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Monday, November 9, 2020 | History

2 edition of Tribological characteristics of a composite total-surface hip replacement found in the catalog.

Tribological characteristics of a composite total-surface hip replacement

William R. Jones

Tribological characteristics of a composite total-surface hip replacement

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  • 33 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch in Washington, D.C .
Written in English

    Subjects:
  • Artificial hip joints -- Materials

  • Edition Notes

    StatementWilliam R. Jones, Jr., Jack C. Roberts and Frederick F. Ling
    SeriesNASA technical paper -- 1853
    ContributionsRoberts, Jack C, Ling, Frederick F. 1927-, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Lewis Research Center, Rensselaer Polytechnic Institute
    The Physical Object
    Paginationii, 15 p. :
    Number of Pages15
    ID Numbers
    Open LibraryOL14932920M


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Tribological characteristics of a composite total-surface hip replacement by William R. Jones Download PDF EPUB FB2

Tribological characteristics of a composite total-surface hip replacement. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch, [] (OCoLC) Tribological characteristics of a composite total-surface.

Substantial improvements are found in the mechanical and tribological properties of the hybrid polymer matrix composite, which can be used for a variety of applications in human body bone replacement. In this case, their application in orthopaedics as an implantable material in bone surgery has been considered and by: 5.

To fulfil surgeons’ and patients’ increasingly exacting requirements, ceramists have also developed a new ceramic composite, the alumina matrix composite (AMC). This material combines the great principles of the reinforcement of ceramics with its tribological qualities Cited by: Tribological characteristics of a composite total-surface hip replacement Continuous fiber, woven E glass composite femoral shells having the same elastic properties as bone were fabricated.

The shells were then encrusted with filled epoxy wear resistant coatings and run dry against ultrahigh molecular weight polyethylene acetabular cups in 42, andcycle wear tests on a total hip. The Fabrication and Wear Test of a Continuous Fiber/Particulate Composite Total Surface Hip Replacement Other authors.

Tribological Characteristics of Composite Total Surface Hip Title: President, JC Roberts Consulting. Total hip replacement (THR), or total hip arthroplasty (THA), at least more than 20 years.

Nowadays, fabrication of composite materials is a possible way and promising technique for improving considerably various required properties such as wear, outstanding tribological characteristics such as low friction and high wear resistance; 6.

Tribological characteristics of a composite total-surface hip replacement. By J. Roberts, The tribological characteristics of these continuous fiber particulate composite femoral shells articulating with ultrahigh molecular weight polyethylene acetabular cups were comparable to those of a vitallium ball articulating with an ultrahigh.

Total hip replacement (THR) is extremely common. Some prostheses fail, particularly in younger patients, and need to be revised, most commonly for loosening secondary to wear or dislocation.

The paper presents a tribological characteristics of the kinematics couple: tooth - composite material for permanent dental fillings. Two original composites containing fluorine sources.

In order to develop a new material for femoral head of hip joint replacement, Al 2 O 3 /TiO 2 nanocomposite was realized with variation of TiO 2 from 0 to 25 mol%. Physical and mechanical properties were studied, as well as tribological characteristics. The following results were obtained.

The 14th International Conference on Wear of Materials took place in Washington, DC, USA, 30 March - 3 April These proceedings contain over two-hundred peer reviewed papers containing the best research, technical developments and engineering case studies from around the world.

Biomaterials and nano-tribology receive special attention in this collection reflecting the general trends in. The Hip Bearing as a Tribological System. In this section, we will apply the terms explained previously to the artificial hip joint. Because of the complex nature of tribology, wear at the hip cannot be reduced to a material property but is determined by the characteristics of the system.

In this case, their application in orthopaedics as an implantable material in bone surgery has been considered and studied. These composite materials have found extensive use in orthopaedic applications, particularly in bone fixation plates, hip joint replacement, bone.

In cases where good mechanical characteristics are required as in hip implants, knee implants, bone screws, and plates, Ti-6Al-4V alloy is being used.

One of the most common applications of titanium alloys is artificial hip joints that consist of an articulating bearing (femoral head and cup) and stem [ 24 ], where metallic cup and hip stem. Jack C. Roberts, Frederick F. Ling, William R. Jones, Fabrication and Wear Test of a Continuous Fiber/Particulate Composite Total Surface Hip Replacement, A S L E Transactions, /, 26, 3, (), ().

In this research, an analysis of polymer composite with the matrix of Lcured hardener H and six reinforcement layers of carbon fabric GG T was provided. It involved a comparison of the dynamical behavior responses for three cases of composite structures in the context of the presence of the mass share modifier.

The samples with the addition of a physical modifier with. Ceramic materials possessing the properties of high-strength and rigidity are widely used in industry.

The shell nacre has a layered structure containing both macroscopic and microscopic levels and is equipped with superior qualities regarding hardness and strength.

Therefore, the ceramic composites with a nacre-like layered structure have the potential to be utilized as sliding bearings. The importance of tribological principles in design and optimisation of artificial hip joints to reduce wear is demonstrated. Keywords Bearing materials-UHMWPE-metal.

metal-on-metal Ceramic-on-ceramic Contact mechanisms Friction Lubrication Surface Total hip replacement Tribology for total hip replacement Tribology Wear. The torsional friction characteristics and damage mechanism are discussed.

The results show that PEEK exhibited low friction coefficient under the different conditions. With increases in the torsional angle and normal load, three types of torque/angular displacement amplitude (T – θ) curves (i.e., linear, parallelogram, and elliptical.

Tmp - Free download as PDF File .pdf), Text File .txt) or read online for free. Rin-koh (輪講) has a meaning of “each person taking turns reading and explaining a book“.

