Document Detail

Anatomical considerations regarding the "bare spot" of the glenoid cavity.
MedLine Citation:
PMID:  14872284     Owner:  NLM     Status:  MEDLINE    
The "bare spot" of the glenoid cavity has recently been described as a constant reference point to quantify the amount of bone loss from the inferior portion of the glenoid cavity. In shoulder surgery this spot should help the surgeon to determine the width of the inferior portion of the glenoid cavity arthroscopically. The aim of this study was to determine the localization of the bare spot within the glenoid cavity and to prove its usefulness in shoulder surgery by means of a macroscopic study using embalmed glenohumeral joints ( n=20; 12 left, 8 right). Each glenoid cavity was photographed and transferred to a commercial AutoCAD software program. The bare spot was marked and the mean distances between the center of the bare spot and the inferior ( a), anterior ( b(1)) and posterior ( b(2)) inner margins of the glenoid labrum as well as its relationship ( c) to the mid-point of a virtual circle formed by the inferior portion of the glenoid cavity were measured (mean values : a=9.70, b(1)=10.88, b(2)=13.71, c=3.2 mm). In most cases, the bare spot showed a significantly excentric position within the inferior part of the glenoid cavity ( p<0.05). Due to the great variability in the shape of the glenoid cavity, an inferior circle according to previous descriptions could only be observed in half the specimens. From the results of our study the bare spot seems to be an unreliable landmark for the determination of the center of the inferior portion of the glenoid cavity, although it has a constant appearance and is probably expressed as the result of cartilaginous distribution due to dynamic shoulder activity.
F Aigner; S Longato; H Fritsch; F Kralinger
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Publication Detail:
Type:  Journal Article     Date:  2004-02-11
Journal Detail:
Title:  Surgical and radiologic anatomy : SRA     Volume:  26     ISSN:  0930-1038     ISO Abbreviation:  Surg Radiol Anat     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-08-04     Completed Date:  2005-01-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8608029     Medline TA:  Surg Radiol Anat     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  308-11     Citation Subset:  IM    
Institute of Anatomy, Histology and Embryology, Department of Clinical and Functional Anatomy, Medical University Innsbruck, Muellerstrasse 59, 6010, Innsbruck, Austria.
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MeSH Terms
Scapula / anatomy & histology*
Shoulder Joint / anatomy & histology*

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