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Dissertations / Theses on the topic 'Joint replacements'

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1

Smythe, Emma Louise. "Microbial infection of total joint replacements." Thesis, University of Warwick, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247941.

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2

Abdelgaied, Abdellatif Abdelfadeel Younes. "Computational wear modelling of knee joint replacements." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582519.

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Due to the fact that a growing number of young patients require joint replacements, the expected lifetime of the prostheses is considerably increasing, and patient activities are becoming more demanding. New materials and designs are being introduced. The technical challenge lies in developing new designs, with high-performance materials, and low wear to improve prosthesis life. The main issue is to pre-clinically investigate the new materials and designs. Many researchers have reported wear in total knee replacements investigated in simulators. A single simulator test can be very expensive an
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3

Mahomed, Aziza. "Properties of elastomers for small-joint replacements." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/295/.

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Silicones are used to manufacture finger and wrist joints. However these joints have fractured prematurely in vivo. There is a lack of literature on the mechanical properties of silicones. The aim of this thesis was to investigate the viscoelastic and related properties of elastomers such as silicones and polyurethanes (suggested as a possible substitute for silicones in the implants) and to relate the properties to how an implant may perform in vivo. The viscoelastic properties of medical-grade silicones and Elast-Eon\(^{TM}\)3 were found to depend on frequency in compression. Above a certain
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4

Chen, Elvis Chai-Shin. "Three-dimensional joint kinematics of total knee replacements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0004/MQ42595.pdf.

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5

Orr, J. F. "Experimental measurement of stresses in bone and joint replacements." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373559.

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6

Giannetti, Francesco Antonio. "Finite Element modelling to predict wear in joint replacements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22927/.

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Wear is the main cause of failure of prosthetic implants, for this reason, it is important to invest in this research field and study possible causes of implant failure in order to prevent negative outcomes after joint arthroplasty and increase the lifespan of the artificial joint. The techniques commonly used to measure this phenomenon involve the use of hip simulators, which, however, are expensive and time-consuming and do not take into account the high variability between different patients. A valid alternative to experimental tests in the laboratory is the use of computational methods, al
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7

Yamac, Tuba. "The extraction and characterisation of wear particles from tissues around failed orthopaedic implants of different designs." Thesis, Queen Mary, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368159.

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8

Ma, Le. "Wear Behaviour of Biolox delta ceramic Composite for Joint Replacements." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522486.

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9

Ellison, Peter. "Investigation of wear within the patellofemoral joint of total knee replacements." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485177.

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Quantification of in vitro wear rates is· now considered an essential step in the development of a new joint replacement prior to clinical trial. However, little research exists around in vitro simulation of wear in the patellofemoral joint (pFJ) despite over 200,000 being implanted annua.lly within the Eur~pean Union. A method of simulating wear using four active degrees of freedom within the PFJ of a commercially available total knee replacement (TKR) has been developed.. As part of the development of the wear simula~ion methodology a computational model of the proposed simulator was crea
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10

Burgess, Ian C. "Tribological and mechanical properties of compliant bearings for total joint replacements." Thesis, Durham University, 1997. http://etheses.dur.ac.uk/4720/.

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The tribology of a wide range of designs of compliant layer acetabular cups has been evaluated using a simulator. The simulator applied a dynamic load of 2 kN and a sinusoidal motion of ±25 , and measured the frictional resistance directly. In general the friction developed in these joints was extremely low, with friction factors typically below 0.01. When the experimental results were compared with theoretical estimates of friction a poor correlation was found. Further analysis suggested that the design of compliant layer acetabular cups was insensitive to many of the parameters suggested by
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11

Allen, Matthew J. "Diamond-like carbon as a wear-retardant coating for arthroplasty components." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364325.

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12

Nečas, David. "The Effect of Synovial Fluid Constituents on Lubrication of Hip Joint Replacements." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-256575.

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Dizertační práce se zabývá mechanismy mazání v náhradách kyčelního kloubu. Byla provedena systematická studie formování proteinového filmu při zahrnutí různých materiálů a provozních podmínek. Hlavní pozornost je přitom věnována roli jednotlivých proteinů obsažených v synoviální kapalině při současné přítomnosti dalších proteinů. Jelikož metody aplikované v předchozích studiích neumožňovaly separovat jednotlivé složky maziva, byla vyvinuta optická měřící metoda na principu fluorescenční mikroskopie. Z důvodu verifikace metody byly provedeny dvě nezávislé studie zaměřené na měření tloušťky maza
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13

Liu, Yujing. "Finite element analysis of stress distribution within metal-on-metal joint replacements." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/471.

