Christian Gerber

Summary

Affiliation: Balgrist University Hospital
Country: Switzerland

Publications

  1. pmc Effect of age on fatty infiltration of supraspinatus muscle after experimental tendon release in rats
    Mazda Farshad
    Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    BMC Res Notes 4:530. 2011
  2. ncbi request reprint [Static anterior glenohumeral subluxation following coracoid bone block in combination with pectoralis major transfer: a case report and biomechanical considerations]
    C M L Werner
    Service d Orthopedie, Clinique Universitaire Balgrist, Forchstr 340, 8008 Zurich, Suisse
    Rev Chir Orthop Reparatrice Appar Mot 90:156-60. 2004
  3. ncbi request reprint Effect of tendon release and delayed repair on the structure of the muscles of the rotator cuff: an experimental study in sheep
    C Gerber
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 86:1973-82. 2004
  4. ncbi request reprint Subscapularis muscle function and structure after total shoulder replacement with lesser tuberosity osteotomy and repair
    Christian Gerber
    Department of Orthopedic Surgery, Balgrist Hospital, Forchstrasse 340, 8032 Zurich, Switzerland
    J Bone Joint Surg Am 87:1739-45. 2005
  5. doi request reprint Dynamic imaging and function of partial supraspinatus tendon tears
    Christian Gerber
    Department of Orthopaedics, University Hospital, Balgrist, Zurich, Switzerland
    Arthroscopy 27:1180-6. 2011
  6. ncbi request reprint Single-stage bilateral total shoulder arthroplasty: a preliminary study
    C Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Bone Joint Surg Br 88:751-5. 2006
  7. ncbi request reprint Lesser tuberosity osteotomy for total shoulder arthroplasty. Surgical technique
    Christian Gerber
    Department of Orthopedic Surgery, Balgrist Hospital, Forchstrasse 340, 8032 Zurich, Switzerland
    J Bone Joint Surg Am 88:170-7. 2006
  8. ncbi request reprint Latissimus dorsi transfer for the treatment of irreparable rotator cuff tears
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 88:113-20. 2006
  9. ncbi request reprint Static posterior humeral head subluxation and total shoulder arthroplasty
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 18:505-10. 2009
  10. ncbi request reprint Correlation of atrophy and fatty infiltration on strength and integrity of rotator cuff repairs: a study in thirteen patients
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 16:691-6. 2007

Detail Information

Publications103 found, 100 shown here

  1. pmc Effect of age on fatty infiltration of supraspinatus muscle after experimental tendon release in rats
    Mazda Farshad
    Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    BMC Res Notes 4:530. 2011
    ..abstract:..
  2. ncbi request reprint [Static anterior glenohumeral subluxation following coracoid bone block in combination with pectoralis major transfer: a case report and biomechanical considerations]
    C M L Werner
    Service d Orthopedie, Clinique Universitaire Balgrist, Forchstr 340, 8008 Zurich, Suisse
    Rev Chir Orthop Reparatrice Appar Mot 90:156-60. 2004
    ..Inversely, the tendon of the pectoralis major passed in front of the conjoint tendon because of the absence of the subscapularis and could have been the cause of the aggravated anterior subluxation...
  3. ncbi request reprint Effect of tendon release and delayed repair on the structure of the muscles of the rotator cuff: an experimental study in sheep
    C Gerber
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 86:1973-82. 2004
    ..The purpose of this study was to examine the amount of muscle atrophy and fatty infiltration in an animal model and to determine whether the repair of a long-standing tendon tear can reverse these changes...
  4. ncbi request reprint Subscapularis muscle function and structure after total shoulder replacement with lesser tuberosity osteotomy and repair
    Christian Gerber
    Department of Orthopedic Surgery, Balgrist Hospital, Forchstrasse 340, 8032 Zurich, Switzerland
    J Bone Joint Surg Am 87:1739-45. 2005
    ....
  5. doi request reprint Dynamic imaging and function of partial supraspinatus tendon tears
    Christian Gerber
    Department of Orthopaedics, University Hospital, Balgrist, Zurich, Switzerland
    Arthroscopy 27:1180-6. 2011
    ..It was the purpose of this study to identify and document normal and abnormal supraspinatus tendon function in vivo using real-time ultrasound...
  6. ncbi request reprint Single-stage bilateral total shoulder arthroplasty: a preliminary study
    C Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Bone Joint Surg Br 88:751-5. 2006
    ....
  7. ncbi request reprint Lesser tuberosity osteotomy for total shoulder arthroplasty. Surgical technique
    Christian Gerber
    Department of Orthopedic Surgery, Balgrist Hospital, Forchstrasse 340, 8032 Zurich, Switzerland
    J Bone Joint Surg Am 88:170-7. 2006
    ....
  8. ncbi request reprint Latissimus dorsi transfer for the treatment of irreparable rotator cuff tears
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 88:113-20. 2006
    ..Latissimus dorsi transfer to the greater tuberosity has been proposed for the treatment of irreparable tears associated with severe functional impairment and chronic, disabling pain...
