Document Detail

Effect of baseplate size on primary glenoid stability and impingement-free range of motion in reverse shoulder arthroplasty.
MedLine Citation:
PMID:  25488492     Owner:  NLM     Status:  Publisher    
BACKGROUND: Use of a baseplate with a smaller diameter in reverse shoulder arthroplasty is increasing, especially in patients with a small glenoid or glenoid wear. However, the effect of a smaller baseplate on stability of the glenoid component has not been evaluated. Thus, the purpose of this study was to determine whether a smaller baseplate (25 mm) is beneficial to the initial stability of the glenoid component compared to that with a baseplate of a commonly used size (29 mm).
METHODS: Micromotion of glenoid components attached to 14 scapulae of fresh-frozen cadavers was measured and compared between 25- and 29-mm baseplates in biomechanical testing. Impingement-free range of motion in abduction, adduction, internal rotation, and external rotation was evaluated by using a simulated computer model constructed based on the same fresh-frozen cadavers used in biomechanical testing.
RESULTS: Micromotion at the inferior third of the glenoid-glenosphere interface was higher in the 29-mm baseplate group than in the 25-mm baseplate group during both 0.7- and 1-body weight cyclic loading in biomechanical testing. Adduction deficit was smaller, and total impingement-free range of motion from abduction to adduction and rotation were greater in the 25-mm baseplate group than in the 29-mm baseplate group in the simulated computer model.
CONCLUSIONS: Use of a baseplate with a smaller diameter (25 mm) in reverse shoulder arthroplasty is suitable for improving the primary stability of the glenoid component. With a smaller baseplate, impingement-free range of motion is optimized in a smaller glenoid.
Soo-Won Chae; Soung-Yon Kim; Haea Lee; Joung-Ro Yon; Juneyoung Lee; Seung-Ho Han
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-9
Journal Detail:
Title:  BMC musculoskeletal disorders     Volume:  15     ISSN:  1471-2474     ISO Abbreviation:  BMC Musculoskelet Disord     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-9     Completed Date:  -     Revised Date:  2014-12-10    
Medline Journal Info:
Nlm Unique ID:  100968565     Medline TA:  BMC Musculoskelet Disord     Country:  -    
Other Details:
Languages:  ENG     Pagination:  417     Citation Subset:  -    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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