A A Amis

Summary

Affiliation: Imperial College
Country: UK

Publications

  1. doi request reprint The effect of femoral tunnel position and graft tension on patellar contact mechanics and kinematics after medial patellofemoral ligament reconstruction
    Joanna M Stephen
    Andrew A Amis, DSc Eng Mechanical Engineering Department, Imperial College London, London SW7 2AZ, UK
    Am J Sports Med 42:364-72. 2014
  2. pmc A quantitative technique to create a femoral tunnel at the averaged center of the anteromedial bundle attachment in anatomic double-bundle anterior cruciate ligament reconstruction
    Shuken Kai
    The Department of Sports Medicine and Joint Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
    BMC Musculoskelet Disord 14:189. 2013
  3. doi request reprint A clinical device for measuring internal-external rotational laxity of the knee
    Mahbub Alam
    Department of Mechanical Engineering, Imperial College London, United Kingdom
    Am J Sports Med 41:87-94. 2013
  4. doi request reprint Biomechanics of high tibial osteotomy
    Andrew A Amis
    Mechanical Engineering Department, Imperial College London, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 21:197-205. 2013
  5. doi request reprint The medial patellofemoral ligament: location of femoral attachment and length change patterns resulting from anatomic and nonanatomic attachments
    Joanna M Stephen
    Mechanical Engineering Department, Imperial College London, London, United Kingdom
    Am J Sports Med 40:1871-9. 2012
  6. pmc Validation of an ear-worn sensor for gait monitoring using a force-plate instrumented treadmill
    Louis Atallah
    The Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation, Imperial College London SW7 2BZ, UK
    Gait Posture 35:674-6. 2012
  7. doi request reprint The functions of the fibre bundles of the anterior cruciate ligament in anterior drawer, rotational laxity and the pivot shift
    Andrew A Amis
    Department of Mechanical Engineering, and Musculoskeletal Surgery Group, Imperial College London, London SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 20:613-20. 2012
  8. pmc The structural properties of the lateral retinaculum and capsular complex of the knee
    Azhar M Merican
    Musculoskeletal Surgery Department, Imperial College London, Charing Cross Hospital, London, UK
    J Biomech 42:2323-9. 2009
  9. ncbi request reprint Patellofemoral kinematics during knee flexion-extension: an in vitro study
    Andrew A Amis
    Department of Mechanical Engineering, Imperial College London, London, United Kingdom
    J Orthop Res 24:2201-11. 2006
  10. ncbi request reprint Current concepts on anatomy and biomechanics of patellar stability
    Andrew A Amis
    Department of Mechanical Engineering and Musculoskeletal Surgery Group, Department of Biosurgery and Surgical Technology, Imperial College London
    Sports Med Arthrosc 15:48-56. 2007

Collaborators

Detail Information

Publications89

  1. doi request reprint The effect of femoral tunnel position and graft tension on patellar contact mechanics and kinematics after medial patellofemoral ligament reconstruction
    Joanna M Stephen
    Andrew A Amis, DSc Eng Mechanical Engineering Department, Imperial College London, London SW7 2AZ, UK
    Am J Sports Med 42:364-72. 2014
    ....
  2. pmc A quantitative technique to create a femoral tunnel at the averaged center of the anteromedial bundle attachment in anatomic double-bundle anterior cruciate ligament reconstruction
    Shuken Kai
    The Department of Sports Medicine and Joint Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
    BMC Musculoskelet Disord 14:189. 2013
    ..Concerning anteromedial (AM) bundle reconstruction, however, no quantitative clinically available methods to insert a guide wire at the center of the direct attachment of the AM mid-substance fibers have been reported to date...
  3. doi request reprint A clinical device for measuring internal-external rotational laxity of the knee
    Mahbub Alam
    Department of Mechanical Engineering, Imperial College London, United Kingdom
    Am J Sports Med 41:87-94. 2013
    ..The dial test can be improved by providing reproducible, accurate measurements to improve diagnosis and treatment comparisons...
  4. doi request reprint Biomechanics of high tibial osteotomy
    Andrew A Amis
    Mechanical Engineering Department, Imperial College London, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 21:197-205. 2013
    ..This paper is a review of the biomechanical principles that support limb realignment surgery via osteotomy around the knee, principally high (proximal) tibial osteotomy...
  5. doi request reprint The medial patellofemoral ligament: location of femoral attachment and length change patterns resulting from anatomic and nonanatomic attachments
    Joanna M Stephen
    Mechanical Engineering Department, Imperial College London, London, United Kingdom
    Am J Sports Med 40:1871-9. 2012
    ..However, the natural behavior of the ligament is still not fully understood, and crucially, the correct landmark for femoral attachment of the MPFL at surgery is poorly defined...