The original term, rin-doku (輪読), which literally means “ reading in a circle “, originates from the activity Japanese engineers perform when first reading instruction manuals and technical reference books in.

In this study, tribological performances of dimpled surfaces, with and without DLC coating, have been investigated under both BS and OASF. The friction tests were performed utilizing a pin on a disk tribometer, whereas contact pressure, speed, and temperature were simulated to a 'medium walking gait' of hip joint conditions.

The most commonly used bearing couple in prosthetic hip or knee joint replacements consists of a cobalt–chrome (CoCr) metal alloy articulating against ultrahigh‐molecular‐weight polyethylene. Ceramics have been used as an alternative to metal‐on‐polyethylene in joint replacement surgery of arthritic hips and knees since the s.

The incidence of total hip arthroplasty is increasing in number because of successful outcomes. Although technically challenging, once mastered a hip replacement is one of the most gratifying surgeries for both patient and surgeon.

This book covers some of the most important aspects of hip replacement surgery. These include preoperative planning, anesthesia, classification systems, management.

HIP REPLACEMENT OVERVIEW. Nowadays, the world market has several hundred different brands of hip replacements, among which the surgeon will select one on the basis of patient symptoms and characteristics (e.g., gender, age) and her/his own clinical huge number of hip replacements can be classified according to their geometry (structure and dimensions) and.

The Direct Anterior Approach to Hip Reconstruction is a comprehensive reference text that addresses contemporary surgeon interest in innovation and less invasive surgery. This resource will help with introductory learning, intermediate technical development, and advanced revision total hip skills using the direct anterior s: 1.

Tribological testing of pre-assembled alumina matrix composite hip prostheses. In (), Biotribological and structural characteristics of 28 mm diameter ZTA-ZTA hip joints under standard and aggressive wear conditions using a ProSim hip materials and liner thickness on the wearof the porous coated anatomic total hip replacement.

Total hip replacement is an excellent pain relieving procedure, and most patients receive approximately 95% pain relief. Although complications are relatively rare (% of patients), patients may experience a complication in the postoperative period.

These include very serious and possibly life threatening complications such as heart attack. Scientists based in the UK claim to have 3D-printed the first synthetic tongue surface. Creating the biomimetic soft surface with tongue-like textures could pave the way for a range of new.

The resulting book includes all presentations delivered on the day and covers a range of interesting topics. Up-to-date information is provided on the various articulating materials, and all the articulations recently used in total hip arthroplasty are discussed, with provision of clinical data.

Hip replacement was once impossible because, although joints could easily be produced in a laboratory, the human body rejected the materials. Sometimes the pins that held the artificial joint to other bones worked loose and required further surgery.

Some joints, especially the artificial knee, didn’t work very well because they were designed. Abstract — In this research, a numerical method was developed for predicting the progressive failure of thick laminated composite femoral components.A three-dimensional (3-D) global/3-D local technique was developed to capture the overall structural response of this system, while also enabling the 3-D ply-level stress state to be determined efficiently and accurately.

Recently, “ tribocorrosion, ” a research area combining the science of tribology and corrosion, has drawn attention from scientists and engineers belonging to a wide spectrum of research domains.

This is due to its practical impact on daily life and also the accompanying economical burdens. It encompasses numerous applications including the offshore, space, and biomedical industry, for.

Galling is the surface phenomenon which involves adhesion of local contact points and creation of protrusions on the juxtaposition of surfaces owing to high friction, inappropriate tribological loading, starved lubrication and high contact pressure (~  kPa).

All these factors result in severe plastic deformation varying from to 10, µε (ε-strain) and diffusion of. Results of sliding wear tests on three alumina ceramics with different grain sizes are discussed in the light of crackresistance (R‐curve, or T‐curve) characteristics.

The degree of wear increases abruptly after a critical sliding period, reflecting a transition from deformation‐controlled to fracture‐controlled sulface. The acetabular cup placement should allow for normal hip motion to avoid impingement.

Placement depends on appropriate Version, Inclination, Depth, and Height. It is affected by Pelvic Tilt. The Al 2 O 3 and ZrO 2 like oxide have a lengthy history in the field of hip and knee joint replacement providing a tougher bearing surface with low wear rate.

With high fracture toughness and more resistant to crack propagation than alumina, Si 3 N 4 presents an alternative to oxide ceramic with comparable wear rate (Bal et al.

; Cappie. Total hip arthroplasty (THA) or total hip replacement (THR) is an orthopedic procedure that involves the surgical excision of the femoral head and cartilage of the acetabulum and replacement of the joint with articulating femoral and acetabular components. It is a commonly performed procedure usually with very good results and return to function.

(18) Rana, A. and Farhat, Z. () Preparation and Tribological Characterization of Graphene Incorporated Electroless Ni-P Composite Coatings, Surface and. The great majority of hip replacement implants are fixed bearing, meaning that there is a stem that inserts into the femur, a ball that replaces the head of the femur or top of the thigh bone, and a shell that is fixed and lines the hip socket (acetabulum).

One manufacturer though now makes a mobile-bearing hip implant as well.Hip replacement is a surgical procedure in which the hip joint is replaced by a prosthetic implant, that is, a hip replacement surgery can be performed as a total replacement or a hemi (half) replacement.

Such joint replacement orthopaedic surgery is generally conducted to relieve arthritis pain or in some hip fractures.A total hip replacement (total hip arthroplasty or THA.

Total Hip Arthroplasty 1. TOTAL HIP ARTHROPLASTY Many mountains climbed - many yet to conquer 2. HISTORICAL REVIEWThe present, like a note of music,is nothing but as it appertains towhat is past and what is to come Walter Landau 3. Hip arthroplasty interpositional excision replacement 4.