Abstract：
:The degree of metal ion dissolution from Ti-6Al-4V alloy hip replacement stems subjected to various mechanical and chemical surface pretreatments was analysed in vitro. High-dissolution rates were observed for nitric acid passivated samples that had been mechanically surface treated to increase the implant surface area. Significantly lower ion release levels were observed for mechanically treated samples which had been aged in de-ionised water. The application of an hydroxyapatite coating decreased the metal ion release from the nitric acid passivated samples (compared to the uncoated sample) and increased the metal ion dissolution from the aged samples. The dissolution behaviour of the samples is explained in terms of the diffusion processes occurring at the stem/solution interface and the morphological and chemical characteristics of the surface treated stems.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Browne M,Gregson PJdoi
10.1016/s0142-9612(99)00200-8keywords:
subject
Has Abstractpub_date
2000-02-01 00:00:00pages
385-92issue
4eissn
0142-9612issn
1878-5905pii
S0142-9612(99)00200-8journal_volume
21pub_type
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