  6. pmc Validation of an ear-worn sensor for gait monitoring using a force-plate instrumented treadmill
    Louis Atallah
    The Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation, Imperial College London SW7 2BZ, UK
    Gait Posture 35:674-6. 2012
    ..35, p = 0, Impulse: 0.26, p=0). Zero crossing features on the ML axis provided an accurate prediction of the gait-cycle, with a mean difference of 0.03s (-0.01, 0.05 confidence intervals)...
  7. doi request reprint The functions of the fibre bundles of the anterior cruciate ligament in anterior drawer, rotational laxity and the pivot shift
    Andrew A Amis
    Department of Mechanical Engineering, and Musculoskeletal Surgery Group, Imperial College London, London SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 20:613-20. 2012
    ..There is a clear need for further study of dynamic knee instability, to gain better understanding of how best to reconstruct the ACL and associated tissues...
  8. pmc The structural properties of the lateral retinaculum and capsular complex of the knee
    Azhar M Merican
    Musculoskeletal Surgery Department, Imperial College London, Charing Cross Hospital, London, UK
    J Biomech 42:2323-9. 2009
    ..These structural properties suggest that most of the load in-vivo is transmitted to the patella by the transverse fibres that originate from the ITB...
  9. ncbi request reprint Patellofemoral kinematics during knee flexion-extension: an in vitro study
    Andrew A Amis
    Department of Mechanical Engineering, Imperial College London, London, United Kingdom
    J Orthop Res 24:2201-11. 2006
    ..These data may be used in future studies of the effects of pathologies on patellar tracking...
  10. ncbi request reprint Current concepts on anatomy and biomechanics of patellar stability
    Andrew A Amis
    Department of Mechanical Engineering and Musculoskeletal Surgery Group, Department of Biosurgery and Surgical Technology, Imperial College London
    Sports Med Arthrosc 15:48-56. 2007
    ..Finally, these local factors are discussed in relation to overall limb alignment, which leads to the mechanical logic of more extensive surgical procedures such as femoral rotational osteotomy or tibial tuberosity medialization...
  11. doi request reprint The effect of trochleoplasty on patellar stability and kinematics: a biomechanical study in vitro
    A A Amis
    Department of Mechanical Engineering, Imperial College London, London, England
    J Bone Joint Surg Br 90:864-9. 2008
    ..001). This study has provided objective biomechanical data to support the use of trochleoplasty in the treatment of patellar instability associated with femoral trochlear dysplasia...
  12. ncbi request reprint Anatomy of the posterior cruciate ligament and the meniscofemoral ligaments
    A A Amis
    Biomechanics Section, Department of Mechanical Engineering, Imperial College London, Room 638 Mechanical Engineering Building, UK
    Knee Surg Sports Traumatol Arthrosc 14:257-63. 2006
    ..They both attach distally to the posterior horn of the lateral meniscus. Their slanting orientation allows the MFLs to resist tibial posterior drawer...
  13. doi request reprint Measurement of rotational laxity of the knee: in vitro comparison of accuracy between the tibia, overlying skin, and foot
    Mahbub Alam
    Department of Orthopaedic Surgery, Colchester Hospital University National Health Service Foundation Trust, Colchester, United Kingdom
    Am J Sports Med 39:2575-81. 2011
    ..Posterolateral corner (PLC) injuries are difficult to diagnose and cause significant morbidity. The ideal method for the dial test and its accuracy remain unclear...
  14. ncbi request reprint A comparative study of 'isometric' points for anterior cruciate ligament graft attachment
    T D Zavras
    Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London, UK
    Knee Surg Sports Traumatol Arthrosc 9:28-33. 2001
    ..This study confirms the existence of an isometric zone close to the posterior end of Blumensaat's line under several loading conditions. Other graft attachment points are less suitable for ACL reconstruction...
  15. ncbi request reprint Tensile strength of the medial patellofemoral ligament before and after repair or reconstruction
    J Mountney
    North Hampshire Hospital, Basingstoke, England, UK
    J Bone Joint Surg Br 87:36-40. 2005
    ..The last was not significantly weaker than the MPFL itself...
  16. ncbi request reprint Biomechanics of the PCL and related structures: posterolateral, posteromedial and meniscofemoral ligaments
    A A Amis
    Biomechanics Section, Mechanical Engineering Department, Imperial College, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 11:271-81. 2003
    ..are responsible for posterior knee stability near extension, and this, along with the action of the meniscofemoral ligaments, may explain why an isolated rupture of the posterior cruciate ligament does not often lead to knee instability..
  17. ncbi request reprint Intraoperative measurement of knee kinematics in reconstruction of the anterior cruciate ligament
    A M J Bull
    Department of Bioengineering, Imperial College of Science, Technology and Medicine, London, England, UK
    J Bone Joint Surg Br 84:1075-81. 2002
    ..This abnormal movement was abolished after reconstruction of the ACL...