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Demand for joint replacements is rising in Australia, driven by a sharp increase in the number of joint problems associated with population aging and obesity. In artificial joints, delamination or failure within the coatings occurs when the stress reaches a critical level, resulting in large wear debris particles appearing on the contact surface between the head and the cup. The process has been described as due to a stress-corrosion-cracking mechanism. Under the same loading, stress increases when the contact area decreases, which happens in the vicinity of wear debris. As such, once wear deb
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14

Clark, Andrew Chapman. "Dynamic measurements of lubrication film thickness of UHMWPE contacts for total joint replacements." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181667482/.

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Thesis (Ph.D.) -- Clemson University, 2007.<br>Title from first page of PDF file. Document formatted into pages; contains xviii, 192 p. ; also includes graphics (chiefly col.). Contains additional supplemental files.
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15

Runser, Alicia M. "Global Joint Registry: Analysis of Revision Hip Arthroplasty Data." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1610382916575377.

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16

Bills, Paul J. "The development of a geometric methodology for the determination of volumetric wear in total joint replacements & development of a total knee replacement joint using new and novel measurement techniques." Thesis, University of Huddersfield, 2007. http://eprints.hud.ac.uk/id/eprint/2020/.

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Total joint replacement is one of the most common elective surgical procedures performed worldwide, with an estimate of 1.5 million operations performed annually. It has long been recognised that wear analysis of total joint replacements is an important means in determining failure mechanisms, functionality and improving longevity of these devices. The standardised method for assessing wear volumes in such joints is through gravimetric means and it has been shown that this method is a useful tool for indicating simulated wear volumes. This method is, however, of little value when considering t
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17

Baker, Paul Nicholas. "Analysis of knee replacements using data from the National Joint Registry for England and Wales." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2404.

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Introduction: Establishing best practice for knee replacement is important given the large number of procedures performed. Research into knee replacement is problematic given that implant failure is a rare event. The logistical and financial costs associated with prospective clinical trials are therefore high. Research using national arthroplasty registers may overcome some of these difficulties. Aim: To assess whether research performed on data recorded by the National Joint Registry for England and Wales has the ability to answer clinically relevant research questions relating to knee replac
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18

Olofsson, Johanna. "Friction and Wear Mechanisms of Ceramic Surfaces : With Applications to Micro Motors and Hip Joint Replacements." Doctoral thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-156801.

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Surfaces exposed to wear always transform and typically a layer of new structure and composition is formed. This layer, often called tribofilm, changes the friction and wear properties. Tribofilms formed on ceramic surfaces may consist of products from chemical reactions between the materials in contact and the environment or consist of compacted wear debris. In this thesis, focus has been to understand the friction and wear mechanisms of ceramic surfaces, as well as acquiring knowledge about the properties of the new surfaces created during wear. Ultimately, this understanding can be used to
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19

Murphy, Michelle Leonie. "Total Joint Replacements: Analysis of the Impact of Physiotherapy on Hospital Length of Stay and Models of Care." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/55081.

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Hospital length of stay (LOS) following total joint replacement surgery has reduced significantly with advancements in models of care. This natural cohort study examined why individual deviated from the clinical pathway and the risk of increased LOS using chronic conditions and the Risk Assessment and Prediction Tool (RAPT). Physiotherapy milestones, morbid obesity, wound issues and age were identified with increased LOS. The RAPT was found to be valid. Critical review of hospital processes is recommended.
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20

Varadarajan, Ravikumar. "On the Nature of Static and Cyclic Fracture Resistance of Ultra High Molecular Weight Polyethylenes Used in Total Joint Replacements." Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1164903681.

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21

Carlson, Kjirste Lynn. "Human hip joint mechanics : an investigation into the effects of femoral head endoprosthetic replacements using in vivo and in vitro pressure data." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/31043.

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22

Damm, Philipp [Verfasser], Georg [Akademischer Betreuer] Bergmann, and Marc [Akademischer Betreuer] Kraft. "Loading of total hip joint replacements : in vivo measurements with instrumented hip implants / Philipp Damm. Gutachter: Marc Kraft ; Georg Bergmann. Betreuer: Georg Bergmann." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1066163774/34.

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23

Damm, Philipp [Verfasser], Georg Akademischer Betreuer] Bergmann, and Marc [Akademischer Betreuer] [Kraft. "Loading of total hip joint replacements : in vivo measurements with instrumented hip implants / Philipp Damm. Gutachter: Marc Kraft ; Georg Bergmann. Betreuer: Georg Bergmann." Berlin : Technische Universität Berlin, 2014. http://nbn-resolving.de/urn:nbn:de:kobv:83-opus4-56941.

