Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode

Backside Wear Analysis of Retrieved Acetabular Liners with a Press-Fit Locking Mechanism in Comparison to Wear Simulation In Vitro

Backside wear due to micromotion and poor conformity between the liner and its titanium alloy shell may contribute to the high rates of retroacetabular osteolysis and consequent aseptic loosening. The purpose of our study was to understand the wear process on the backside of polyethylene liners from two acetabular cup systems, whose locking mechanism is based on a press-fit cone in combination ...

Investigation of non-catastrophic failure mode observed in SiC diodes

Power devices are widely used for the power handling portion of the electronic devices for space systems as well as ground-based commercial devices. In our previous study, we investigated the fatal destruction mode called single-event effects (SEEs) in the SiC schottky barrier diode (SiC-SBD) and SiC metal-oxide-semiconductor field-effect transistor (SiC-MOSFET). SiC is expected to be a candida...

Early failure mechanisms of constrained tripolar acetabular sockets used in revision total hip arthroplasty.

Fifty-eight patients received an Osteonics constrained acetabular implant for recurrent instability (46), girdlestone reimplant (8), correction of leg lengthening (3), and periprosthetic fracture (1). The constrained liner was inserted into a cementless shell (49), cemented into a pre-existing cementless shell (6), cemented into a cage (2), and cemented directly into the acetabular bone (1). Ei...

Fulminant hepatic failure due to metastatic choroidal melanoma

Application of centrifugal pump in right ventricular failure due to pulmonary artery hypertension. (A case report)

Background: It has not been yet developed a ost suitable method to treat right ventricular failure due to pulmonar artery hypertention resulted from ventricular arrhythia. Though some case reports about patients ready to heart transplant using left assist device or biventral assist device as bridge have been published in Journals, but nocase concerning application of centrifugal pump for treatm...