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Sunday, August 2, 2020 | History

4 edition of In vitro degradation of ultra high molecular weight polyethylene ((UHMWPE) by oxidative and/r hydrolytic processes found in the catalog.

In vitro degradation of ultra high molecular weight polyethylene ((UHMWPE) by oxidative and/r hydrolytic processes

Angela Wai-Wai Lee

In vitro degradation of ultra high molecular weight polyethylene ((UHMWPE) by oxidative and/r hydrolytic processes

by Angela Wai-Wai Lee

  • 40 Want to read
  • 11 Currently reading

Published by National Library of Canada in Ottawa .
Written in English


Edition Notes

Thesis (M.Sc.) -- University of Toronto, 1998.

SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
FormatMicroform
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL19223131M
ISBN 100612341151
OCLC/WorldCa46573090

Ultra-high-molecular-weight polyethylene is within the scope of WikiProject Polymers which aims to improve the coverage of polymer-related articles in you are interested, you may visit the project page and join with us. Feel free to leave messages at the project talk page. The opaque white UHMW sheet has a standard tolerance and meets American Society for Testing and Materials ASTM D, D, and D specifications. UHMW (ultra high molecular weight) polyethylene is an impact-, chemical-, and moisture-resistant plastic that has excellent abrasion resistance and a low-friction surface/5(25).

Ultra-high molecular weight polyethylene. the material and its use in total joint implants. J Bone Joint Surg Am. ;76(7)– PubMed Google ScholarCited by: 2. Featuring an ergonomic single curve, our PE (Polyethylene) Level III armor is not only affordable, but high performing, comfortable, and light weight. Wrapped in a water-resistant nylon cover with edge impact padding increases durability. Manufactured in the USA, in 10” x 12”, this armor has a profile of ” thick and carries a 5-year 87%(3).

Ultra high molecular weight polyethylene - Chemical Compound (UHMWPE) UHMWPE is a subset of the thermoplastic polyethylene. It has extremely long chains resulting in a very tough material, with high impact strength. Its coefficient of friction is comparable to that of PTFE (Polytetrafluoroethylene) but it has better abrasion resistance. F Specification for Polyethylene Plastics for Medical Applications. F Specification for Implantable Epoxy Electronic Encapsulants. F Specification for Ultra-High-Molecular-Weight Polyethylene Powder and Fabricated Form for Surgical Implants. F Classification for Vinyl Chloride Plastics Used in Biomedical Application.


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In vitro degradation of ultra high molecular weight polyethylene ((UHMWPE) by oxidative and/r hydrolytic processes by Angela Wai-Wai Lee Download PDF EPUB FB2

Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic known as high-modulus polyethylene, (HMPE), it has extremely long chains, with a molecular mass usually between and million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular.

EFFECTS OF GAMMA RADIATION STERILIZATION AND IN-VITRO AGING ON ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE R. Shastri, E.S. Grood, R.J. Roe, F.R. Noyes Biomechanics Laboratory, Sports Medicine Institute Department of Orthopaedic Surgery University of Cincinnti, Cincinnati, OH ABSTRACT The properties of polyethylene Cited by: 2.

UHMWPE Biomaterials Handbook, Third Edition, describes the science, development, properties, and application of ultra-high molecular weight polyethylene (UHMWPE) used in artificial is now the material of choice for joint replacements, and is increasingly being used in fibers for sutures.

UHMWPE Biomaterials Handbook describes the science, development, properties and application of of ultra-high molecular weight polyethylene (UHMWPE) used in artificial joints. This material is currently used in million patients around the world every year for use in the hip, knee, upper extremities, and spine.

Introduction. For over four decades, ultra high molecular weight polyethylene (UHMWPE) has been used as one-half of the metal- or ceramic-on-plastic bearing couple in total joint replacement (TJR) components due to its toughness, durability, and biological inertness ().Though there are metal-on-metal and ceramic-on-ceramic bearing couples, the majority of joint replacement Cited by: Ultra High Molecular Weight (UHMWPE) Polyethylene materials have unique properties like high impact resistance, durability, high thermal conductivity and low dielectric constant.

The Seeker makes an UHMWPE into a tape form, available as tape itself or as woven tape fabric. Request PDF | In- vitro evaluation of the bioactivity and the biocompatibility of a novel coated UHMWPE biomaterial for biomedical applications | Ultra.

The high molecular weight, between 2 and 6 million g/mol, results in a high resistance to mechanical stresses in comparison with other types of polyethylene (HDPE, LDPE, and others). Macro- and micropores as the defects of UHMWPE internal structure decrease its mechanical properties and increase failure rate by: 9.