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24

O'Dwyer, Lancaster-Jones Oscar Gilbert. "The effect of variations in component positioning and swing phase load on the occurrence and severity of edge loading and wear in hip joint replacements." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/19659/.

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Edge loading is multifactorial and has been identified as a risk leading to the revision of hip joint replacements. Pre-clinical testing requirements currently do not incorporate edge loading. Previous testing of edge loading has been carried out as controlled dynamic microseparation of 0.5 mm via a spring, where the femoral head contacts the rim section of the acetabular cup. The input conditions of these tests did not allow the individual evaluation of other variables due to the constraints of the methodology. The aim of these studies was to evaluate the effect on the occurrence and severity
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25

Lam, Kwok-wai. "Design and development of a new prosthetic device for proximal interphalangeal joint replacement." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B3889161X.

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26

Walter, William Lindsay School of Biomechanics UNSW. "Severe biomechanical conditions in total hip replacement." Awarded by:University of New South Wales. School of Biomechanics, 2006. http://handle.unsw.edu.au/1959.4/25968.

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Hip simulators are designed to reproduce the forces and motion patterns of normal walking. In vivo demands on total hip replacements, however, are varied and often more severe than normal walking conditions. It is these severe conditions that often lead to implant failure. This is clinically based research aimed at understanding some of the more severe conditions in hips and the effect that these have on the performance of the total hip replacement. The polyethylene liner can act as a pump in an acetabular component, forcing fluid and wear particles through the holes to the retroacetabular bon
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27

Aka, Mian. "Joint inventory/replacement policies." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057092535.

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28

Lam, Kwok-wai, and 林國偉. "Design and development of a new prosthetic device for proximal interphalangeal joint replacement." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3889161X.

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29

Pylios, Theodoros. "A new metacarpophalangeal joint replacement arthroplasty." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1004/.

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The metacarpophalangeal joint is vital for hand function. It is frequently affected by rheumatoid arthritis or osteoarthritis and in some cases the diseased joint is replaced with an implant. The past and current metacarpophalangeal joint replacements can be divided into three main categories: hinge implants, flexible implants and surface replacement implants. There is some frustration among hand surgeons as these implants fail in vivo in comparison with the replacement of larger joints such as the hip or knee. The aim of this study was a new design concept for the replacement of the diseased
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30

Good, Victoria Diane. "The tribological significance of the joint fluid analog in a hip joint simulator." Thesis, University of Strathclyde, 2001. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21422.

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Wear is the number one concern with regards to the longevity of THR (total hip replacement). Therefore, reliable in-vitro prediction of wear is necessary. Thus, the laboratory should first validate their hip simulators with known clinical materials. The limiting factor in hip wear simulation has been the joint fluid analog. Using 100% bovine serum as the joint fluid analog, UHMWPE (ultra-high molecular weight polyethylene) wear-rates have been continually underestimated and PTFE (polytetrafluoroethylene) wear has been overestimated. Therefore, this work investigated the effect of protein conce
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31

Criswell, Amy Jo. "Development of a lumbar facet joint replacement." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2466.

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A majority of the American population will experience low-back pain during their lifetime. With this debilitating condition affecting more people every day, a solution is required to help the population. One of the causes of low-back pain is facet degeneration. Currently, there are no replacement devices on the market that solves this issue. This thesis presents a design of a facet joint replacement to reduce low-back pain due to facet degeneration. A finite element model of the lumbar spine (L3-L5) was developed to evalua
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32

Ma, Helen. "Quality of life changes after knee-joint replacement." Click to view the E-thesis via HKUTO, 2002. http://sunzi.lib.hku.hk/hkuto/record/B31971192.

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33

馬海倫 and Helen Ma. "Quality of life changes after knee-joint replacement." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31971192.

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34

Gul, Rizwan Mahmood 1967. "Improved UHMWPE for use in total joint replacement." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10226.

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35

Watters, Eamon Patrick John. "Wear properties of artificial hip joint materials." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321968.

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36

Ollivere, Benjamin. "Osteolysis in total joint replacement : are patient factors important?" Thesis, University of East Anglia, 2010. https://ueaeprints.uea.ac.uk/36323/.

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37

Auger, Daniel D. "Tribology of 'cushion bearings' used for total joint replacement." Thesis, University of Leeds, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417538.

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38

Foley, Elizabeth Louise. "Tibial rotation in patients after total knee joint replacement." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248949.