  18. ncbi request reprint Anatomic and biomechanical study of the lateral collateral and popliteofibular ligaments
    T Sugita
    Mechanical Engineering Department, Imperial College, London, England
    Am J Sports Med 29:466-72. 2001
    ..The anatomic variation causes some knees to have better ligament orientations to withstand posterolateral tibial displacements and, conversely, other knees may be inherently more difficult to stabilize by reconstruction...
  19. ncbi request reprint The effects of articular, retinacular, or muscular deficiencies on patellofemoral joint stability: a biomechanical study in vitro
    W Senavongse
    Biomechanics Section, Mechanical Engineering Department, Room 638 Mechanical Engineering Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
    J Bone Joint Surg Br 87:577-82. 2005
    ..There was no effect on medial stability. There is a complex interaction between these structures, with their contributions to loss of lateral patellar stability varying with knee flexion...
  20. ncbi request reprint A technique for the measurement of patellar tracking during weight-bearing activities using ultrasound
    Yi Fen Shih
    Department of Mechanical Engineering, Imperial College London, London, UK
    Proc Inst Mech Eng H 217:449-57. 2003
    ..4 +/- 3.2 mm. Although further research is needed to improve the accuracy and reliability of this method, it has demonstrated the feasibility of obtaining patellar tracking data during load-bearing activities...
  21. ncbi request reprint Anatomy and biomechanics of the medial patellofemoral ligament
    A A Amis
    Mechanical Engineering Department, Biomechanics Section, Exhibition Road, London, SW7 2BX, UK
    Knee 10:215-20. 2003
    ..The contribution of the MPFL to resisting patellar lateral subluxation was greatest in the extended knee. This finding was linked to the retinaculae being tightest in full knee extension, and slackening with flexion...
  22. ncbi request reprint Bone adaptation to a polyester fiber anterior cruciate ligament replacement
    A A Amis
    Mechanical Engineering Department, Imperial College, London, England
    J Long Term Eff Med Implants 9:153-68. 1999
    ..There was no evidence of bone ingrowth in the human implants. It was hypothesized that-tunnel enlargement resulted from fretting at the implant-tissue interface in response to cyclic loads in use...
  23. ncbi request reprint Measurement of laxity in the anterior cruciate ligament-deficient knee: a comparison of three different methods in vitro
    R T Khan
    Musculoskeletal Surgery, Imperial College London, London, UK
    Proc Inst Mech Eng H 221:653-63. 2007
    ..These findings may be helpful in the future comparison of different studies...
  24. doi request reprint A biomechanical basis for tears of the human acetabular labrum
    C D Smith
    Department of Bioengineering, Imperial College London, Royal School of Mines, South Kensington Campus, London, UK
    Br J Sports Med 43:574-8. 2009
    ..A further cause could be reduced biomechanical properties in the area most susceptible to tears. However, no work has defined these properties...
  25. ncbi request reprint An anatomical study of meniscal allograft sizing
    I D McDermott
    Department of Biomechanics, Imperial College of Science, Technology and Medicine, Exhibition Road, London, UK
    Knee Surg Sports Traumatol Arthrosc 12:130-5. 2004
    ..However, potential size mismatches should be carefully borne in mind by surgeons using meniscal allografts...
  26. ncbi request reprint The effect of screw length and position on fixation of four-stranded hamstring grafts for anterior cruciate ligament reconstruction
    A R Harvey
    Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London SW7 2BX, UK
    Knee 10:97-102. 2003
    ..Cyclical load testing reflects the repetitive forces imposed in the early post-operative period following hamstring anterior cruciate ligament reconstruction and is important for the evaluation of graft fixations...
  27. ncbi request reprint Comparative anatomy of the meniscofemoral ligament in humans and some domestic mammals
    C M Gupte
    Biomechanics Section, Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ
    Anat Histol Embryol 36:47-52. 2007
    ..It is known to resist caudal translation of the tibia in conjunction with the lateral meniscus. This must be borne in mind when considering its function in the human knee...
  28. doi request reprint Biomechanics of the meniscus-meniscal ligament construct of the knee
    S D Masouros
    Department of Bioengineering, Imperial College London, Room 431 RSM Building, South Kensington Campus, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 16:1121-32. 2008
    ....
  29. ncbi request reprint Coracoacromial ligament tension in vivo
    A F W Chambler
    Department of Orthopaedics, St Mary s Hospital, London, UK
    J Shoulder Elbow Surg 12:365-7. 2003
    ..9 N; range, 3.7-22 N) and highest in abduction (mean, 15.7 N; range, 6.5-38 N). This study confirms CA ligament tension in vivo as a possible stimulus for acromial spur formation...
