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• Journal article
  Apsingi S, Nguyen T, Bull AMJ, Unwin A, Deehan DJ, Amis AAet al., 2009,
  , KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol: 17, Pages: 305-312, ISSN: 0942-2056
  • Cite
  • Citations: 46
• Journal article
  Merican AM, Ghosh KM, Deehan DJ, Amis AAet al., 2009,
  , JOURNAL OF ORTHOPAEDIC RESEARCH, Vol: 27, Pages: 330-334, ISSN: 0736-0266
  • Cite
  • Citations: 28
• Journal article
  Merican AM, Kondo E, Amis AA, 2009,
  , JOURNAL OF BIOMECHANICS, Vol: 42, Pages: 291-296, ISSN: 0021-9290
  • Cite
  • Citations: 37
• Journal article
  Dickinson A, Browne M, Jeffers J, Taylor Aet al., 2009,

  Pre-clinical analysis of an acetabular cup with improved in vivo stability and integrity

  , Key Engineering Materials, Vol: 396-398, Pages: 31-34
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• Journal article
  Jeffers JRT, Roques A, Taylor A, Tuke MAet al., 2009,

  The problem with large diameter metal-on-metal acetabular cup inclination.

  , Bull NYU Hosp Jt Dis, Vol: 67, Pages: 189-192, ISSN: 1936-9719

  Large diameter metal-on-metal hip bearings have proven to be clinically successful in active patients, but, in a small number, they are associated with elevated wear and high metal ion levels when cup inclination angles are too steep and the version is too extreme, or either alone. Based on the geometry of six different commercially available large diameter metal-on-metal acetabular components, this study demonstrated that the critical bearing surface operates at an angle up to 16 masculine greater than the cup face inclination. Due to geometry alone, measured cup inclination is not the angle that most surgeons perceive it to be. We strongly recommend when employing large diameter metal-on-metal bearings that lower inclination and version angles are targeted to prevent excessive wear.

  • Abstract
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• Conference paper
  Chong DYR, Hansen UN, Amis AA, 2009,

  COMPUTATIONAL BIOMECHANICAL ANALYSIS OF FIXATION PERFORMANCE AND BONE RESORPTION OF TIBIAL PROSTHESIS IMPLANTATION

  , ASME Summer Bioengineering Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 975-976
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• Journal article
  Masouros SD, Parker KH, Hill AM, Amis AA, Bull AMJet al., 2009,

  Testing and modelling of soft connective tissues of joints: a review

  , Journal of Strain Analysis for Engineering Design, Vol: 44, Pages: 305-318

  There is wealth of data from experimental and numerical methods of analysing and modelling soft connective tissues of joints. In recent years, the advances in computational and technological capabilities allowed for several aspects of the function and mechanical behaviour of soft connective tissues of joints to be explored. However, the nature of soft tissue poses a great challenge in characterising its material behaviour in a repeatable and physiologically or clinically relevant manner. This review article attempts to present, critique and suggest experimental and numerical methods that are associated with the function and mechanical response of soft connective tissues of joints.

  • Abstract
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• Journal article
  Kessler O, Bull AMJ, Amis AA, 2009,
  , Journal of Biomechanics, Vol: 42, Pages: 665-670
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• Journal article
  Masouros SD, McDermott ID, Amis AA, AMJ Bet al., 2008,
  , KNEE SURG SPORT TR A, Vol: 16, Pages: 1121-1132, ISSN: 0942-2056

  The menisci of the knee act primarily to redistribute contact force across the tibio-femoral articulation. This meniscal function is achieved through a combination of the material, geometry and attachments of the menisci. The main ligaments that attach the menisci to the tibia (insertional ligaments, deep medial collateral ligament), the femur (meniscofemoral ligaments, deep medial collateral ligament) and each other (the anterior intermeniscal ligament) are the means by which the contact force between tibia and femur is distributed into hoop stresses in the menisci to reduce contact pressure at the joint. This means that the functional biomechanics of the menisci cannot be considered in isolation and should be considered as the functional biomechanics of the meniscus-meniscal ligament construct. This article presents the current knowledge on the anatomy and functional biomechanics of the meniscus and its associated ligaments. Much is known about the function of the meniscus-meniscal ligament construct; however, there still remain significant gaps in the literature in terms of the properties of the anterior intermeniscal ligament and its function, the properties of the insertional ligaments, and the most appropriate ways to reconstruct meniscal function surgically.