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39

Sopher, Ran Salach. "Muscle architecture, loading and joint replacement of the ankle." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/48939.

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The use of total ankle replacement (TAR) for treatment of arthritis is rapidly increasing, but survival rates are of major concern. The primary indication for TAR revision is implant loosening, which is linked with inadequate primary stability manifested in higher levels of initial implant-bone micromotion. Finite-element (FE) modelling has been utilised to assess micromotion of arthroplasty implants, but not TAR. Additionally, the biomechanical consequences of TAR malpositioning during surgery – previously linked with higher failure rates – remain unexplored. The aim of this thesis was theref
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40

Mortuza, Forida Yeasmin. "Role of cytokines in loosening joint prosthesis." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245583.

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41

Apatsidis, Dimitrios P. "The hip joint capsule : mechanical properties and contribution to joint stability in total hip replacement." Thesis, University of Strathclyde, 2002. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21186.

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The hip joint capsule is a complex soft tissue structure that comprises a number of ligaments with different thickness and strength respectively, as well as a thinner membrane-like part that provides the structural integrity for the capsule. The role of the capsule is twofold, forming a closed environment around the joint surfaces, in which the synovial fluids are retained, but also providing a passive joint resistance that acts in addition to the surrounding muscles and mainly in extreme limb positions and in unexpected limb loading. Despite its important role, the capsule is commonly removed
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42

Mazzucco, Daniel Clarke 1976. "Variation in joint fluid composition and its effect on the tribology of replacement joint articulation." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/33733.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2003.<br>Page 286 blank.<br>Includes bibliographical references.<br>Polyethylene wear is a significant clinical problem limiting the long-term survival of joint replacement prostheses, particularly in total hip arthroplasty (THA) and total knee arthroplasty (TKA). Although the tribology of joint replacement has consequently become an area of significant research, the effect of joint fluid on lubrication in the replaced joint has been largely overlooked. Several factors that affect the tribology of metal on polyethylene ar
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43

Thomas, Rhidian de Winton Melbourne. "Prosthetic replacement of the anterior cruciate ligament of the human knee." Thesis, Queen Mary, University of London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286739.

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44

Harper, Elizabeth Jane. "Development and characterisation of a hydroxyxapatite reinforced poly(ethylmethacrylate) bone cement." Thesis, Queen Mary, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339214.

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45

Stokoe, Susan Marie. "A finger function simulator and surface replacement prosthesis for the metacarpophalangeal joint." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6216/.

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Joint replacement surgery in the treatment of arthritic disease is now commonplace and on the whole very successful. Research into the design and development of prostheses has made major advances since the 1940s resulting in complex devices for almost all articulating joints of the body. In this thesis, a programme of work to design and test a surface replacement prosthesis for the metacarpophalangeal joint is presented. The anatomy and kinematics of the MCP joint are discussed for both normal and abnormal joint function and, based on these considerations, the design of a new surface replaceme
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46

Langlotz, Ulrich. "Computer assisted reconstruction and replacement of the human hip joint /." Bern, 2002. http://www.stub.unibe.ch/html/haupt/datenbanken/diss/bestell.html.

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47

Harun, Muhamad Noor. "Computational wear simulation for metal-on-metal hip joint replacement." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444062.

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48

Fisher, Emily Kay. "SYSTEMATIC REVIEW OF OUTCOMES OF TOTAL JOINT REPLACEMENT CLASS PARTICIPATION." Kent State University Honors College / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1367924351.

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49

Starke, Gregory Richard. "Numerical simulation of implant-bone interaction following cementless joint replacement." Doctoral thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/9258.

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Bibliography: leaves 143-154.<br>The advent of cemented joint replacements has revolutionised the management of patients suffering from chronic arthritis. However, establishing a durable bond between the prosthesis and the surrounding bone remains a considerable problem. As a result, cementless implants have been developed. These components rely on the ingrowth of bone into a porous coating, which covers a portion of the component surface, to achieve the required mechanical interlock. Once mineralised bone tissue has formed within .the porous surface, a stable bond results which will be mainta
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50

Washington, Angela. "Management of Postoperative Pain in the Total Joint Replacement Patient." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5594.

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Managing postoperative pain continues to be a challenging public health problem. The organization under study was experiencing a prolonged length of hospital stay (LOS) in the post-total knee and hip replacement surgery population that was causing system-wide patient flow issues. The purpose of this quality improvement project was to educate patients through an established education class on pain expectations, strategies on managing pain, discharge planning, and physical therapy expectations with a goal of reducing pain and LOS. The health belief model was used as a guide to incorporate new co
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