  30. ncbi request reprint Quantitative measurement of patellofemoral joint stability: force-displacement behavior of the human patella in vitro
    W Senavongse
    Biomechanics Section, Mechanical Engineering Department, Imperial College, Exhibition Road, London, SW7 2AZ, UK
    J Orthop Res 21:780-6. 2003
    ..Our finding that lateral patellar displacement occurred at the lowest restraining force when the knee was flexed 20 degrees agrees with clinical experience of patellar instability...
  31. ncbi request reprint A new type of flexor tendon repair. Biomechanical evaluation by cyclic loading, ultimate strength and assessment of pulley friction in vitro
    R J Williams
    Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, London, UK
    J Hand Surg Br 20:578-83. 1995
    ..We concluded that the DBPS plus Kessler-type core stitch will survive active mobilization better than the Kleinert method...
  32. ncbi request reprint Failure mechanisms of polyester fiber anterior cruciate ligament implants: A human retrieval and laboratory study
    A A Amis
    Biomechanics Section, Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London SW7 2BX, England
    J Biomed Mater Res 48:534-9. 1999
    ..Cadaver joints were run in a knee simulator, with deliberately impinging ACL implants. SEM examination of implants abraded in the knee in vitro showed identical fiber damage patterns, thus confirming the impingement hypothesis...
  33. doi request reprint Measurement of migration of soft tissue by modified Roentgen stereophotogrammetric analysis (RSA): validation of a new technique to monitor rotator cuff tears
    P M M Cashman
    Department of Bioengineering, Imperial College London, London, UK
    J Med Eng Technol 34:159-65. 2010
    ..This novel application of RSA to measure soft tissue migration is practicable and can be extended to in vivo studies...
  34. ncbi request reprint The anatomy of the patellar tendon
    O Basso
    Orthopaedic Biomechanics, Department of Mechanical Engineering, Imperial College, London, UK
    Knee Surg Sports Traumatol Arthrosc 9:2-5. 2001
    ..When harvesting B-PT-B, the oblique orientation of the fibres in the coronal plane must be borne in mind...
  35. pmc Tensile properties of the human glenoid labrum
    C D Smith
    Department of Bioengineering, and Department of Mechanical Engineering, Imperial College London, UK
    J Anat 212:49-54. 2008
    ..The glenoid labrum has similar tensile material properties to articular cartilage. Its elastic modulus varies around its circumference. This suggests that the labrum may encounter different forces at different positions...
  36. ncbi request reprint The posteromedial corner revisited. An anatomical description of the passive restraining structures of the medial aspect of the human knee
    J R Robinson
    Imperial College, London, England
    J Bone Joint Surg Br 86:674-81. 2004
    ..The information would serve as the basis for future biomechanical studies to investigate the contribution of the posteromedial structures to joint stability...
  37. ncbi request reprint A biomechanical study of four different meniscal repair systems, comparing pull-out strengths and gapping under cyclic loading
    I D McDermott
    Department of Biomechanics, Imperial College of Science, Technology and Medicine, London, UK
    Knee Surg Sports Traumatol Arthrosc 11:23-9. 2003
    ..These results confirm that meniscal repair by suturing gives the highest load to failure, but show that Arrows give superior hold under lower loads, with the least gapping across repairs under cyclic loading of the four methods tested...
  38. doi request reprint The anterolateral ligament: Anatomy, length changes and association with the Segond fracture
    A L Dodds
    Imperial College London, Biomechanics Group, Mechanical Engineering Department, London SW7 2AZ, UK
    Bone Joint J 96:325-31. 2014
    ....
  39. ncbi request reprint The palmar locking compression plate is biomechanically comparable to the dorsal pi plate for dorsally comminuted, intraarticular wrist fractures
    A J Hart
    Department of Trauma and Orthopaedic Surgery, Charing Cross Hospital, London, UK
    J Hand Surg Eur Vol 32:388-93. 2007
    ..036). However, the absolute difference was only 0.5 mm. Such a small difference is unlikely to be clinically detectable and, therefore, we conclude that there is no clinically significant difference between the two types of fixation...
  40. ncbi request reprint Accuracy of an electromagnetic measurement device and application to the measurement and description of knee joint motion
    A M Bull
    Biomechanics Section, Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London
    Proc Inst Mech Eng H 212:347-55. 1998
    ..The device is a useful tool for measuring joint motion in the operating theatre and laboratory, owing to its accuracy and insensitivity to surgical alloys...
  41. ncbi request reprint Mechanical factors in the initiation and propagation of tears of the rotator cuff. Quantification of strains of the supraspinatus tendon in vitro
    P Reilly
    Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, London, England, UK
    J Bone Joint Surg Br 85:594-9. 2003
    ..Differential strain causes shearing between the layers of the supraspinatus tendon, which may contribute to the propagation of intratendinous defects that are initiated by high joint side strains...
