Micromotion and fretting wear between bone and Ti-based alloys in stem and dental implants breaks the passive film and exposes the metal to the action of the complex surrounding medium, generating substantial amounts of debris and continuous Ti ion release. In this work, oxidation treatments at low temperatures (277 °C, 5 h) have been used to promote the formation of wear-corrosion resistant ti...

BACKGROUND The purpose of this study was to investigate the stability of dual-taper modular implants following impaction forces delivered at varying locations as measured by the distraction forces required to disassemble the components. METHODS Distraction of the head-neck and neck-stem (NS) tapers of dual-taper modular implants with 0°, 8°, and 15° neck angles were measured utilizing a custo...

Presently, LWR (light-water reactor) fuel cladding (tube) is made from Zr-base alloys (e.g., Zircaloy). However, in steam at temperatures above 1000 K (727 °C), these alloys oxidize rapidly, stripping oxygen from water molecules and producing hydrogen, which may cause explosion. Moreover, Zr-base alloys are prone to GTRF (“grid-to-rod” fretting) failure, in which flowinduced vibration of fuel r...

The behavior of different materials under macrotribological and nanotribological conditions has been compared. The materials, hydrogenated amorphous diamondlike carbon, highly ordered pyrolitic graphite, and mica, were submitted to a fretting test ~macrotribological behavior! and a combined atomic force microscopy/lateral force microscopy ~AFM/LFM! ~nanotribological behavior!. The coefficient o...

Fretting wear debris generated at the stem–cement interface has nowadays been considered to play an important role in the overall failure of cemented total hip replacement (THR). Those wear debris within a certain size range would transport along bone cement deficiencies to bone tissue, resulting in a significant bone resorption and subsequent aseptic loosening of the femoral component, which i...