  9. ncbi request reprint Static posterior humeral head subluxation and total shoulder arthroplasty
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 18:505-10. 2009
    ....
  10. ncbi request reprint Correlation of atrophy and fatty infiltration on strength and integrity of rotator cuff repairs: a study in thirteen patients
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 16:691-6. 2007
    ..With current repair techniques, atrophy and fatty infiltration appear to be irreversible, despite successful tendon repair. Unexpectedly, not only weak but also very strong muscles are at risk for repair failure...
  11. ncbi request reprint Effect of selective capsulorrhaphy on the passive range of motion of the glenohumeral joint
    C Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Bone Joint Surg Am 85:48-55. 2003
    ..Capsulorrhaphy of the glenohumeral joint is a common surgical procedure for the treatment of instability caused by increased capsular laxity. The effect of capsulorrhaphy on the range of motion of the shoulder is poorly understood...
  12. ncbi request reprint Reverse Delta-III total shoulder replacement combined with latissimus dorsi transfer. A preliminary report
    Christian Gerber
    University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 89:940-7. 2007
    ..In this preliminary study, we assessed the results of the combination of a latissimus dorsi transfer to the greater tuberosity and a reverse total shoulder arthroplasty in the presence of lost active external rotation...
  13. doi request reprint Suture slippage in knotless suture anchors as a potential failure mechanism in rotator cuff repair
    Karl Wieser
    Orthopaedic Department, University of Zurich, Balgrist Hospital, Switzerland
    Arthroscopy 28:1622-7. 2012
    ..To quantify the strength of suture fixation of knotless suture anchors in relation to the anchors' pullout strength and to compare these results with the static friction between different sutures and anchor materials...
  14. doi request reprint The Latarjet procedure for the treatment of recurrence of anterior instability of the shoulder after operative repair: a retrospective case series of forty-nine consecutive patients
    Samuel L Schmid
    Department of Orthopaedics, University Hospital Balgrist, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 94:e75. 2012
    ..The purpose of this study was to verify the hypothesis that this procedure is also effective for treating recurrent glenohumeral instability after previous operative repair...
  15. doi request reprint Rotator cuff muscles lose responsiveness to anabolic steroids after tendon tear and musculotendinous retraction: an experimental study in sheep
    Christian Gerber
    Balgrist University Hospital, University of Zurich, Switzerland
    Am J Sports Med 40:2454-61. 2012
    ..Although continuous musculotendinous relengthening can experimentally restore muscular architecture, restoration of atrophy and fatty infiltration is hitherto impossible...
  16. ncbi request reprint Failure of anterior shoulder instability repair caused by eyelet cutout of absorbable suture anchors
    Dominik C Meyer
    Department of Orthopaedics, University of Zurich, Zurich, Switzerland
    Arthroscopy 20:521-3. 2004
    ..This is the first clinical report of unambiguous structural suture anchor failure. These observations emphasize the sensitivity of Bankart repair to weak links in the repair chain, which must be avoided...
  17. ncbi request reprint Radiographic and computed tomography analysis of cemented pegged polyethylene glenoid components in total shoulder replacement
    Edward H Yian
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 87:1928-36. 2005
    ..The purpose of this study was to evaluate, with use of a sensitive and reproducible imaging method, the radiographic and clinical results of total shoulder replacement with a pegged, cemented polyethylene glenoid implant...
  18. ncbi request reprint Effects of glenoid component version on humeral head displacement and joint reaction forces: an experimental study
    Richard W Nyffeler
    Department of Orthopaedics, University of Zurich, Balgrist Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 15:625-9. 2006
    ..Therefore, assessment of loosening and instability justifies precise assessment of glenoid component version...
  19. doi request reprint Assessment of glenoid inclination on routine clinical radiographs and computed tomography examinations of the shoulder
    Alexander Maurer
    Department of Orthopedic Surgery, University Hospital, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 21:1096-103. 2012
    ..The purpose of this study was to develop an accurate and reproducible measurement for glenoid inclination on standardized anterior-posterior (AP) radiographs and on computed tomography (CT) images...
  20. doi request reprint In vitro assessments of reverse glenoid stability using displacement gages are misleading - recommendations for accurate measurements of interface micromotion
    Philippe Favre
    Laboratory for Orthopedic Research, Department of Orthopedics, Balgrist, University of Zurich, Switzerland
    Clin Biomech (Bristol, Avon) 26:917-22. 2011
    ..We hypothesized that a remotely positioned displacement gage measures elastic deformation of the system rather than actual micromotion at the implant/bone interface...
  21. ncbi request reprint Influence of humeral prosthesis height on biomechanics of glenohumeral abduction. An in vitro study
    Richard W Nyffeler
    Investigation performed at the Department of Orthopaedic Surgery, University of Zurich, Balgrist, Zurich, Switzerland
    J Bone Joint Surg Am 86:575-80. 2004
    ..The purpose of the present study was to determine the effect of humeral prosthesis height on range of motion and on the moment arms of the rotator cuff muscles during glenohumeral abduction...
