TITLE

Humeral Insertion of the Supraspinatus and Infraspinatus

AUTHOR(S)
Mochizuki, Tomoyuki; Sugaya, Hiroyuki; Uomizu, Mari; Maeda, Kazuhiko; Matsuki, Keisuke; Sekiya, Ichiro; Muneta, Takeshi; Akita, Keiichi
PUB. DATE
May 2008
SOURCE
Journal of Bone & Joint Surgery, American Volume;May2008, Vol. 90-A Issue 5, p962
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: It is generally believed that the supraspinatus is the most commonly involved tendon in rotator cuff tears. Clinically, however, atrophy of the infraspinatus muscle is frequently observed in patients with even small to medium-size rotator cuff tears. This fact cannot be fully explained by our current understanding of the anatomical insertions of the supraspinatus and infraspinatus. The purpose of this study was to reinvestigate the humeral insertions of these tendons. Methods: The study included 113 shoulders from sixty-four cadavers. The humeral insertion areas of the supraspinatus and infraspinatus were investigated in ninety-seven specimens. In sixteen specimens, all muscular portions of the supraspinatus and infraspinatus were removed, leaving the tendinous portions intact, in order to define the specific characteristics of the tendinous portion of the muscles. Another twenty-six shoulders were used to obtain precise measurements of the footprints of the supraspinatus and infraspinatus. Results: The supraspinatus had a long tendinous portion in the anterior half of the muscle, which always inserted into the anteriormost area of the highest impression on the greater tuberosity and which inserted into the superiormost area of the lesser tuberosity in 21% of the specimens. The footprint of the supraspinatus was triangular in shape, with an average maximum medial-to-lateral length of 6.9 mm and an average maximum anteroposterior width of 12.6 mm. The infraspinatus had a long tendinous portion in the superior half of the muscle, which curved anteriorly and extended to the anterolateral area of the highest impression of the greater tuberosity. The footprint of the infraspinatus was trapezoidal in shape, with an average maximum medial-to-lateral length of 10.2 mm and an average maximum anteroposterior width of 32.7 mm. Conclusions: The footprint of the supraspinatus on the greater tuberosity is much smaller than previously believed, and this area of the greater tuberosity is actually occupied by a substantial amount of the infraspinatus. Clinical Relevance: The present study suggests that rotator cuff tears that were previously thought to involve only the supraspinatus tendon may in fact have had a substantial infraspinatus component as well.
ACCESSION #
32098314

 

Related Articles

  • Quantification of rotator cuff tear geometry: the repair ratio as a guide for surgical repair in crescent and U-shaped tears. Kandemir, Utku; Allaire, Robert B.; Debski, Richard E.; Lee, Thay Q.; McMahon, Patrick J. // Archives of Orthopaedic & Trauma Surgery;Mar2010, Vol. 130 Issue 3, p369 

    Surgical repair of symptomatic, retracted rotator cuff tears unresponsive to non-operative treatments requires closure of the tear without undue tension and reattaching the torn tendon to its former insertion site. In this study, the length of the torn tendon edge was hypothesized to be longer...

  • Single versus double-row repair of the rotator cuff. Pauly, Stephan; Gerhardt, Christian; Jianhai Chen; Scheibel, Markus // Knee Surgery, Sports Traumatology, Arthroscopy;Dec2010, Vol. 18 Issue 12, p1718 

    Purpose: Several techniques for arthroscopic repair of rotator cuff defects have been introduced over the past years. Besides established techniques such as single-row repairs, new techniques such as double-row reconstructions have gained increasing interest. The present article therefore...

  • Surgical Repair of Chronic Rotator Cuff Tears. Cofield, Robert H.; Parvizi, Javad; Hoffmeyer, Pierre J.; Lanzer, William L.; Ilstrup, Duane M.; Rowland, Charles M. // Journal of Bone & Joint Surgery, American Volume;Jan2001, Vol. 83-A Issue 1, p71 

    Background: Rotator cuff disease or injury is one of the most frequently seen orthopaedic conditions, and surgical repair of rotator cuff tears is a common procedure. A prospective analysis of the operation, with consistent assessment of patient characteristics, variables associated with the...

  • Shoulder hemiarthroplasty for the treatment of three and four part fractures of the proximal humerus using Comprehensive® Fracture stem. Shah, Nasir; Iqbal, Hafiz J.; Brookes-Fazakerley, Steven; Sinopidis, Chris // International Orthopaedics;Jun2011, Vol. 35 Issue 6, p861 

    We looked at the functional outcome of 32 consecutive patients with proximal humeral fractures that required hemiarthroplasty. Functional status was assessed using University of California Los Angeles (UCLA) shoulder end result assessment, simple shoulder test (SST) and American Shoulder and...

  • Arthroscopic double-row cuff repair with suture-bridging: a structural and functional comparison of two techniques. Boyer, P.; Bouthors, C.; Delcourt, T.; Stewart, O.; Hamida, F.; Mylle, G.; Massin, P. // Knee Surgery, Sports Traumatology, Arthroscopy;Feb2015, Vol. 23 Issue 2, p478 

    Purpose: The aim of this study was to compare the functional and structural outcomes of 2 techniques for double-row, suture-bridging cuff repair. Methods: A consecutive series of 73 patients who underwent arthroscopic, double-row, suture-bridge primary rotator cuff repair of full-thickness...

  • Decision-making in massive rotator cuff tear. Thès, André; Hardy, Philippe; Bak, Klaus // Knee Surgery, Sports Traumatology, Arthroscopy;Feb2015, Vol. 23 Issue 2, p449 

    Treatment of massive rotator cuff tears has developed over many years ranging from conservative treatment to open and arthroscopic repair, muscle transfers and reversed arthroplasty. The evolution of more advanced techniques in arthroscopic repair has changed the treatment approach and improved...

  • Partial-thickness articular surface rotator cuff tears in patients over the age of 35: Etiology and intra-articular associations. Modi, Chetan S.; Smith, Christopher D.; Drew, Stephen J. // International Journal of Shoulder Surgery;Jan-Mar2012, Vol. 6 Issue 1, p15 

    Purpose: Partial-thickness articular-sided rotator cuff tears have a multifactorial etiology and are associated with degeneration of the tendon. They are often described as an injury of the young athlete, although they are also found in the older population. The aim of this study was to...

  • Tears at the rotator cuff footprint: Prevalence and imaging characteristics in 305 MR arthrograms of the shoulder. Schaeffeler, Christoph; Mueller, Dirk; Kirchhoff, Chlodwig; Wolf, Petra; Rummeny, Ernst J.; Woertler, Klaus // European Radiology;Jul2011, Vol. 21 Issue 7, p1477 

    Objectives: To evaluate the prevalence, imaging characteristics and anatomical distribution of tears at the rotator cuff (RC) footprint with MR arthrography (MR-A) of the shoulder. Methods: MR arthrograms obtained in 305 patients were retrospectively reviewed. Partial articular-sided...

  • KFx brings new approach to rotator cuff repair market. YOFFEE, LYNN // Medical Device Daily;3/9/2009, Vol. 13 Issue 44, p1 

    The article focuses on the PASTAFx Anchor System launched by Carlsbad, California-based KFx Medical. The device is designed to repair partial articular sided tendon avulsion tear, avoiding the need to fully tear the tendon first. KFx chairman Tate Scott explains that the device enables surgeons...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics