Document Detail

Effect of posterior shoulder tightness on internal impingement in a cadaveric model of throwing.
MedLine Citation:
PMID:  23322267     Owner:  NLM     Status:  Publisher    
PURPOSE: Posterior shoulder tightness is common in throwing athletes, especially those with symptomatic shoulder internal impingement. The role of posteroinferior capsular contracture in the pathoetiologies of throwing-related injuries caused by shoulder internal impingement remains unclear. The purpose of this study was to assess effect of posterior shoulder tightness on internal impingement in a cadaveric model of throwing. METHODS: Seven fresh-frozen cadaveric shoulders were tested with the shoulder abducted to 90° and at maximum external rotation to simulate the late cocking phase of throwing motion. Glenohumeral joint contact pressure and area through internal impingement, humeral head shift, and the maximum humeral rotation angle were measured. Posteroinferior capsular plication was performed to simulate posteroinferior capsular tightness and induce glenohumeral internal rotation deficit. RESULTS: Following generation of simulated posteroinferior capsular tightness with resultant glenohumeral internal rotation deficit, glenohumeral contact pressure was significantly increased (P < 0.05), the impinged area of rotator cuff tendon was significantly decreased (P < 0.05), and the humeral head shifted posteriorly (P < 0.05) during shoulder internal impingement. CONCLUSION: Excessive posteroinferior capsular tightness can cause forceful internal impingement of the shoulder at maximum external rotation position.
Teruhisa Mihata; Jeffrey Gates; Michelle H McGarry; Masashi Neo; Thay Q Lee
Related Documents :
17944677 - Histological and ultrastructural evaluation of bone around bio-oss particles in sinus a...
20440157 - Porcine allograft mandible revitalization using autologous adipose-derived stem cells, ...
22475367 - Minimally-invasive open reduction of intracapsular condylar fractures with preoperative...
19537737 - Nanofiber scaffolds with gradations in mineral content for mimicking the tendon-to-bone...
7802387 - Radiographic geometric variation of equine long bones.
2212917 - Thoracolumbar burst fracture with another spinal fracture.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-16
Journal Detail:
Title:  Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA     Volume:  -     ISSN:  1433-7347     ISO Abbreviation:  Knee Surg Sports Traumatol Arthrosc     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9314730     Medline TA:  Knee Surg Sports Traumatol Arthrosc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Orthopedic Surgery, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka, 569-8686, Japan,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Different pattern in gap balancing between the cruciate-retaining and posterior-stabilized total kne...
Next Document:  Joint line changes and outcomes in constrained versus unconstrained total knee arthroplasty for the ...