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    Properties of Titanium Dental Implant Models made by Laser Processing

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    Authors
    Laoui, Tahar
    Santos, Edson Costa
    Shiomia, Masanari
    Morita, M.
    Shaik, S. K.
    Tolochko, Nikolay K.
    Abe, F.
    Takahashi, M.
    Issue Date
    2006
    
    Metadata
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    Abstract
    This 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.
    Citation
    Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, 220(6): 857-863
    Publisher
    Professional Engineering Publishing
    Journal
    Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science
    URI
    http://hdl.handle.net/2436/29562
    DOI
    10.1243/09544062JMES133
    Additional Links
    http://journals.pepublishing.com/content/15446307q8p2n451/
    Type
    Journal article
    Language
    en
    ISSN
    09544062
    ae974a485f413a2113503eed53cd6c53
    10.1243/09544062JMES133
    Scopus Count
    Collections
    Faculty of Science and Engineering

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