View Full Version : Rotator cuff responses

John C. Laughlin
12-10-1997, 02:45 AM
Thanks to all who responded. The replies were very helpful. Here is a
posting of the responses for all who wanted them.

It's a good list, I recommend saving it!



There are very few studies detailing the mechanical properties of the
rotator cuff. A couple of studies have looked at the supraspinatus
tendon, but that's about it.

Nakajima et al: Histologic and biomechanical characteristics of the
supraspinatus tendon: reference to rotator cuff tearing. Journal of
Shoulder and Elbow Surgery, 3:79-87, 1994.

Itoi et al: Tensile properties of the supraspinatus tendon. Journal of
Orthopaedic Research, 13:578-584, 1995.

Hope this helps,

Michael J. Bey
Orthopaedic Research Laboratory
University of Michigan
G-161 N. Ingalls
Ann Arbor, MI 48106
(313) 647-1549
__________________________________________________ _

It is known that the supraspinatus tendon transmits 300N of force
when the arm is 30 degrees abducted (Wallace 1984, proceeding of the
Orthopaedic Research Society) and this tends to be the strength that
implant manufacturers aim for with new anchors for cuff repair.

Paul Manning
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
Paul Manning FRCS
EMail P.Manning@nottingham.ac.uk
Tel.Office: +44 115 9513277
Fax: +44 115 9513278
Home: +44 115 9415607
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~

i dont know how detailed you information needs to be, but i know the
book "the
athletes shoulder" is an excellent book. I hope that i have been

__________________________________________________ ______

Try Nordin and Frankle (not sure about the Frankle spelling) -
biomechanics. They have good summaries of literature for major joints,
well as the components (bone, tendon, muscle, cartlidge) and its in
easy to read format. If you are interested, I can give you exact
title etc. but I don't have it here at work.

Bryan Kirking - Research Engineer
Institute for Spinal Disorders
Baylor College of Medicine
__________________________________________________ _____


You might try a search of the Journal of Shoulder and Elbow Surgery.
You might also send an email request to Thay Lee at University of
California Irvine (director of Biomechanics Research) who I believe has
done research on the rotator cuff. I would be interested in receiving
the response you get to this inquiry.

John Brault, MS
Biomechanics Research & Consulting, Inc.
840 Apollo St.
Suite 218
El Segundo, CA 90245

Phone: 310.615.3112
Fax: 310.615.3038
email: john@brcinc.com

__________________________________________________ ______

Hi John,

You might want to try the Journal of Biomechanics Vol. 20, #2: 119-134
157-166; 1987

These papers are:

1)On the biomechanics of human shoulder complex... Peindl and Engin

2)Biomechanical model of the human shoulder-elements...Hogfors et al.

Hope they help, I amy have more if you need EMG related or strength

Daniel Benoit
Bentek Movement Research
Hamilton, Ontario
__________________________________________________ ____

I have done some research into the physiological aspects of rotator cuff
injuries. I would look at any work done by ASMI (American Sports
Institute), Jim Andrews, or Kevin Wilk. If there isn't any information
within the articles, the citations at the end should provide some good
references. If you would like, I can do some digging on my own.

Good Luck,

Phil Kujawa, ATC
__________________________________________________ ____

These might be useful for you--please post a summary.

Bassett,RW, Browne,AO, Morrey,BF, An,KN Glenohumeral muscle force
and moment
mechanics in position of shoulder instability J Biomech 23 5
405-415 1990

Bechtol,CO Biomechanics of the shoulder Clin Orthop 146 37-41

Bigliani,LU, Kelkar,R, Flatow,EL, Pollock,RG, Mow,VC Glenohumeral
stability Am J Sports Med 330 13-30 1996

Engin,AE On the biomechanics of the shoulder complex J Biomech 13
590 1979

Hart,DL, Carmichael,SW Biomechanics of the shoulder JOSPT 6 4

Hughes,RE, An,KN Force analysis of rotator cuff muscles Clin Orthop
75-83 1996

Neagle,CE, Bennett,JB Subracromial anatomy and biomechanics related to
impingement syndrome Operative Techniques in Sports Medicine 2 2

Pratt,NE Anatomy and biomechanics of the shoulder J Hand Therapy

65-76 1994

Speer,KP Anatomy and pathomechanics of shoulder instability
Techniques in Sports Medicine 1 4 252-255 1993

Wood JE, Meek SG, Jacobson SG Quantitation of human shoulder anatomy
prosthetic arm control--II. Anatomy matrices J Biomech 22 4
309-325 1989

Wood JE, Meek SG, Jacobson SG Quantitation of human shoulder anatomy
prosthetic arm control--I. Surface modelling J Biomech 22 3
273-292 1989

Wuelker N, Wirth CJ, Plitz W, Roetman B A dynamic shoulder model:
testing and muscle force study J Biomech 28 5 489-499 1995

Burkhart SS, Nottage WM, Ogilvie-Harris DJ, Kohn HS, Pachelli A Partial
of irreparable rotator cuff tears Arthroscopy 10 4 363-370 1994

__________________________________________________ ______


John Brault of our office was the Director of the Biomechanics Lab at
the Kerlan/Jobe Orthopedic Clinic at Centinela Hospital. He has
extensive research experience with the rotator cuff including fine wire
EMG of the cuff muscles and shoulder complex during various activities.
We have addressed rotator cuff injury mechanics in numerous forensic
cases (automobile, sport/recreation, slip/fall). In 1996 we conducted
low-speed rear-end collisions with live human subjects (see Stapp '97
for kinematic results and Archives of Physical Medicine and
Rehabilitation, January '98 for clinical results). At first one would
not think rear-end collisions would present the proper injury
mechanism. However, we have been looking at the torso forward rebound
velocity (measured in our tests) as a potential contributor to rotator
cuff injury causation in certain at-risk individuals in certain
pre-impact postures. It is an interesting topic.

Jeffrey B. Wheeler, M.S.
Biomechanics Research & Consulting, Inc.
Offices in Los Angeles and Denver
LA ph(310) 615-3112 fax(310) 615-3038
Denver ph(303) 670-2111 fax(303) 670-2444
email jeff@brcinc.com
website http://www.brcinc.com

Thanks again!

John C. Laughlin M.Eng.
Rimkus Consulting Group, Inc.
Forensic Department
Eight Greenway Plaza, Suite 500
Houston, Texas 77046

Voice: (713) 621-3550
Fax: (713) 623-4357
Email: jcl@rimkus.com