期刊
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
卷 54, 期 -, 页码 123-130出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2015.09.010
关键词
Biotribology; Tribocorrosion; Ti6Al4V; PEEK; Sliding wear
资金
- FCT (Fundacao para a Ciencia e Tecnologia -Portugal) [UID/EEA/04436/2013, EXCL/EMS-TEC/0460/2012]
- Fundação para a Ciência e a Tecnologia [EXCL/EMS-TEC/0460/2012] Funding Source: FCT
In dentistry, prosthetic structures must be able to support masticatory loads combined with a high biocompatibility and wear resistance in the presence of a corrosive environment. In order to improve the simultaneous wear and corrosion response of highly biocompatible prosthetic structures, a veneering poly-ether-ether-ketone (PEEK) to Ti6Al4V substrate was assessed by tribocorrosion analyses under conditions mimicking the oral environment. Samples were synthesized by hot pressing the PEEK veneer onto Ti6Al4V cylinders. The tribocorrosion tests on Ti6Al4V or PEEK/Ti6Al4V samples were performed on a reciprocating ball-on-plate tribometer at 30 N normal load, 1 Hz and stroke length of 3 mm. The tests were carried out in artificial saliva at 37 degrees C. Open circuit potential (OCP) was measured before, during and after reciprocating sliding tests. The worn surfaces were characterized by scanning electron microscopy. The results revealed a lower wear rate on PEEK combined with a lower coefficient of friction (COF), when compared to Ti6Al4V. In fact, PEEK protected Ti6Al4V substrate against the corrosive environment and wear avoiding the release of metallic ions to the surrounding environment. (C) 2015 Elsevier Ltd. All rights reserved.
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