  22. doi request reprint Loss of the sclerotic line of the glenoid on anteroposterior radiographs of the shoulder: a diagnostic sign for an osseous defect of the anterior glenoid rim
    Linas Jankauskas
    Department of Orthopaedics, University of Zurich, Uniklinik Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 19:151-6. 2010
    ..The integrity of the glenoid defines the surgical treatment in anterior shoulder instabilities. The reliability of plain radiographs to detect anterior glenoid rim deficiencies was determined...
  23. doi request reprint Stitch positioning influences the suture hold in supraspinatus tendon repair
    Karl Wieser
    Orthopaedic Department, Balgrist Hospital, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    Knee Surg Sports Traumatol Arthrosc 21:1587-92. 2013
    ..This study was designed to compare the pull-out strength of simple suture stitches in human supraspinatus tendons with respect to the position of the rotator cable...
  24. pmc Device for lengthening of a musculotendinous unit by direct continuous traction in the sheep
    Matthias A Zumstein
    Dept of Orthopedics, University of Zurich, Balgrist, Zurich, 8008, Switzerland
    BMC Vet Res 8:50. 2012
    ..The tendon end, which was previously released (16 weeks prior) from its insertion site with a bone chip, was elongated with a velocity of 1 mm/day...
  25. pmc Revision of reversed total shoulder arthroplasty. Indications and outcome
    Mazda Farshad
    Balgrist University Hospital, University of Zurich, Zurich, Switzerland
    BMC Musculoskelet Disord 13:160. 2012
    ..It was therefore the purpose of this retrospective study, to identify the reasons for revision of RTSA and to report outcomes...
  26. doi request reprint The effect of component positioning on intrinsic stability of the reverse shoulder arthroplasty
    Philippe Favre
    Laboratory for Orthopaedic Research, Department of Orthopaedics, Balgrist, University of Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 19:550-6. 2010
    ..This should provide guidelines on how to best position the implant components to decrease the rate of dislocation...
  27. ncbi request reprint Long-term outcome after structural failure of rotator cuff repairs
    Bernhard Jost
    Department of Orthopedics, University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 88:472-9. 2006
    ..2 years postoperatively. It was the purpose of this study to determine the clinical and structural outcomes of these reruptures in the same twenty patients after a longer period of follow-up...
  28. doi request reprint Changes in shoulder muscle function with humeral position: a graphical description
    Philippe Favre
    Department of Orthopaedics, Balgrist, University of Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 18:114-21. 2009
    ..Two examples illustrate the use of this data, particularly to clarify clinical issues...
  29. doi request reprint Neer Award 2007: Reversion of structural muscle changes caused by chronic rotator cuff tears using continuous musculotendinous traction. An experimental study in sheep
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 18:163-71. 2009
    ..It was the purpose of this experiment to test the hypothesis that slow, continuous elongation of a retracted musculotendinous unit allows reversal of the currently irreversible structural muscle changes...
  30. ncbi request reprint Supraspinatus tendon load during abduction is dependent on the size of the critical shoulder angle: A biomechanical analysis
    Christian Gerber
    Department of Orthopaedics, Balgrist University Hospital, Zurich, Switzerland
    J Orthop Res 32:952-7. 2014
    ..In this range, SSP force had to be increased by 13-33% (15-23 N) to stabilize the arm in space. Our results support the concept that a high CSA can induce SSP overload particularly at low degrees of active abduction...
  31. ncbi request reprint Retraction of supraspinatus muscle and tendon as predictors of success of rotator cuff repair
    Dominik C Meyer
    Balgrist University Hospital, Orthopaedic Department, University of Zurich, Zurich, Switzerland
    Am J Sports Med 40:2242-7. 2012
    ..The structural failure rate of rotator cuff repair can exceed 50%. Important predictors for repair failure are preoperative fatty muscle infiltration and myotendinous retraction...
  32. doi request reprint Structure of retracted tendons after staged repair following continuous traction
    Mazda Farshad
    Department of Orthopedics, University of Zurich, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
    Knee Surg Sports Traumatol Arthrosc 19:2131-7. 2011
    ..We quantified changes in chronically retracted tendons undergoing no repair or a staged repair involving an initial re-lengthening of the musculotendinous unit by traction in a sheep model of massive rotator cuff tear...
  33. ncbi request reprint Intermethod agreement and interobserver correlation of radiologic acromiohumeral distance measurements
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 17:237-40. 2008
    ..It is, therefore, possible to use the AHD read on MRI or CT studies for prognostic reasons, provided the values obtained are converted accordingly and remembering that the correlation of the values is only moderate...
  34. ncbi request reprint Teres minor integrity predicts outcome of latissimus dorsi tendon transfer for irreparable rotator cuff tears
    John G Costouros
    University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 16:727-34. 2007
    ..In conclusion, when performing LDTT for massive irreparable posterosuperior rotator cuff tears, fatty infiltration of the teres minor should be considered prior to surgery, as it is predictive of outcome...
