Protein-metal interactions due to fretting corrosion at the taper junction of hip implants: An in vitro investigation using Raman spectroscopy.

Modular hip implants are a clinically successful and widely used treatment for patients with arthritis. Despite ongoing retrieval studies the understanding of the fundamental physico-chemical mechanisms of friction and wear within the head-taper interface is still limited. Here, we Raman-spectroscopically analyze structural features of the biotribological material which is formed within the taper joint between Ti6Al4V and low-carbon cobalt alloy or high-nitrogen steel surfaces in in vitro gross-slip fretting corrosion tests with bovine calf serum.

Spectroscopic Study of Strain, Oxidation, and Formation of Few-Layer Graphene at Steel Surfaces Tribologically Tested against MoS Films.

MoS not only has unique optoelectronic properties realizing photonic and semiconductor applications but also serves as a promising solid lubricant in tribological three-body contacts due to its advantageous friction and wear behavior. Its functionality is defined by elementary processes including strain, oxidation processes, and material mixing. However, these mechanisms were not elucidated for MoS having transferred from the MoS film synthesized at the main body to a steel counter body during tribological ball-on-disk tests.

Performance of Austenitic High-Nitrogen Steels under Gross Slip Fretting Corrosion in Bovine Serum.

Modular artificial hip joints are a clinical standard today. However, the release of wear products from the head-taper interface, which includes wear particles in the nm size range, as well as metal ions, have raised concerns. Depending on the loading of such taper joints, a wide variety of different mechanisms have been found by retrieval analyses.

Real-Time Learning Through Telemedicine Enhances Professional Training in Rural Emergency Departments.

The low volume and the intermittent nature of serious emergencies presenting to rural emergency departments (EDs) make it difficult to plan and deliver pertinent professional training. Telemedicine provides multiple avenues for training rural ED clinicians. This study examines how telemedicine contributes to professional training in rural EDs through both structured and unstructured approaches.

Tele-emergency behavioural health in rural and underserved areas.

Introduction: Challenges accessing behavioural health services in rural and underserved areas are compounded by severe shortages of behavioural health specialists, and difficulties placing patients. Tele-emergency (tele-ED) behavioural health is a promising solution for enhancing access to specialists and assisting in patient placement. This paper describes two tele-ED behavioural health models in the Midwest delivering mental- and substance use disorder services to rural and underserved adult populations.