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    • Hans Klaus Uhthoff†
    • Hans Klaus Uhthoff†: Influence Statistics

      Hans Klaus Uhthoff†

      Hans Klaus Uhthoff†

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      Division of Orthopaedic Surgery, Department of Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada | Bone and Joint Research Laboratory, Ottawa Hospital Research Institute, ...

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      Hans Klaus Uhthoff†:Expert Impact

      Concepts for whichHans Klaus Uhthoff†has direct influence:Fat accumulation,Supraspinatus tendon,Rotator cuff,Bed rest,Tensile strength,Articular cartilage,Club foot,Bone growth.

      Hans Klaus Uhthoff†:KOL impact

      Concepts related to the work of other authors for whichfor which Hans Klaus Uhthoff† has influence:Rotator cuff,Calcific tendinitis,Supraspinatus tendon,Fracture healing,Bone marrow,Articular cartilage,Shoulder pain.

      KOL Resume for Hans Klaus Uhthoff†

      Year
      2021

      Division of Orthopaedic Surgery, Department of Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada

      2020

      Bone and Joint Research Laboratory, Division of Physical and Rehabilitation Medicine, Department of Medicine, Ottawa Hospital Research Institute, 505 Smyth Road, Ottawa, ON K1H 8M5, Canada.

      Division of Orthopedic Surgery, Department of Surgery, University of Ottawa, Ottawa, Ontario Canada

      2019

      Bone and Joint Research Laboratory, Department of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada; Department of Surgery, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada, View further author information

      2018

      The Bone and Joint Research Laboratory, University of Ottawa; Department of Medicine, University of Ottawa.

      Bone and Joint Research Laboratory, Faculty of Medicine, University of Ottawa, Ottawa, ON, CANADA.

      2017

      Bone and Joint Research Laboratory, The Ottawa Hospital Rehabilitation Centre, 505 Smyth Rd., Ottawa, ON, K1H 8M2 Canada

      2014

      Bone and Joint Research Laboratory, University of Ottawa, Ottawa, Ontario, Canada; Division of Orthopedic Surgery, Department of Surgery, University of Ottawa, Ottawa, Ontario, Canada.

      Department of Surgery University of Ottawa Ottawa Ontario Canada

      2012

      Bone and Joint Research Laboratory,

      Children’s Hospital of Eastern Ontario, Division of Orthopedic Surgery, University of Ottawa, Ottawa, Ontario, Canada

      2011

      Bone and Joint Laboratory, University of Ottawa, 451 Smyth Rd, Ottawa, Ontario, Canada K1H 8M5

      2010

      Division of Orthopedics, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada

      2009

      Bone and Joint Laboratory, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 5M2, Canada

      Professor and Charles A. Rockwood Jr, MD, Chair, Department of Orthopaedics, The University of Texas Health Science Center at San Antonio, San Antonio, Texas

      Medical Director, University of Washington Sports Medicine, Seattle, Washington

      2008

      Division of Orthopedics, University of Ottawa, The Ottawa Hospital, 1648 Critical Care Wing, Box 502, 501 Smyth Road, Ottawa, Ontario, Canada K1H 8L6

      2007

      The Bone and Joint Laboratory and The Division of Physical Medicine and Rehabilitation The University of Ottawa Ottawa, Ontario, Canada; The Department of Biochemistry, Microbiology and Immunology The University of Ottawa Ottawa, Ontario, Canada, and the The Bone and Joint Laboratory and The Division of Orthopaedic Surgery The University of Ottawa Ottawa, Ontario, Canada

      University of Ottawa, Ottawa, Ontario, Kanada

      2006

      Bone and Joint Research Laboratory, Faculty of Medicine, Division of Orthopaedic Surgery, University of Ottawa, 1321-451 Smyth Road, Ottawa, Ontario K1H 8M5 Canada

      2005

      Bone and Joint Research Laboratory, Department of Medicine, Faculty of Medicine, University of Ottawa, ON, Canada

      Professor emeritus, Department of Surgery, University of Ottawa, Kanada

      2004

      The Bone and Joint Research Laboratory, University of Ottawa; and Department of Surgery, Division of Orthopaedic Surgery, University of Ottawa, Ottawa, Ontario K1H 5M2, Canada

      2003

      Division of Orthopaedic Surgery (Uhthoff), University of Ottawa, Ottawa ON, Canada

      2002

      Professor Emeritus University of Ottawa 5004-501 Smyth Rd Ottawa ON K1H 8L6 Canada

      2001

      Bone and Joint Research Laboratory, Room 1319, University of Ottawa, 451 Smyth Road, Ottawa, Canada K1H 8M5, Tel.: +1‐613‐562‐5800, ext. 8238; fax: +1‐613‐737‐8837

      Division of Orthopaedic Surgery, University of Ottawa, Ottawa, Canada

      2000

      Division of Orthopaedic Surgery, Ottawa General Hospital, 501 Smyth Road, Ottawa, Ontario, Canada K1H 8L6.

