantos, Edson Costa
dc.contributor.authorShiomia, Masanari
dc.contributor.authorMorita, M.
dc.contributor.authorShaik, S. K.
dc.contributor.authorTolochko, Nikolay K.
dc.contributor.authorAbe, F.
dc.contributor.authorTakahashi, M.
dc.date.accessioned2008-06-05T15:45:46Z
dc.date.available2008-06-05T15:45:46Z
dc.date.issued2006
dc.identifier.citationProceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, 220(6): 857-863
dc.identifier.issn09544062
dc.identifier.doi10.1243/09544062JMES133
dc.identifier.urihttp://hdl.handle.net/2436/29562
dc.description.abstractThis article discusses the influence of various process parameters on the characteristics of titanium dental implants made by laser-forming techniques involving both laser sintering and laser melting. The implant models have a porous surface structure to increase bone-osseointegration and a compact core to provide the required mechanical strength. Models in the shapes of rod and cone were built using a continuous wave (CW) laser yielding a threshold compressive force as high as 1000 N after a postsintering treatment in a vacuum furnace at 1200°C for 1.5 h. Using selective laser melting with the pulsed laser, the best parameters were found to be: scan speed of 6 mm/s, laser peak power of 1 kW, and hatching pitch of 0.4 mm yielding a tensile strength of 300 MPa and torsional fatigue strength of 100 MPa. To improve the surface wear resistance of the titanium models, laser gas nitriding using CW Nd:YAG laser was applied. The formed TiN layers had a sponge-like structure with a thickness varying from 30 to 60 μm. The hardness measured at ε20 μm from the surface varied from 1000 to 600 HV by changing the scan speed from 1 to 16 mm/s.
dc.language.isoen
dc.publisherProfessional Engineering Publishing
dc.relation.urlhttp://journals.pepublishing.com/content/15446307q8p2n451/
dc.subjectLasers
dc.subjectRapid manufacturing (RM)
dc.subjectTitanium
dc.subjectMetal melting
dc.subjectSintering
dc.subjectNitriding
dc.subjectGraded porous structure
dc.subjectDental implants
dc.subjectEngineering technology
dc.subjectModelling
dc.subjectProduct design
dc.subjectOsseointegration
dc.subjectBiomedical applications
dc.titleProperties of Titanium Dental Implant Models made by Laser Processing
dc.typeJournal article
dc.identifier.journalProceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science
html.description.abstractThis article discusses the influence of various process parameters on the characteristics of titanium dental implants made by laser-forming techniques involving both laser sintering and laser melting. The implant models have a porous surface structure to increase bone-osseointegration and a compact core to provide the required mechanical strength. Models in the shapes of rod and cone were built using a continuous wave (CW) laser yielding a threshold compressive force as high as 1000 N after a postsintering treatment in a vacuum furnace at 1200°C for 1.5 h. Using selective laser melting with the pulsed laser, the best parameters were found to be: scan speed of 6 mm/s, laser peak power of 1 kW, and hatching pitch of 0.4 mm yielding a tensile strength of 300 MPa and torsional fatigue strength of 100 MPa. To improve the surface wear resistance of the titanium models, laser gas nitriding using CW Nd:YAG laser was applied. The formed TiN layers had a sponge-like structure with a thickness varying from 30 to 60 μm. The hardness measured at ε20 μm from the surface varied from 1000 to 600 HV by changing the scan speed from 1 to 16 mm/s.


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