Abstract：
:Medical implants used in oral and orthopaedic surgery are mainly produced from titanium. Their biological behaviour, e.g. osseointegration, essentially depends on both the chemical composition and the morphology of the surface. Modifications achieved by excimer laser irradiation of titanium samples were investigated in order to improve their surface characteristics so as to facilitate biointegration. To enlarge the effective interfacial area of bone-implant contact, holes were ablated by laser pulses of ns or sub-ps length. During ns ablation, crown-like projecting rims formed around the borders of the holes. Ultra-short (0.5ps) KrF excimer laser pulses were successfully applied to avoid these undesirable formations. Since a smooth dental implant surface is necessary to maintain a healthy connection with the soft tissues, laser polishing of samples was investigated, too. Irradiation with a series of ns laser pulses resulted in effective smoothing, as measured with atomic force microscope. X-ray photoelectron spectroscopy analysis of the laser-polished titanium surface revealed that laser treatment led to a decrease of the surface contamination and in thickening of the oxide layer. X-ray diffraction measurements demonstrated that the original alpha-titanium crystal structure was preserved.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Bereznai M,Pelsöczi I,Tóth Z,Turzó K,Radnai M,Bor Z,Fazekas Adoi
10.1016/s0142-9612(03)00318-1keywords:
subject
Has Abstractpub_date
2003-10-01 00:00:00pages
4197-203issue
23eissn
0142-9612issn
1878-5905pii
S0142961203003181journal_volume
24pub_type
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