Abstract: Ultra-high molecular weight polyethylene (UHMWPE) has been the most commonly used bearing material in total joint arthroplasty. Wear and oxidation fatigue resistance of UHMWPE are regarded as two important mechanical properties to extend the longevity of knee prostheses.

Though accelerated in vitro protocols have been developed toFile Size: KB. The wear properties of biomaterials have been demonstrated to have a high importance within orthopedic bearing surfaces. This study performed a comparison of the wear between the two main grades of Ultra High Molecular Weight Polyethylene types GUR and GUR articulating against Cobalt Chromium.

Such a high capacity wear comparison has not been Cited by: 6. Ultra-high molecular weight polyethylene degrades during storage in air following gamma sterilization, but the extent of in vivo degradation remains unclear.

Ultra-High Molecular Weight Polyethylene: Influence of the Chemical, Physical and Mechanical Properties on the Wear Behavior. A Review The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Bracco, Pierangiola, Anuj Bellare, Alessandro Bistolfi, and Saverio Affatato Cited by: Ultra-high molecular weight polyethylene (UHMWPE) has been proven to be a good counterpart material when articulating against cobalt-chromium-molybdenum (Co-Cr-Mo) femoral components in TKRs [2,3].It displays a very low friction coefficient and it is widely used in the orthopaedic field as a bearing surface in different artificial by: 4.

Partially degraded high-density polyethylene (HDPE) was collected from plastic waste dump yard for biodegradation using fungi. Of various fungi screened, strain MF12 was found efficient in degrading HDPE by weight loss and Fourier transform infrared (FT-IR) spectrophotometric analysis.

Strain MF12 was selected as efficient HDPE degraders for Cited by: Other articles where Ultrahigh molecular weight polyethylene is discussed: polyethylene: Ultrahigh-molecular-weight polyethylene: Linear polyethylene can be produced in ultrahigh-molecular-weight versions, with molecular weights of 3, to 6, atomic units, as opposed toatomic units for HDPE.

These polymers can be spun into fibres and then. March | Report Format: Electronic (PDF) The global ultra high molecular weight polyethylene market size is expected to reach USD billion byaccording to a new report by Grand View Research, Inc.

It is projected to register a CAGR of % during the forecast period. Increasing demand of UHMWPE in the sheet and rod forms to meet a wide. Abstract. An in vitro simulation of fatigue loading of ultra-high molecular weight polyethylene (UHMWPE) knee components was carried out on a knee simulator and on a rolling and sliding wear tester.

Tibial components for the knee simulator were gamma-sterilized, implantable components taken from manufacturing inventory. The rolling/sliding UHMWPE Cited by: The opaque white UHMW sheet has a standard tolerance and meets American Society for Testing and Materials ASTM D specifications.

UHMW (ultra high molecular weight) polyethylene is an impact- chemical- and moisture-resistant plastic that has excellent abrasion resistance and a low-friction surface/5(). A manufactured fiber made from ultra-high molecular weight polyethylene.

This remarkably durable material is one of the world’s strongest and lightest fibers. The material is pound for pound, ten times stronger than steel, more durable than polyester, and according to the manufacturers, has a specific strength that is 40% greater than aramid.

Since its introduction as a bearing component for Total Joint Replacements (TJR) by Dr. Charnley in the early ’s, Ultra-high molecular weight polyethylene (UHMWPE) has become the gold standard to fabricate one of the articulating surfaces of total hip, total knee and total shoulder prostheses.

More than a million TJR’s are performed every year and is a multi-billion dollar. UTEC has a molecular weight about 10 times higher than High Density Polyethylene (HDPE) resins. The ultra high molecular weight of UTEC results in excellent mechanical properties such as high abrasion resistance, impact strength and low coefficient of friction.

These special properties allow the product to be used in several high performance File Size: 2MB.Redco™ Ultra High Molecular Weight Polyethylene (UHMWPE) has extremely low moisture absorption, a very low coefficient of friction, is self lubricating and is highly resistant to abrasion (10 times more resistant to abrasion than carbon steel).

Redco™ UHMW has the highest impact strength of any thermoplastic presently made and is highly resistant to corrosive chemicals, [ ].Bottom Line: Ultra-high molecular weight polyethylene (UHMWPE) has been the most commonly used bearing material in total joint present study investigated the accelerated ageing of UHMWPE in hydrogen peroxide highly oxidative chemical sliced samples of UHMWPE were oxidized in a hydrogen peroxide solution for days with their .