  42. ncbi request reprint Meniscofemoral ligaments revisited. Anatomical study, age correlation and clinical implications
    C M Gupte
    Department of Mechanical Engineering, Imperial College, University of London, England, UK
    J Bone Joint Surg Br 84:846-51. 2002
    ..The increased incidence of MFLs in younger donors suggests that they degenerate with age...
  43. ncbi request reprint Knee joint motion: description and measurement
    A M Bull
    Biomechanics Section, Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London
    Proc Inst Mech Eng H 212:357-72. 1998
    ..This is necessary for clinical application and to facilitate communication between the clinician and the engineer...
  44. ncbi request reprint Rapid prototyping for orthopaedic surgery
    P Potamianos
    Biomechanics Section, Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, London
    Proc Inst Mech Eng H 212:383-93. 1998
    ..The model provided a definitive interpretation of joint pathology and enabled a full assessment of the degree of injury...
  45. pmc Periprosthetic bone mineral density changes with femoral components of differing design philosophy
    C E Gibbons
    Chelsea and Westminster Hospital, London, UK
    Int Orthop 25:89-92. 2001
    ..05) and 7 (P<0.01). Although numerous factors affect BMD changes around cementless implants, this study suggests that less bone loss can be associated with the titanium CLS stem...
  46. ncbi request reprint No difference in patellar tracking between symmetrical and asymmetrical femoral component designs in TKA
    J E Stoddard
    Biomechanics Group, Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 22:534-42. 2014
    ..This study in vitro tested the hypothesis that a modern asymmetrical prosthesis would restore patellar tracking and stability to more natural behaviour than an older symmetrical prosthesis...
  47. doi request reprint Biomechanical comparisons between 4-strand and modified Larson 2-strand procedures for reconstruction of the posterolateral corner of the knee
    Shin Miyatake
    Department of Mechanical Engineering, Imperial College London, London, United Kingdom
    Am J Sports Med 39:1462-9. 2011
    ..It is important that reconstructions of posterolateral knee injuries restore joint laxity and patient function, but residual laxities are often observed...
  48. doi request reprint Biomechanical comparison of anatomic double-bundle, anatomic single-bundle, and nonanatomic single-bundle anterior cruciate ligament reconstructions
    Eiji Kondo
    Department of Mechanical Engineering, Imperial College London, London, United Kingdom
    Am J Sports Med 39:279-88. 2011
    ..Although both anatomic double-bundle and single-bundle anterior cruciate ligament reconstruction procedures are in use, it remains controversial whether the anatomic double-bundle procedure is biomechanically superior...
  49. doi request reprint Control of laxity in knees with combined posterior cruciate ligament and posterolateral corner deficiency: comparison of single-bundle versus double-bundle posterior cruciate ligament reconstruction combined with modified Larson posterolateral corner reco
    Sunil Apsingi
    Freeman Hospital, Newcastle, United Kingdom
    Am J Sports Med 36:487-94. 2008
    ..Although many posterior cruciate ligament (PCL) injuries are in combination with posterolateral corner (PLC) injuries, there has been little research on combined injury reconstruction; the literature includes differing recommendations...
  50. doi request reprint The effects of lateral meniscal allograft transplantation techniques on tibio-femoral contact pressures
    Ian D McDermott
    Mechanical Engineering Department, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 16:553-60. 2008
    ..This study suggests that meniscal allografting should have a chondroprotective effect and that there is a small advantage from adding bony fixation to suture fixation...
  51. ncbi request reprint A biomechanical comparison of single and double-row fixation in arthroscopic rotator cuff repair
    Christopher D Smith
    The Shoulder Unit, Hospital of St John and St Elizabeth, 60 Grove End Road, London NWB 9NH, United Kingdom
    J Bone Joint Surg Am 88:2425-31. 2006
    ..The specific aims were to measure gap formation at the bone-tendon interface under static creep loading and the ultimate strength and mode of failure of both methods of repair under cyclic loading...
  52. ncbi request reprint Arthroscopically insertable force probes in the rotator cuff in vivo
    Peter Reilly
    Department of Orthopaedic Surgery, Imperial College of Science Technology, St Mary s Hospital, London, England
    Arthroscopy 19:E8. 2003
    ..The AIFPs were removed through a port site by traction on a 0 (3.5 metric) nylon suture without complications...
  53. pmc Changes in knee kinematics reflect the articular geometry after arthroplasty
    Anthony M J Bull
    Department of Bioengineering, Imperial College London, London, UK
    Clin Orthop Relat Res 466:2491-9. 2008
    ..Thus, the data confirmed our hypothesis for rotations but not for translations. It is not known whether the standard navigated position provides the best match to physiologic kinematics...
