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Improvements of Ultra-High Molecular Weight Polyethylene

second component of ultra-high molecular weight polyethy- lene (UHMWPE). UHMWPE has evolved as the dominant material of choice in total joint prostheses because of its bio- compatibility, relative superior friction, wear characteristics, ductility and impact load damping. The primary problem with UHMWPE in total hip ...

v34_1667.pdf

Improved Injection Molding of Ultra-High Molecular Weight

Ultra-high molecular weight polyethylene (UHMW-. PE) was injection molded using a microcellular injection molding (MIM) process to introduce supercritical nitrogen. (SC-N2) into the melt to decrease the viscosity of the polymer and improve processability while reducing degradation. Solid and foamed parts were produced ...

509.pdf

Ultrahigh Molecular Weight Polyethylene

Stein HL (1999) Ultra high molecular weight polyethyl- ene (UHMWPE). Guide to engineering plastics families: thermoplastic resins. Materials Park: ASM. International. pp 167–171. Steven MK (2004) The UHMWPE handbook: ultra- high molecular weight polyethylene in total joint replace- ment. Elsevier Acadamic Press ...

10.1007/978-3-642-40872-4_591-2.pdf

Notch fatigue of ultrahigh molecular weight polyethylene (UHMWPE

Feb 12, 2016 ... Notch fatigue of ultrahigh molecular weight polyethylene (UHMWPE) used in total joint replacements. Farzana Ansaria,n. , Bernd Gludovatzb, Adam Kozakc, Robert O. Ritchiea,b,d,. Lisa A. Pruitta. aDepartment of Mechanical Engineering, University of California, Berkeley, CA, USA. bMaterials Sciences ...

2016_Ansari_JMBBM_NotchFatigue.pdf

Conventional and Highly Crosslinked Polyethylene in Total Knee

Jul 16, 2017 ... Department of Orthopedic Surgery, University Hospital of Munich (LMU), Campus Grosshadern, 81377 Munich,. Germany ... As materials used for total knee arthroplasty (TKA) are subject to wear, for a substantial number of patients the ... ultra-high-molecular-weight-polyethylene (UHMWPE) [13]. Numerous ...

994ea1aa7bbd6c0d282f5deb2bffa7ece7e9.pdf

A Tribological Assessment of Ultra High Molecular Weight

Jun 30, 2016 ... the “gold standard” for joint replacement [3]. The polymer that has been used for the majority of these replacements is Ultra High Molecular Weight Polyethylene ( UHMWPE) or, more recently, its crosslinked form. Total joint replacement has been hailed as one of the great success stories in modern medicine ...

c07ade91d79173c3fe9e9984f8439169e20b.pdf

Mechanical and Tribological Properties of Zeolite-reinforced

Ultra-high molecular weight polyethylene (UHMWPE) reinforced with different loadings of zeolite particles were prepared using hot compression molding. The effects of ... range of applications includes artificial joint replacement component [ 3], lining for dump trucks, bumpers and siding for ships [1], sewage and gas pipes  ...

pdf?md5=79b91eaadc38799d4035391b21e2c4fc&pid=1-s2.0-S1877705813020067-main.pdf&_valck=1

Improving Joint Implant Efficacy and Durability

patient's serum and urine.1 Total health effects remain inconclusive, but concerns persist. ... (ultrahigh molecular weight polyethylene), commonly referred to as metal on poly. The majority of hip implants are already made of metal on UHMWPE. It is expected that ... years of clinical his- tory in joint replacement devices, the.

hals-byline-mddi-july-2012.pdf

Reduction of wear volume from ultrahigh molecular weight

Published by Wiley. Periodicals, Inc. J Orthop Res 26:460–464, 2008. Keywords: UHMWPE; vitamin E (D,L-a tocopherol); knee simulator; wear; debris. INTRODUCTION. Ultrahigh molecular weight polyethylene (UHMWPE) has been the most commonly used bearing material in total joint arthroplasty. Wear and oxidation-.

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Surfactant Effects on Structure and Mechanical Properties of

2 days ago ... In this study, the treatment of the silicate surface with a dry surfactant by joint mechanical activation ... nanofillers. The biotite was dried at 150 ◦C and then treated by joint mechanical activation in a .... Kurtz, S.M. The UHMWPE Handbook: Ultrahigh-Molecular-Weight Polyethylene in Total Joint Replacement; .