  35. doi request reprint Amplitude and strength of muscle contraction are reduced in experimental tears of the rotator cuff
    Dominik C Meyer
    Balgrist University Hospital, University of Zurich, Zurich, Switzerland
    Am J Sports Med 39:1456-61. 2011
    ..Chronic tendon tears lead to retraction, fatty infiltration, and atrophy of the respective muscle. These muscle changes are decision-making criteria in rotator cuff tear management...
  36. doi request reprint Latissimus dorsi transfer to restore external rotation with reverse shoulder arthroplasty: a biomechanical study
    Philippe Favre
    Laboratory for Orthopaedic Research, Department of Orthopaedics, Balgrist, University of Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 17:650-8. 2008
    ..An insertion site on the posterior side of the greater tuberosity (adjacent to the teres minor insertion) produced a greater external rotation moment arm...
  37. doi request reprint Total shoulder arthroplasty with an uncemented soft-metal-backed glenoid component
    Sandro F Fucentese
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 19:624-31. 2010
    ..The purpose of this study was to investigate the clinical and radiographic results associated with use of a novel uncemented soft-metal-backed glenoid component (SMBG), with a minimum follow-up of 2 years...
  38. ncbi request reprint Effect of selective experimental suprascapular nerve block on abduction and external rotation strength of the shoulder
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 16:815-20. 2007
    ..The contribution of the infraspinatus to abduction strength is great. In the acute situation, the teres minor does not contribute more than 20% of external rotation strength at any degree of abduction...
  39. ncbi request reprint A comparative analysis of fatty infiltration and muscle atrophy in patients with chronic rotator cuff tears and suprascapular neuropathy
    Silvan Beeler
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 22:1537-46. 2013
    ..This study compares the different MRI changes that occur in chronic cuff tears and suprascapular neuropathy...
  40. ncbi request reprint Relationship of individual scapular anatomy and degenerative rotator cuff tears
    Beat K Moor
    Department of Orthopaedics, Balgrist University Hospital, Zurich, Switzerland Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, Bern, Switzerland Electronic address
    J Shoulder Elbow Surg 23:536-41. 2014
    ....
  41. ncbi request reprint The biomechanical role of the subscapularis in latissimus dorsi transfer for the treatment of irreparable rotator cuff tears
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Shoulder Elbow Surg 15:736-42. 2006
    ..The inferior functional results of latissimus dorsi transfer in the presence of subscapularis dysfunction are explained by the loss of centering of the humeral head upon abduction and elevation if subscapularis function is deficient...
  42. doi request reprint Outcome of single-tendon rotator cuff repair in patients aged older than 65 years
    Ali Djahangiri
    Department of Orthopedic Surgery, University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 22:45-51. 2013
    ..Furthermore, asymptomatic cuff tearing is frequent in this age group, so the value of tendon repair has been questioned. Our aim was to review the results of cuff repair in these patients and to identify factors predicting outcome...
  43. ncbi request reprint The effect of capsular tightening on humeral head translations
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Orthop Res 22:194-201. 2004
    ..5 mm posteriorly to 2 mm anteriorly and up to 2.2 mm superiorly). Posterior plications had only little effect on translations (mainly a decrease of anterior translation during flexion of 2.8 mm)...
  44. doi request reprint Evolution of nonoperatively treated symptomatic isolated full-thickness supraspinatus tears
    Sandro F Fucentese
    Department of Orthopedics, University Hospital Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 94:801-8. 2012
    ....
  45. ncbi request reprint Asymmetric atrophy of the supraspinatus muscle following tendon tear
    Dominik C Meyer
    Department of Orthopaedics, University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Orthop Res 23:254-8. 2005
    ..Muscular changes are not simply a consequence of muscle disuse, but dependent on architectural changes in the muscle...
  46. ncbi request reprint Association of osteopenia of the humeral head with full-thickness rotator cuff tears
    Dominik C Meyer
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 13:333-7. 2004
    ..For optimal suture fixation to bone, sutures or anchors should be positioned subcortically or medially under the articular surface...
  47. ncbi request reprint Comparison of the subjective shoulder value and the Constant score
    Michael K Gilbart
    Department of Orthopaedic Surgery, University of British Columbia, Vancouver, Zurich, Switzerland
    J Shoulder Elbow Surg 16:717-21. 2007
    ..The SSV is an easily administered, responsive, and valid measure of shoulder function. The SSV may offer an improvement over the CS in assessing shoulder instability patients, as the CS may overestimate the results of these patients...
  48. doi request reprint Reverse total shoulder arthroplasty for massive irreparable rotator cuff tears in patients younger than 65 years old: results after five to fifteen years
    Eugene T H Ek
    Department of Orthopaedic Surgery, University of Zurich, Balgrist University Hospital, Forchstrasse 340, Zurich, Switzerland
    J Shoulder Elbow Surg 22:1199-208. 2013
    ..Our study evaluates the midterm to long-term results of RTSA for patients aged younger than 65 years with pseudoparalysis secondary to massive irreparable rotator cuff tears, with or without arthritis...