      From the Bone and Joint Research Laboratory, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.

      1999

      Bone and Joint Research Laboratory, Division of Orthopaedic Surgery, University of Ottawa Ottawa, Canada.

      Department of Orthopedic Surgery, Ottawa, Ontario, Canada

      1998

      Division of Orthopaedic Surgery

      1997

      Ottawa and Toronto, Ontario, Canada

      Division of Orthopaedic Surgery (HKU)

      1996

      Ottawa, Ontario, Canada

      1995

      Division of Orthopaedic Surgery, University of Ottawa, Ontario, Canada.

      1994

      Bone and Joint Research Laboratory and Department of Surgery, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada

      1993

      Division of Orthopaedics, School of Medicine, University of Ottawa, Ontario, Canada

      1992

      Departments of Surgery and Pathology, University of Ottawa, Ottawa, Ontario, Canada

      1991

      Division of Orthopaedic Surgery, Ottawa General Hospital, Ontario, Canada.

      Department of Surgery, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada

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      Sample of concepts for which Hans Klaus Uhthoff† is among the top experts in the world.
      Concept World rank
      fat clumps #1
      achilles tendons bmd #1
      trabecular bone healing #1
      loosecelled area #1
      immobilization marrow #1
      articular limitations #1
      chondrocytes joint immobilization #1
      lesions substance #1
      immobilization metacarpus #1
      dualcryofixation assembly #1
      test bones #1
      defined remobilization period #1
      4‐week time #1
      fat accumulation supraspinatus #1
      unapposed articular #1
      rats knee joints #1
      thickened bursal wall #1
      ssp humeral footprint #1
      laser hole grid #1
      adipocyte hypertrophy hyperplasia #1
      histology ssp tendon #1
      proper diagnosis algorithm #1
      tendon bone construct #1
      unloaded articular #1
      erythrocyte loss hemoconcentration #1
      24 weeks formation #1
      quarter detached #1
      attachment supraspinatus tendon #1
      diaphyseal compacta #1
      channeling groups #1
      attachment supraspinatus #1
      malformations notochordal #1
      knees area #1
      authors biomechanical effects #1
      phenomenon adjustment #1
      cuff tendinopathies tendon #1
      longlasting contractures #1
      callus device #1
      arthritic conditions shoulder #1
      p00005 proximal quarter #1
      subacromial bursa role #1
      implant removal refracture #1
      microm2 p05 #1
      urobilinogen concentration #1
      Sign-in to see all concepts, it's free!

      Prominent publications by Hans Klaus Uhthoff†

      KOL-Index: 11729

      OBJECTIVES: To test the hypotheses that contractures progress at different rates in relation to the time after immobilization, that immobilization in flexion leads to loss of extension range of motion, and that joints of sham-operated animals are better controls than the contralateral joint of experimental animals.

      STUDY DESIGN: Experimental, controlled study in which 40 adult rats had one knee joint immobilized at 135 degrees of flexion for up to 32 weeks and 20 animals underwent a sham ...

      Known for Joint Motion | 16 Weeks | Articular Rats | Flexion Extension | Prolonged Immobility
      KOL-Index: 11605

      Immobility in bed and decreased mobility cause adaptations to most human body systems. The effect of immobility on fat accumulation in hemopoietic bone marrow has never been measured prospectively. The reversibility of marrow fat accumulation and the effects on hemopoiesis are not known. In the present study, 24 healthy women (age: 25-40 yr) underwent -6 degrees head-down bed rest for 60 days. We used MRI to noninvasively measure the lumbar vertebral fat fraction at various time points. ...

      Known for Bed Rest | Marrow Fat | Time Points | Space Simulation | Accumulation 60
      KOL-Index: 10761

      INTRODUCTION: Reattachment of the supraspinatus (SSP) tendon after spontaneous rupture leads to improved shoulder function. Whether this improvement of function is due to a reversal of muscle atrophy and fat accumulation known to occur after SSP rupture is still debated. Our previous study of late reattachment of SSP (12 weeks) failed to confirm a reversal of muscle atrophy and of fat accumulation.

      PURPOSE: To find out whether earlier reattachment (6 weeks) reverses atrophy and fat ...

      Known for Fat Accumulation | Muscle Atrophy | 6 Weeks | Supraspinatus Ssp | Cuff Rotator
      KOL-Index: 10418

      Muscle atrophy and fat accumulation occur after rotator cuff tearing. Whether these changes are reversible after a successful repair is still unknown. Imaging allows only a semi-quantitative assessment of muscle atrophy and fat deposition. As only experimental studies permit a quantification of both, a unilateral detachment and wrapping in a polyvinylidine fluoride membrane of the supraspinatus was done in 22 rabbits. After 12 weeks, the polyvinylidine fluoride membrane was removed in 10 ...