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Process Parameter Optimization for Hot Embossing Uniformly

Keywords: Total joint replacement; polyethylene; UHMWPE; embossing; texturing . 1. Introduction. In cases of major cartilage deformation in a joint, a total joint arthroplasty (TJA) is the primary solution. The most common bearing design for TJA is a metal CoCr component on an ultra- high molecular weight polyethylene  ...

pdf?md5=013f4f188b1e90668cc3933ca566acee&isDTMRedir=Y&pid=1-s2.0-S2212827117305504-main.pdf

Vanguard® Cruciate Retaining Knee Brochure

The UHMWPE Handbook: Ultra High Molecular Weight. Polyethylene in Total Joint Replacement. Elsevier Academic Press. San. Diego, CA. 2004. 7. Parks, N. et al. Modular Tibial Insert Micromotion. Clinical. Orthopaedics and Related Research. 356:10–15, 1998. 8. Sosa, M. et al. Micromotion Between the Tibial Tray and ...

vanguard-cruciate-retaining-knee-brochure.pdf

Short-term creep and recovery behavior of medical grade ultra-high

total knee replacements as tibial insert since early 1960s. Keywords: Medical grade UHMWPE; Tensile creep; Recovery; Viscoelastic material. Reference to this paper should be given in the following way: F. Metin, M. Cengil, Short-term creep and recovery behavior of medical grade ultra-high molecular weight polyethylene ...

fulltxt.php?ICID=1230755

Friction and Wear Behavior of Ultrahigh Molecular Weight

tion of surface active phospholipids onto UHMWPE to make it a more wear- resistant load-bearing material for total joint replacements. VC. 2010 Wiley Periodicals, Inc. J Biomed Mater Res. Part B: Appl Biomater 93B: 351–358, 2010. Key Words: ultrahigh molecular weight polyethylene. (UHMWPE), crystallinity, friction, wear, ...

Bruck AL et al, JBMR 93B , 351 (2010).pdf

The Effect of Workpiece Cooling on the Machining of Biomedical

Biomedical grade polymers are commonly used in applications where surface finish and dimensional accuracy are key, such as in total joint replacement and ... concentrates on the machining of Ultra High Molecular Weight Polyethylene ( UHMWPE) workpieces which have been pre-cooled before machining. Past work has ...

1-s2.0-S2212827115007015-main.pdf?sequence=1&isAllowed=y

The Effect of Workpiece Cooling on the Machining of Biomedical

Biomedical grade polymers are commonly used in applications where surface finish and dimensional accuracy are key, such as in total joint replacement and ... concentrates on the machining of Ultra High Molecular Weight Polyethylene ( UHMWPE) workpieces which have been pre-cooled before machining. Past work has ...

1-s2.0-S2212827115007015-main.pdf?sequence=1

The Effect of Adding Calcium Stearate on Wear-resistance of Ultra

In order to find an effective solid lubrication filler for the composites based on ultra-high molecular weight polyethylene, tribotechnical properties of UHMWPE and its blends with calcium stearate (С36Н70СаО4, CS) under dry friction, boundary lubrication and abrasion were studied. It is demonstrated that wear rate of ...

82240063.pdf

Journal of Biomechanical Science and Engineering

Ultrahigh molecular weight polyethylene (UHMWPE) is the popular material of choice for use as a bearing surface in total joint replacement (TJR). Despite an extremely low friction coefficient of UHMWPE to metals with liquid lubrication, however, wear and fatigue fractures are major problems limiting the durability of.

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ultra high molecular weight polyethylene acetabular cups

The total joint replacement (TJR) is a common treatment in degenerative joint diseases. A conventional TJR consists of metallic implant convex component. ( fabricated from cobalt-chromium or titanium medical grade alloys) articulating against an ultra-high molecular weight polyethylene (UHMWPE) concave component [1].

A19.pdf

Improving the Finite Element Simulation of Wear of Total Hip

The advanced model of wear in the spherical joint of total hip prosthesis comprising an acetabular cup of ultra-high molecular weight polyethylene ( UHMWPE) in combination with a metal or ceramic femoral head is developed. The wear model is based on the classical Archard-Lancaster equation in common with all other ...

068.pdf