  54. ncbi request reprint The attachments of the anteromedial and posterolateral fibre bundles of the anterior cruciate ligament. Part 2: femoral attachment
    Andrew Edwards
    Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 16:29-36. 2008
    ..0% (40-70) in a high-low direction. The attachment was oriented at 37 degrees to the femoral long axis. The results from this study could be used to guide ACL reconstruction techniques...
  55. ncbi request reprint A review of the function and biomechanics of the meniscofemoral ligaments
    Chinmay M Gupte
    Department of Mechanical Engineering, Imperial College, London, England
    Arthroscopy 19:161-71. 2003
    ..The goal of this study was to review current knowledge on the anatomy, biomechanics, and functions of the meniscofemoral ligaments. Type of Study: Literature review...
  56. ncbi request reprint Meniscofemoral ligaments--structural and material properties
    Chinmay M Gupte
    Department of Mechanical Engineering, Imperial College, University of London, Exhibition Road, London SW7 2BX, UK
    J Biomech 35:1623-9. 2002
    ..Such hypotheses include roles for the ligaments in knee stability and guiding meniscal motion...
  57. ncbi request reprint The meniscofemoral ligaments: secondary restraints to the posterior drawer. Analysis of anteroposterior and rotary laxity in the intact and posterior-cruciate-deficient knee
    Chinmay M Gupte
    Department of Mechanical Engineering, Imperial College, London, England, UK
    J Bone Joint Surg Br 85:765-73. 2003
    ..The integrity of these structures should be assessed during both imaging and arthroscopic studies of PCL-injured knees since this may affect the diagnosis and management of such injuries...
  58. ncbi request reprint Surgical biomechanics of the patellofemoral joint
    Julian Ashley Feller
    La Trobe University Medical Centre, Bundoora, Australia
    Arthroscopy 23:542-53. 2007
    ..Surgical intervention for patellofemoral problems needs to be planned carefully and take into account an individual's anatomy...
  59. ncbi request reprint A novel technique to measure active tendon forces: application to the subscapularis tendon
    Anthony M J Bull
    Department of Bioengineering, Imperial College London, Bagrit Centre, Mechanical Engineering Building, South Kensington Campus, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 13:145-50. 2005
    ..The AIFP was then retrieved through an arthroscopic portal. The technique showed that the subscapularis may produce forces of 250 N during maximum internal rotation of the shoulder...
  60. ncbi request reprint The effect of femoral attachment location on anterior cruciate ligament reconstruction: graft tension patterns and restoration of normal anterior-posterior laxity patterns
    T Dionyssios Zavras
    Biomechanics Section, Imperial College London, Room 638, Mechanical Engineering Building, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 13:92-100. 2005
    ..Grafts attached to the roof of the intercondylar notch caused overconstraint and higher tension in the flexed knee...
  61. ncbi request reprint The remains of anterior cruciate ligament graft tension after cyclic knee motion
    Markus P Arnold
    Department of Orthopaedic Surgery, University Hospital, Hanzeplein 1, NL 9700 RB Groningen, The Netherlands
    Am J Sports Med 33:536-42. 2005
    ..One of the contributing factors might be a loss in graft tension. It is unknown whether the tension imposed on an anterior cruciate ligament graft degrades with time and, if so, the effect of that loss of tension on knee laxity...
  62. ncbi request reprint Validation of the 65 degrees Howell guide for anterior cruciate ligament reconstruction
    Pierluigi Cuomo
    First Orthopaedic Clinic, University of Florence, Florence, Italy
    Arthroscopy 22:70-5. 2006
    ..To study in cadaver knees the position of the tibial tunnel in anterior cruciate ligament (ACL) reconstruction using the 65 degrees Howell guide (Arthrotek, Ontario, CA)...
  63. ncbi request reprint The cartilaginous and osseous geometry of the femoral trochlear groove
    Yi Fen Shih
    Department of Mechanical Engineering, Imperial College, London SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 12:300-6. 2004
    ..8 degrees ) surfaces. Articular cartilage is not well represented on radiography yet it had a significant effect on the distal femoral geometry, and should be taken into account when evaluating the patellofemoral joint...
  64. ncbi request reprint Arthroscopic appearances of the meniscofemoral ligaments: introducing the "meniscal tug test"
    Chinmay M Gupte
    Department of Musculoskeletal Surgery, Charing Cross Hospital, London, UK
    Knee Surg Sports Traumatol Arthrosc 14:1259-65. 2006
    ..This will also aid studies examining the role of the MFLs in stabilising the PCL-deficient knee...
  65. ncbi request reprint The role of the medial collateral ligament and posteromedial capsule in controlling knee laxity
    James R Robinson
    Mechanical Engineering Department, Imperial College London, London SW7 2AZ, UK
    Am J Sports Med 34:1815-23. 2006
    ..The medial aspect of the knee has a complex capsular structure; the biomechanical roles of specific structures are not well understood...