  49. doi request reprint Latissimus dorsi tendon transfer for treatment of irreparable posterosuperior rotator cuff tears: long-term results at a minimum follow-up of ten years
    Christian Gerber
    Department of Orthopaedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland E mail address for B K Moor
    J Bone Joint Surg Am 95:1920-6. 2013
    ..The purpose of this study was to evaluate the long-term outcome of such transfers for irreparable posterosuperior rotator cuff tears to determine the durability of the results and to identify risk factors for an unfavorable outcome...
  50. doi request reprint Accurate coracoid graft placement through use of a drill guide for the Latarjet procedure
    Dominik C Meyer
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Forchstrasse 340, Zurich, Switzerland
    J Shoulder Elbow Surg 22:701-8. 2013
    ....
  51. ncbi request reprint Effect of experimental suprascapular nerve block on active glenohumeral translations in vivo
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Uniklinik Balgrist, Forchstrasse 340, Zurich 8008, Switzerland
    J Orthop Res 24:491-500. 2006
    ..The hypothesis that static or dynamic superior humeral head displacement is prevented by active-supra- and/or infraspinatus muscle function must therefore be rejected, for the shoulder with a structurally intact muscle-tendon-bone unit...
  52. doi request reprint Controlled laboratory testing of arthroscopic shaver systems: do blades, contact pressure, and speed influence their performance?
    Karl Wieser
    Orthopaedic Department, University of Zurich, Balgrist Hospital, Zurich, Switzerland
    Arthroscopy 28:1497-503. 2012
    ....
  53. doi request reprint Exogenous collagen cross-linking recovers tendon functional integrity in an experimental model of partial tear
    Gion Fessel
    Department of Orthopedics, University Hospital Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Orthop Res 30:973-81. 2012
    ..We conclude that genipin cross-linking of injured tendons holds potential for arresting tendon tear progression, and that implications of the treatment on matrix remodeling in living tendons should now be investigated...
  54. doi request reprint Subacromial pressures vary with simulated sleep positions
    Clement M L Werner
    Department of Surgery, Division of Trauma Surgery, University Hospital Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 19:989-93. 2010
    ..Consequently, atrophy and rupture can affect tendon healing after rotator cuff repair, thus potentially discrediting the outcome of surgery...
  55. doi request reprint Adipogenic and myogenic gene expression in rotator cuff muscle of the sheep after tendon tear
    Eric Frey
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Orthop Res 27:504-9. 2009
    ..The results point to a crucial role of the transcription factors PPARgamma, C/EBPbeta, and Myf-5 in impairment and regeneration of rotator cuff muscles after tendon tears in sheep...
  56. pmc Reverse total shoulder arthroplasty-from the most to the least common complication
    Mazda Farshad
    Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Switzerland
    Int Orthop 34:1075-82. 2010
    ..Their incidence and the results of their treatment are inconsistently reported. To document and then prevent complications, a standardised monitoring tool including clear definitions and assessment instructions appears necessary...
  57. doi request reprint Influence of psychomotor skills and innervation patterns on results of latissimus dorsi tendon transfer for irreparable rotator cuff tears
    Clement M L Werner
    Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
    J Shoulder Elbow Surg 17:22S-28S. 2008
    ..Psychomotor skills testing appears to be a new, potential method by which to predict the outcome of latissimus dorsi transfer...
  58. ncbi request reprint Frozen shoulder: MR arthrographic findings
    Bernard Mengiardi
    Department of Radiology, Orthopedic University Clinic Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    Radiology 233:486-92. 2004
    ..To evaluate the magnetic resonance (MR) arthrographic findings in patients with frozen shoulder...
  59. ncbi request reprint Mechanical and handling properties of braided polyblend polyethylene sutures in comparison to braided polyester and monofilament polydioxanone sutures
    Daniel M Wüst
    Department of Orthopedics, University of Zurich, Balgrist, Zurich, Switzerland
    Arthroscopy 22:1146-53. 2006
    ..This study was designed to comprehensively compare the mechanical properties of 4 types of braided polyblend sutures with widely used braided polyester and monofilament polydioxanone sutures...
  60. ncbi request reprint Measurement of glenoid version: conventional radiographs versus computed tomography scans
    Richard W Nyffeler
    Department of Orthopaedic Surgery, University of Zurich, Switzerland
    J Shoulder Elbow Surg 12:493-6. 2003
    ..Studies that assess the role of glenoid component orientation should use a reproducible method of assessment such as CT...
  61. ncbi request reprint Mechanical testing of absorbable suture anchors
    Dominik C Meyer
    Department of Orthopaedics, Balgrist, University of Zurich Zurich, Switzerland
    Arthroscopy 19:188-93. 2003
    ..The weakest link in the fixation of soft tissue to bone may therefore be the anchor itself. In this study, several commercially available anchors were mechanically tested in vitro. Type of study: Biomechanical bench study...
  62. ncbi request reprint Subacromial pressures in vivo and effects of selective experimental suprascapular nerve block
    Clement M L Werner
    Department of Orthorpaedics, University of Zurich, Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 15:319-23. 2006
    ..High subacromial pressures can be prevented by avoiding active abduction, flexion, and internal rotation of the arm. External rotation does not need to be limited to reduce subacromial pressure...
