PURPOSE OF STUDY Aseptic loosening of total joint replacement (TJR) due to wear of ultra-high molecular weight polyethylene (UHMWPE) is regarded as one of the major problems in the field of arthroplasty. This work describes a newly developed method, called MORF, which completely describes the morphology of UHMWPE wear particles. The differences in wear particle morphology may help to elucidate ...

Introduction: A Vitamin E-stabilized, radiation cross-linked UHMWPE was developed to maintain oxidative resistance while eliminating the need for post-irradiation melting, which can result in lowered fatigue strength [1]. While diffusion after irradiation is used for introducing Vitamin E into UHMWPE, blending Vitamin E with UHMWPE resin and subsequently irradiating the consolidated mixture is ...

The impact response of body armor composed of a ceramic plate with an ultrahigh molecular weight polyethylene (UHMWPE) fiber-reinforced composite and layers of UHMWPE fibers shielding a block of ballistic gelatin has been experimentally and numerically analyzed. It is a surrogate model for studying injuries to human torso caused by a bullet striking body protection armor placed on a person. Pho...

Cross-linked polyethylenes are being introduced widely in acetabular cups in hip prostheses as a strategy to reduce the incidence of wear debris-induced osteolysis. It will be many years before substantial clinical data can be collected on the wear of these new materials. Silane cross-linked polyethylene (XLPE) was introduced into clinical practice in a limited series of acetabular cups in 1986...

BACKGROUND Tibial eminence fractures occur most commonly in skeletally immature children. Several techniques using physeal-sparing fracture fixation have been described, but their structural properties have not been evaluated. PURPOSE To determine the strength and resistance to displacement of physeal-sparing techniques used to fix tibial eminence fractures. STUDY DESIGN Controlled laborato...

To enhance the oxidation strength and crosslinking yield of ultrahigh molecular weight polyethylene (UHMWPE), its composites were prepared by mixing 1%, 2%, 3% (by wt.) magnesium silicate hydrous (sepiolite) during this study. These irradiated with 25 kGy 50 irradiation doses in open air. Subsequent to irradiation, characterized for updates structure, strength, degree while estimating values in...

Herein, we present the mechanical and piezoresistive behavior of MWCNT/UHMWPE nanocomposites processed via selective laser sintering (SLS) under tensile, flexural cyclic loadings. We show that uniform dispersion MWCNTs in UHMWPE enhances crystallinity (+10% for 0.5 wt% MWCNT) decreases porosity (as evidenced by μCT images), evincing lowest (∼1%) highest tensile strength 20.3 MPa which is ∼ 45% ...

In prosthetic joints, frictional heating may cause protein denaturation in synovial fluid which affect its lubrication properties. arthroplasty, conventional ultra-high molecular weight polyethylene (UHMWPE) is being gradually replaced by vitamin E stabilized, extensively cross-linked UHMWPE (VEXLPE) with a superior combination of wear and oxidation resistance. There scarcity literature on vs.V...

Abstract In order to predict the ballistic limit of ceramic/ UHMWPE composite protection, a theoretical model ceramic/UHMWPE protection for projectile was established based on A-T and fiber energy dissipation model. impact process, fragments will experience ceramic dwell, fragmentation layer dissipation. The obtained is compared with experimental simulation results. results show that residual v...