  66. ncbi request reprint The effects of glenoid component alignment variations on cement mantle stresses in total shoulder arthroplasty
    Andrew R Hopkins
    Biomechanics Section, Mechanical Engineering Department, Imperial College London, Room 209, Mechanical Engineering Building, South Kensington Campus, London, UK SW7 2AZ
    J Shoulder Elbow Surg 13:668-75. 2004
    ..The study suggests that significant efforts should be made to align the glenoid component correctly and also to ensure suitably consistent support of the prosthesis within the bone...
  67. ncbi request reprint RSA can measure ACL graft stretching and migration: development of a new method
    Rashid Khan
    Institute for Musculoskeletal Surgery, Imperial College London, England
    Clin Orthop Relat Res 448:139-45. 2006
    ..This method of anterior cruciate ligament graft analysis provides a new way to ascertain laxity changes in the reconstruction after surgery...
  68. ncbi request reprint Basic fibroblast growth factor mediates transduction of mechanical signals when articular cartilage is loaded
    Tonia L Vincent
    The Kennedy Institute of Rheumatology, London, UK
    Arthritis Rheum 50:526-33. 2004
    ..To determine whether the basic fibroblast growth factor (bFGF) mediates signal transduction in articular cartilage in response to mechanical loading...
  69. ncbi request reprint Persistence of the mini pivot shift after anatomically placed anterior cruciate ligament reconstruction
    Denny T T Lie
    Department of Orthopaedic Surgery, Singapore General Hospital, Singapore
    Clin Orthop Relat Res 457:203-9. 2007
    ..More sophisticated reconstruction methods may be required to control rotation. Objective restoration of anteroposterior laxity to normal does not necessarily return knee kinematics, especially rotational behavior, to normal...
  70. ncbi request reprint The effect of muscle loading on the simulation of bone remodelling in the proximal femur
    Charalampos Bitsakos
    Mechanical Engineering Department, Imperial College London, Exhibition Road, London SW7 2AZ, UK
    J Biomech 38:133-9. 2005
    ..The results of this study suggest that the loading configuration of the FE model does play an important role in the outcome of the remodelling simulation...
  71. ncbi request reprint Double-bundle "anatomic" anterior cruciate ligament reconstruction: a cadaveric study of tunnel positioning with a transtibial technique
    Francesco Giron
    First Orthopaedic Clinic, University of Florence, Florence, Italy
    Arthroscopy 23:7-13. 2007
    ..The aim of this study was to examine whether a double-bundle anterior cruciate ligament (ACL) reconstruction with a transtibial approach could position the tibial and femoral tunnels accurately in the native bundle attachments...
  72. ncbi request reprint Passive tension and gap formation of rotator cuff repairs
    Peter Reilly
    St Mary s Hospital, London, UK
    J Shoulder Elbow Surg 13:664-7. 2004
    ..Twenty-four hours of 34-N loading caused gap formation of 9 mm in cadaveric rotator cuff repairs. Passive tension in surgically repaired rotator cuffs may contribute to repair failure and can be modified by arm positioning...
  73. ncbi request reprint Active patellar tracking measurement: a novel device using ultrasound
    Yi Fen Shih
    Mechanical Engineering Department, Imperial College, London, England
    Am J Sports Med 32:1209-17. 2004
    ..Many patients suffer patellar instability that may relate to transient patellar tracking abnormalities...
  74. ncbi request reprint A comparison of five tibial-fixation systems in hamstring-graft anterior cruciate ligament reconstruction
    Simon D Coleridge
    Biomechanics Section, Mechanical Engineering Department, Room 638, Mechanical Engineering Building, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
    Knee Surg Sports Traumatol Arthrosc 12:391-7. 2004
    ..This evidence suggests that it may now be safe to mobilise younger patients less cautiously immediately after hamstring-graft ACL reconstruction...
  75. ncbi request reprint Metabolism and composition of the canine anterior cruciate ligament relate to differences in knee joint mechanics and predisposition to ligament rupture
    Eithne J Comerford
    Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS40 5DU, UK
    J Orthop Res 23:61-6. 2005
    ..Variations in ACL biochemistry and knee mechanics could account for divergent predispositions to ligament rupture...
  76. ncbi request reprint Wear in the prosthetic shoulder: association with design parameters
    Andrew R Hopkins
    Biomechanics Section, Mechanical Engineering Department, Imperial College London, London, SW7 2AZ, UK
    J Biomech Eng 129:223-30. 2007
    ....
  77. ncbi request reprint Structural properties of the medial collateral ligament complex of the human knee
    James R Robinson
    Biomechanics Section, Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, Exhibition Rd, London SW7 2BX, UK
    J Biomech 38:1067-74. 2005
    ..In summary, the structural properties of the different component structures of the medial ligament complex indicate possible functional significance...