  63. doi request reprint Does subacromial injection of a local anesthetic influence strength in healthy shoulders?: a double-blinded, placebo-controlled study
    Mazda Farshad
    Department of Orthopedic Surgery, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 94:1751-5. 2012
    ..We hypothesized that subacromial injection of a local anesthetic could decrease shoulder abduction and/or external rotation strength, resulting in physical examination findings that could mislead the clinician...
  64. ncbi request reprint Assessment of fat content in supraspinatus muscle with proton MR spectroscopy in asymptomatic volunteers and patients with supraspinatus tendon lesions
    Christian W A Pfirrmann
    Department of Radiology, University Hospital, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    Radiology 232:709-15. 2004
    ..To evaluate proton magnetic resonance (MR) spectroscopy in the assessment of lipid content of the supraspinatus muscle in asymptomatic volunteers and patients with supraspinatus tendon lesions...
  65. ncbi request reprint Mechanical strength of arthroscopic rotator cuff repair techniques: an in vitro study
    Alberto G Schneeberger
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Zurich, Switzerland
    J Bone Joint Surg Am 84:2152-60. 2002
    ..The goal of this study was to analyze the mechanical properties following arthroscopic techniques for rotator cuff repair and to evaluate possible alternative techniques...
  66. doi request reprint Helical cutting as a new method for tendon-lengthening in continuity
    Mazda Farshad
    Department of Orthopaedics, University Hospital Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 93:733-8. 2011
    ..The purpose of this study was to develop a new method to increase the potential range of attainable tendon length while preserving a degree of tendon continuity...
  67. ncbi request reprint Association of a large lateral extension of the acromion with rotator cuff tears
    Richard W Nyffeler
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Switzerland
    J Bone Joint Surg Am 88:800-5. 2006
    ..The purpose of this study was to quantify the lateral extension of the acromion in patients with a full-thickness rotator cuff tear and in patients with an intact rotator cuff...
  68. doi request reprint Correlation of psychomotor findings and the outcome of a physical therapy program to treat scapular dyskinesis
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Uniklinik Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 20:69-72. 2011
    ..This pilot study was performed to investigate the influence of psychomotor skills on the outcome of a specific nonoperative program (scapular dyskinesis-program) to treat scapular dyskinesis...
  69. doi request reprint Automated muscle wrapping using finite element contact detection
    Philippe Favre
    Laboratory for Orthopaedic Research, Department of Orthopaedics, Balgrist, University of Zurich, Switzerland
    J Biomech 43:1931-40. 2010
    ..These advantages may be valuable for both general and subject-specific musculoskeletal modeling...
  70. doi request reprint The clinical and structural long-term results of open repair of massive tears of the rotator cuff
    Matthias A Zumstein
    Department of Orthopedics, University of Zurich, Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 90:2423-31. 2008
    ..The purpose of this study was to reassess the same patients to determine the long-term functional and structural results...
  71. doi request reprint Non-purulent low-grade infection as cause of pain following shoulder surgery: preliminary results
    Alberto G Schneeberger
    Shoulder and Elbow Surgery, Seefeldstr 27, 8008, Zurich, Switzerland
    Chir Organi Mov 93:S71-7. 2009
    ..Low-grade infection of the shoulder can be a cause of persistent pain and stiffness. The results of antibiotic treatment are disappointing. Further studies are necessary to analyse this difficult pathology...
  72. doi request reprint A computerized analysis-by-synthesis algorithm improves precision of linear wear measurements in total hip replacements
    Claudio Dora
    Department of Orthopedics, University of Zurich, Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Orthop Res 26:1121-6. 2008
    ..84 mm). Due to the availability of the full CAD data of the implant and to further automation of the measuring process, the newly proposed method provided improved precision in measuring polyethylene wear...
  73. ncbi request reprint Influence of component positioning on impingement in conventional total shoulder arthroplasty
    Philippe Favre
    Laboratory for Orthopaedic Research, Department of Orthopaedics, Balgrist, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    Clin Biomech (Bristol, Avon) 23:175-83. 2008
    ..This study tests the hypothesis that certain implant component positioning configurations may lead to impingement within the physiological range of motion...
  74. pmc Reconstruction versus conservative treatment after rupture of the anterior cruciate ligament: cost effectiveness analysis
    Mazda Farshad
    Department of Orthopedic Surgery, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    BMC Health Serv Res 11:317. 2011
    ..A critical evaluation of benefits and expenditures of both treatment options as in a cost effectiveness analysis seems well-suited to provide valuable information for treating physicians and healthcare policymakers...
  75. ncbi request reprint Suprascapular nerve palsy after the Latarjet procedure
    Gerardo J Maquieira
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Switzerland
    J Shoulder Elbow Surg 16:e13-5. 2007
  76. ncbi request reprint A pathomechanical concept explains muscle loss and fatty muscular changes following surgical tendon release
    Dominik C Meyer
    Department of Orthopaedic Surgery, University of Zurich, Balgrist, Forchstr 340, 8008 Zurich, Switzerland
    J Orthop Res 22:1004-7. 2004
    ..Fatty infiltration is therefore not seen as a degenerative process but a necessary rearrangement of the tissue after macroarchitectural changes caused by musculo-tendinous retraction...
