This paper systematically reviews the research progress in field of influence air pollutants engine inlet on accelerated wear elements association: piston, piston rings, cylinder liner (P-PR-CL), and plain bearing (journal–panel). It was shown at outset that primary component pollution is road dust. Its main components are dust grains hard minerals (SiO2, Al2O3), which penetrate oil film area b...

due to availability of proper materials in landfills (at most parts of iran especially in kahrizak) and also less expenditure of this liner in comparison with other liners it can be count as an acceptable choice. different studies imply that one of the most important factors for soil liner selection is local conditions and also liner compatibility with generated leachate in studied site. hydrau...

Abstract Polymer-textile liner composites have potential applications in aerospace for reducing the abrasion damage of moving parts during operation owing to their self-lubrication, light weight, and high loading capacity. Herein, Au nanoparticles (AuNPs) are successfully loaded into lumen halloysite nanotubes (HNTs) construct an HNTs–Au peasecod core–shell nanosystem optimize wear resistance p...

In the dairy industry world wide, several hundred types of liners are used to milk dairy cows. The enormous amount of liner types with different characteristics in size, form, consistency and other design and manufacturing characteristics indicate that no ‘best’ liner has been identified in the last 60 or so years since machine milking has become the common method for milk harvesting. Mechanica...

BACKGROUND Press-fit implantation of a porous-coated hemispheric acetabular component without screws is an option for primary total hip replacement. The purpose of the present study was to evaluate the results of this technique after an average duration of follow-up of ten years to determine if there was any loss of fixation or increase in osteolysis over time. METHODS From June 1988 to Novem...

The purpose of this paper is to assess clinically and radiologically our experience with constrained acetabular components for the unstable hip following total hip replacement. From July 2006 to August 2012 we retrospectively reviewed the clinical and radiographic outcome of 22 arthroplasties, in 20 patients. The mean age at surgery of constrained acetabular component was 73 years (range, 35 to...

Although alumina has been used in orthopaedic surgery since the 1970s, the long-term clinical results of zirconia have not been well documented in vivo. We studied hips with these two different ceramics during the same period and with a minimum follow-up of ten years. Because the size of the alumina and zirconia heads was different, hips with 32 mm alumina heads and those with 28 mm zirconia he...

Cementless total hip replacement (THR) is rapidly being accepted as the surgery for arthritic diseases of the hip joint. The bone-ingrowth rate in porous-type cementless implants was about 90% over 10 years after surgery, showing that biological fixation of cementless THR was well maintained on both the stem and cup sides. As for the stress shielding of the femur operated using a distal fixatio...

It is hypothesized that structured sliding-surfaces improve the lubrication condition by forming an oil sump on sliding surface, redistributing oil, and trapping wear debris. For these reasons, have been used as a friction reduction method for long time. In this work, effects of microstructure laid cylinder liner internal combustion engine twin-land control ring (TLOCR) piston skirt were invest...

We reviewed the initial post-operative radiographs of the Trident acetabulum and identified a problem with seating of the metal-backed ceramic liner. We identified 117 hips in 113 patients who had undergone primary total hip replacement using the Trident shell with a metal-backed alumina liner. Of these, 19 (16.4%) were noted to have incomplete seating of the liner, as judged by plain anteropos...