  • Abstract
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• Journal article
  Amadi HO, Gupte CM, Lie DTT, McDermott ID, Amis AA, Bull AMJet al., 2008,
  , Knee Surgery Sports Traumatology Arthroscopy, Vol: 16, Pages: 1004-1008, ISSN: 0942-2056

  The aim of this study was to test the hypothesis that the meniscofemoral ligaments (MFLs) of the human knee assist the lateral meniscal function in reducing tibiofemoral contact pressure. Five human cadaveric knee joints were loaded in axial compression in extension using a 4-degree of freedom rig in a universal materials testing machine. Contact pressures pre- and post-sectioning of the MFLs were measured using pressure sensitive film. Sectioning the MFLs increased the contact pressure significantly in the joints for two of the four measures. In addition to their known function in assisting the posterior cruciate ligament (PCL) to resist tibiofemoral posterior drawer, the MFLs also have a significant role in reducing contact stresses in the lateral compartment. Their retention in PCL and meniscal surgery is therefore to be advised.

  • Abstract
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• Journal article
  Smith CD, Masouros S, Hill AM, Wallace AL, Amis AA, Bull AMJet al., 2008,
  , CURRENT ORTHOPAEDICS, Vol: 22, Pages: 341-348, ISSN: 0268-0890
  • Cite
  • Citations: 7
• Journal article
  Bull AMJ, Kessler O, Alam M, Amis AAet al., 2008,
  , CLINICAL ORTHOPAEDICS AND RELATED RESEARCH, Vol: 466, Pages: 2491-2499, ISSN: 0009-921X
  • Cite
  • Citations: 97
• Journal article
  Zioupos P, Hansen U, Currey JD, 2008,

  Microcracking damage and the fracture process in relation to strain rate in human cortical bone tensile failure

  , J Biomechanics, 2008, 41(14):2932-9
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• Journal article
  Harry LE, Sandison A, Paleolog EM, Hansen U, Pearse MF, Nanchahal Jet al., 2008,
  , JOURNAL OF ORTHOPAEDIC RESEARCH, Vol: 26, Pages: 1238-1244, ISSN: 0736-0266
  • Cite
  • Citations: 122
• Journal article
  Hopkins AR, Hansen UN, Bull AM, Emery R, Amis AAet al., 2008,

  Fixation of the reversed shoulder prosthesis

  , J Shoulder and Elbow Surgery, 2008
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• Journal article
  Amadi HO, Hansen UN, Wallace AL, Bill AMet al., 2008,
  , JOURNAL OF BIOMECHANICS, Vol: 41, Pages: 2144-2149, ISSN: 0021-9290
  • Cite
  • Citations: 9
• Journal article
  Amadi HO, Sanghavi SM, Kamineni S, Skourat R, Hansen UN, Bull AMJet al., 2008,
  , Journal of Anatomy, Vol: 212, Pages: 863-867, ISSN: 0021-8782

  The aim of this work was quantitatively to establish the relationship between the plane that hosts the humeral head lateral margin (anatomical neck) and that of the capsular insertion. Eight cadaveric shoulders were used. These were dissected, exposing the humeral head margin and the root of the capsular humeral insertion to extract digitally their outlines using a mechanical 3‐d digitizer. The datasets of the digitized outlines were applied and the geometric planes they best fitted mathematically calculated. Vector analysis techniques were finally applied to the two planes to quantify the relationship between them. The humeral head margin is circular (± 2.2% of radius), having each of its outlining points on the same plane (within ± 1.5 mm.) The capsular attachment outlining points also insert on a plane (± 1.4 mm). The two planes are related to one another by an inclination of 14.5 ± 3.6°. The relationship described here would allow for in vivo prediction of humeral attachment of capsular structures by using radiological datasets of the anatomical neck. This would be useful in patient‐specific modelling to study and understand the glenohumeral ligament kinematics during clinical examinations and to plan surgical reconstructive procedures.

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• Journal article
  McDermott ID, Lie DTT, Edwards A, Bull AMJ, Amis AAet al., 2008,
  , KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol: 16, Pages: 553-560, ISSN: 0942-2056
  • Cite
  • Citations: 85
• Journal article
  McDermott ID, Masouros SD, Amis AA, 2008,
  , CURRENT ORTHOPAEDICS, Vol: 22, Pages: 193-201, ISSN: 0268-0890
  • Cite
  • Citations: 87
• Journal article
  Brassart N, Sanghavi S, Hansen UN, Emery RJ, Amis AAet al., 2008,
  , JOURNAL OF SHOULDER AND ELBOW SURGERY, Vol: 17, Pages: 784-789, ISSN: 1058-2746
  • Cite
  • Citations: 5

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