  77. ncbi request reprint Influence of test temperature and test speed on the mechanical strength of absorbable suture anchors
    Dominik Christoph Meyer
    Department of Orthopaedics, University of Zurich, Zurich, Switzerland
    Arthroscopy 20:185-90. 2004
    ..In this study, the difference in mechanical performance at room and body temperature was assessed in vitro at different test speeds...
  78. ncbi request reprint Reverse total shoulder arthroplasty
    Christian Gerber
    Department of Orthopaedic Surgery, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
    J Am Acad Orthop Surg 17:284-95. 2009
    ..Radiographic and clinical results appear to deteriorate over time. Proper patient selection and attention to technical details are needed to reduce the currently high complication rate...
  79. ncbi request reprint Osteochondral glenoid allograft for biologic resurfacing of the glenoid: biomechanical comparison of novel design concepts
    Christian Gerber
    Department of Orthopaedics, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
    J Shoulder Elbow Surg 20:909-16. 2011
    ..We hypothesised that a new concept for a press-fit osteochondral allograft glenoid replacement would restore the anatomic geometry of the glenoid, with primary stability guaranteed by the construct through press-fit fixation alone...
  80. doi request reprint Arthroscopic knot tying on a single suture limb in case of a torn suture
    Dominik C Meyer
    Department of Orthopedic Surgery, University of Zurich, Balgrist, Zurich, Switzerland
    Arthroscopy 25:925-8. 2009
    ..We present a tool and method that allow completion of the knot on a single suture limb. Alternatively, the method can be used to perform all-inside endoscopic or arthroscopic knot tying without removal of the instrument from the body...
  81. ncbi request reprint Predictors of scapular notching in patients managed with the Delta III reverse total shoulder replacement
    Ryan W Simovitch
    Department of Orthopaedics, University of Zurich, Uniklinik Balgrist, Forchstrasse 340, 8008 Zurich, Switzerland
    J Bone Joint Surg Am 89:588-600. 2007
    ..The purpose of the present study was to evaluate the clinical relevance of notching and to determine the anatomic and radiographic parameters that predispose to its occurrence...
  82. pmc Determining utility values in patients with anterior cruciate ligament tears using clinical scoring systems
    Mazda Farshad
    Balgrist University Hospital, Orthopedic Surgery, University of Zurich, Switzerland
    BMC Health Serv Res 11:182. 2011
    ..These values will be used for the interpretation and comparison of outcome results in the currently available literature for different treatment options...
  83. doi request reprint Measurements of shoulder mobility by patient and surgeon correlate poorly: a prospective study
    Hannes A Rudiger
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Shoulder Elbow Surg 17:255-60. 2008
    ..Combining surgeon and patient based information in the same study is inappropriate. Comparisons and meta-analysis of shoulder studies need to take the type of data acquisition into account...
  84. ncbi request reprint The Constant score in normal shoulders
    Edward H Yian
    Department of Orthopaedics, University of Zurich Balgrist, Zurich, Switzerland
    J Shoulder Elbow Surg 14:128-33. 2005
    ..If relative Constant scores are used, absolute scores should be concurrently reported to allow comparisons with different populations...
  85. ncbi request reprint Functional analysis of shoulder arthrodesis
    Ladislav Nagy
    Department of Orthopaedics, University of Zurich, Switzerland
    J Shoulder Elbow Surg 13:386-95. 2004
    ..This corresponds to CT-measured angles of 15 degrees to 30 degrees for flexion, 55 degrees to 65 degrees for abduction, and 0 degrees of internal rotation (humeral epicondylar axis to scapular plane)...
  86. ncbi request reprint Combined intra- and extra-articular arthroscopic treatment of entrapment neuropathy of the infraspinatus branches of the suprascapular nerve caused by a periglenoidal ganglion cyst
    Clement M L Werner
    Department of Orthopaedics, University of Zurich, Balgrist, Zurich, Switzerland
    Arthroscopy 23:328.e1-3. 2007
    ..The technique described combines the advantages of open and arthroscopic surgery, allowing one to address the underlying intra-articular pathology, completely evacuate the ganglion cyst, and protect the suprascapular nerve...
  87. ncbi request reprint Outcome of pectoralis major transfer for the treatment of irreparable subscapularis tears
    Bernhard Jost
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Bone Joint Surg Am 85:1944-51. 2003
    ..If conservative treatment fails and repair of the musculotendinous unit is impossible, transfer of the pectoralis major tendon can be attempted to substitute for lost subscapularis function...
  88. ncbi request reprint Clinical and structural results of open repair of an isolated one-tendon tear of the rotator cuff
    Bruno Fuchs
    Department of Orthopaedics, University of Zurich, Uniklinik Balgrist, Forchstrasse 340, Ch 8008 Zurich, Switzerland
    J Bone Joint Surg Am 88:309-16. 2006
    ..We assessed the structural changes in the musculotendinous units after open rotator cuff repair and correlated these findings with the clinical outcome to establish a benchmark for future series...