      Known for Fat Accumulation | Muscle Atrophy | Cuff Rotator | Supraspinatus Tendon | 12 Weeks
      KOL-Index: 9899

      Joint contractures alter the mechanical properties of articular and muscular structures. Reversibility of a contracture depends on the restoration of the elasticity of both structures. We determined the differential contribution of articular and muscular structures to knee flexion contractures during spontaneous recovery. Rats (250, divided into 24 groups) had one knee joint surgically fixed in flexion for six different durations, from 1 to 32 wk, creating joint contractures of various ...

      Known for Joint Contractures | Rat Model | Motion Articular | Spontaneous Recovery | Skeletal Range
      KOL-Index: 9516

      OBJECTIVES: To measure articular structures' contribution to the limitation of range of motion after joint immobility.

      STUDY DESIGN: Experimental, controlled study involving 40 adult rats that had one knee joint immobilized in flexion for durations of 2, 4, 8, 16, and 32 weeks; 20 rats underwent a sham procedure. The angular displacement was measured both in flexion and extension at three different torques. Myotomy of transarticular muscles allowed isolation of the arthrogenic component ...

      Known for Rat Knee | Range Motion | 2 Weeks | Flexion Extension | Joint Immobility
      KOL-Index: 9454

      PURPOSE: To quantify in a longitudinal study non-chondrocytic cells and chondrocytes, tissular architecture as well as extracellular matrix restoration during the formation of an enthesis following supraspinatus tendon attachment to the humerus.

      METHODS: In 89 rabbits, one supraspinatus fibrocartilaginous enthesis was resected and the tendon either attached to the greater tuberosity (n=75) or not attached (n=14). The animals were sacrificed after 2, 6, 8, 12 or 24 weeks. The operated and ...

      Known for Supraspinatus Tendon | 2 Weeks | New Enthesis | Histologic Study | Diffracted Polarized Light
      KOL-Index: 9313

      PURPOSE: To quantify the accumulation, progression, and distribution of fat separately in and around the supraspinatus muscle from the onset of tendon detachment and to validate computed tomography (CT) for quantification of fat content by using volumetry and histomorphometry as reference standards.

      MATERIALS AND METHODS: Institutional animal care committee approval was obtained. The supraspinatus tendon of 30 adult female rabbits (3.0 kg) was detached. Rabbits were sacrificed in groups ...

      Known for Intramuscular Fat | Cuff Rotator | Supraspinatus Tendon | 12 Weeks | Computed Tomography
      KOL-Index: 9303

      The purpose of this investigation was to determine the relationship between the degree of degeneration at the supraspinatus insertion, the tensile strength, and the site of failure of this tendon. Thirty-three fresh cadaveric shoulders (average age: 62 years; range: 39-83 years) were examined. A tensile load to failure was applied at a constant crosshead speed of 25.4 mm/min to a 10 mm wide strip of the supraspinatus tendon that remained attached to the bone. Preexisting degenerative ...

      Known for Tensile Strength | Supraspinatus Tendon | Degeneration Insertion | Histologic Study | Aged Rotator
      KOL-Index: 9068

      Metal plates for internal fixation of fractures have been used for more than 100 years. Although initial shortcomings such as corrosion and insufficient strength have been overcome, more recent designs have not solved all problems. Further research is needed to develop a plate that accelerates fracture healing while not interfering with bone physiology. The introduction of rigid plates had by far the greatest impact on plate fixation of fractures. However, it led to cortical porosis, ...

      Known for Plate Fixation | Internal Fracture | Contact Area | Materials Bone | 100 Years
      KOL-Index: 9000

      OBJECTIVE: To measure the biomechanical effects of immobilization on the Achilles' tendon.

      DESIGN: Experimental, controlled study.

      SETTING: Physiatry research laboratory.

      ANIMALS: Twenty adult rabbits.

      INTERVENTION: One hindlimb immobilized in a cast for 4 weeks (n=10) or 8 weeks (n=10). The contralateral legs (n=20) served as controls.

      MAIN OUTCOME MEASURES: Cross-sectional Achilles' tendon area, mode of failure, mean failure load, and tendon stiffness.

      RESULTS: The Achilles' tendon ...

      Known for Achilles Tendon | 4 Weeks | Animals Biomechanical | Experimental Controlled Study | Weight Bearing
      KOL-Index: 8393

      Fat accumulates in the bone marrow of lumbar vertebrae with bed rest. Exercise with or without whole body vibration may counter this effect. Our objectives were to measure 1) the vertebral fat fraction (VFF) of men subjected to bed rest who performed resistive exercises with (RVE, n = 7) or without whole body vibration(RE, n = 8) or no exercise (CTR, n = 9) using three MRI techniques; and 2) changes in peripheral blood counts. Twenty-four healthy men (age: 20-45 yr) underwent -6° ...

      Known for Bed Rest | Body Vibration | Marrow Fat | Lumbar Vertebrae | Head Tilt

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      Division of Orthopaedic Surgery, Department of Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada | Bone and Joint Research Laboratory, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada | Division of Orthopaedic Surgery, The Ottawa Hospi

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