  78. ncbi request reprint Finite element models of total shoulder replacement: application of boundary conditions
    Andrew R Hopkins
    Biomechanics Section, Mechanical Engineering Department, Imperial College, South Kensington Campus, London SW7 2AZ, UK
    Comput Methods Biomech Biomed Engin 8:39-44. 2005
    ..The study suggests that the use of a fully defined scapula (hard- and soft-tissue) is particularly important when investigating fixation, whilst less comprehensive models should be appropriate for studies of the prosthesis exclusively...
  79. ncbi request reprint The attachments of the anteromedial and posterolateral fibre bundles of the anterior cruciate ligament: Part 1: tibial attachment
    Andrew Edwards
    Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK
    Knee Surg Sports Traumatol Arthrosc 15:1414-21. 2007
    ..The overall dimensions of the tibial plateaux correlated significantly with many measurements. The results from this study could be used to guide ACL reconstruction techniques...
  80. ncbi request reprint The attachments of the fiber bundles of the posterior cruciate ligament: an anatomic study
    Andrew Edwards
    Department of Mechanical Engineering, Imperial College London, London, England
    Arthroscopy 23:284-90. 2007
    ..This study aimed to provide data on the sizes and locations of the attachments of the posterior cruciate ligament (PCL) to the tibia and the femur...
  81. ncbi request reprint The effects of different tensioning strategies on knee laxity and graft tension after double-bundle anterior cruciate ligament reconstruction
    Pierluigi Cuomo
    First Orthopaedic Clinic, University of Florence, Florence, Italy
    Am J Sports Med 35:2083-90. 2007
    ..Double-bundle anterior cruciate ligament reconstruction replicates the 2 functional bundles of the native ligament, the posterolateral and the anteromedial, to control anteroposterior and rotational laxity...
  82. ncbi request reprint Glenohumeral kinematics following total shoulder arthroplasty: a finite element investigation
    Andrew R Hopkins
    Biomechanics Section, Mechanical Engineering Department, Imperial College London, Room 637, Mechanical Engineering Building, South Kensington Campus, London, UK SW7 2AZ
    J Orthop Res 25:108-15. 2007
    ....
  83. pmc The width:thickness ratio of the patella: an aid in knee arthroplasty
    Farhad Iranpour
    Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Imperial College London, 7th Floor, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK
    Clin Orthop Relat Res 466:1198-203. 2008
    ..The width:thickness ratio appears anatomically constant and may be a useful guide for estimating premorbid patellar thickness...
  84. ncbi request reprint Supraspinatus tears: propagation and strain alteration
    Peter Reilly
    Department of Mechanical Engineering, Imperial College London, England
    J Shoulder Elbow Surg 12:134-8. 2003
    ..54% (120 degrees ) and with load by 2.53% (200 N). Tear propagation was observed from joint to bursal sides during abduction. Tendon failure occurred at the insertion...
  85. ncbi request reprint The magnitude of cutting forces at high speed
    Kanaan Elias
    Eastman Dental Institute for Oral Health Care Sciences, Department of Conservative Dentistry, University College London and Imperial College, University of London, United Kingdom
    J Prosthet Dent 89:286-91. 2003
    ..Previous research has used a range of cutting forces for preparing teeth, but there are no data available on the forces actually imposed while cutting teeth with high-speed handpieces...
  86. ncbi request reprint Femoral attachment of the anterior cruciate ligament
    Francesco Giron
    First Orthopaedic Clinic, University of Florence, Italy
    Knee Surg Sports Traumatol Arthrosc 14:250-6. 2006
    ..The purpose of this article is to describe the anatomy of the femoral ACL insertion and to discuss the surgical techniques used to replicate it...
  87. ncbi request reprint Finite element modelling of glenohumeral kinematics following total shoulder arthroplasty
    Andrew R Hopkins
    Biomechanics Section, Mechanical Engineering Department, Imperial College London, Room 636, Mechanical Engineering Building, South Kensington Campus, London SW7 2AZ, UK
    J Biomech 39:2476-83. 2006
    ..Inherently, the method also evaluates the glenoid fixation stresses in the relatively weak glenoid bone stock. Hence, design characteristics can be simultaneously optimised against dislocation as well as glenoid loosening...
  88. doi request reprint The effect of different insertion points on the security of pedicle screw fixation in bovine vertebrae
    Maan Al-Hadithi
    Musculoskeletal Surgery Group, Imperial College London School of Medicine, London, UK
    Spine (Phila Pa 1976) 33:169-72. 2008
    ..Cyclic loading of pedicle screws inserted into bovine vertebrae was applied and the security of fixation was assessed as a function of the point of insertion of the screws...