  89. doi request reprint Numerical modelling of the shoulder for clinical applications
    Philippe Favre
    Laboratory for Orthopaedic Research, Department of Orthopaedics, Balgrist, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland
    Philos Trans A Math Phys Eng Sci 367:2095-118. 2009
    ..Finally, the necessary benchmarks for validating shoulder models, the emerging technologies that will enable further advances and the future challenges in the field are described...
  90. ncbi request reprint Shoulder instability related to epileptic seizures
    Martin Bühler
    Department of Orthopaedics, University of Zurich, Balgrist, Switzerland
    J Shoulder Elbow Surg 11:339-44. 2002
    ..Large bony lesions were the hallmark finding in this group of patients. Skeletal reconstruction was necessary to obtain clinical stability, especially in the more difficult-to-treat anterior instability...
  91. ncbi request reprint Evaluation of complex joint motion with computer-based analysis of fluoroscopic sequences
    Christian W A Pfirrmann
    Department of Radiology, Orthopedic University Hospital Balgrist, Zurich, Switzerland
    Invest Radiol 37:73-6. 2002
    ..To develop a computer-assisted analysis of complex joint motion based on standard fluoroscopic sequences...
  92. ncbi request reprint Failure of suture material at suture anchor eyelets
    Dominik C Meyer
    Department of Orthopaedics, University of Zurich, Zurich, Switzerland
    Arthroscopy 18:1013-9. 2002
    ..In the repair of soft tissue to bone using suture anchors, failure of the suture material can occur at the anchor eyelet. This study examines the load strength at which suture material fails with different metallic suture anchor eyelets...
  93. ncbi request reprint Severe airway obstruction during arthroscopic shoulder surgery
    Stephan Blumenthal
    Department of Anesthesiology, Orthopedic University Clinic Balgrist, Zurich, Switzerland
    Anesthesiology 99:1455-6. 2003
  94. ncbi request reprint The reverse total shoulder arthroplasty
    Frederick A Matsen Iii
    Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
    Instr Course Lect 57:167-74. 2008
    ..An understanding of the mechanics of the reverse total shoulder arthroplasty and the technical details of its implantation will help in understanding its role in shoulder reconstruction...
  95. ncbi request reprint Impact of fatty infiltration of the teres minor muscle on the outcome of reverse total shoulder arthroplasty
    Ryan W Simovitch
    Palm Beach Orthopaedic Institute, 3401 PGA Boulevard, Suite 500, Palm Beach Gardens, FL 33401, USA
    J Bone Joint Surg Am 89:934-9. 2007
    ..It was therefore the purpose of this study to evaluate the influence of fatty infiltration of the teres minor muscle on the clinical outcome after reverse total shoulder replacement...
  96. ncbi request reprint The effect of cementing technique on structural fixation of pegged glenoid components in total shoulder arthroplasty
    Richard W Nyffeler
    Orthopaedic Hospital, University of Lausanne, Avenue Pierre Decker 4, CH 1005 Lausanne, Switzerland
    J Shoulder Elbow Surg 15:106-11. 2006
    ....
  97. ncbi request reprint Biomechanical relevance of glenoid component positioning in the reverse Delta III total shoulder prosthesis
    Richard W Nyffeler
    Orthopaedic Hospital, University of Lausanne, Lausanne, Switzerland
    J Shoulder Elbow Surg 14:524-8. 2005
    ..Placing the glenosphere distally (test configuration C) significantly improved adduction and abduction angles compared with all other test configurations (P < .001)...
  98. doi request reprint A review of the Constant score: modifications and guidelines for its use
    Christopher R Constant
    Research and Development Committee, Société Européenne pour la Chiurgie de l Epaule et du Coude, Saint Genis Laval, France
    J Shoulder Elbow Surg 17:355-61. 2008
  99. ncbi request reprint Glenoid version and rotator cuff tears
    Patrice Tetreault
    Hopital Notre Dame, University of Montreal, Montreal, Canada H2L 4M1
    J Orthop Res 22:202-7. 2004
    ..Greater retroversion is predictive of an anterior cuff injury and greater anteversion is predictive of a posterior cuff injury...
  100. ncbi request reprint Measuring orthopedic implant wear on standard radiographs with a precision in the 10 microm-range
    Kathrin Burckhardt
    Computer Vision Laboratory, Swiss Federal Institute of Technology, ETH Zentrum, Sternwartstrasse 7, CH 8092 Zurich, Switzerland
    Med Image Anal 10:520-9. 2006
    ..The precision was assessed using dual radiographs of 20 patients with total hip replacement. A standard deviation of 49 microm was found...
  101. ncbi request reprint Submillimeter measurement of cup migration in clinical standard radiographs
    Kathrin Burckhardt
    Computer Vision Laboratory, Swiss Federal Institute of Technology ETH, Gloriastr 35, 8092 Zurich, Switzerland
    IEEE Trans Med Imaging 24:676-88. 2005
    ..The implantation of a bony marker was found to increase the precision to a standard deviation of 0.20 mm. The interobserver variability in the two cases was estimated to be 0.11 mm and 0.04 mm...