Document Detail

Initial stability of tibial components in primary knee arthroplasty. A cadaver study comparing cemented and cementless fixation techniques.
MedLine Citation:
PMID:  21845999     Owner:  NLM     Status:  In-Process    
The purpose of this roentgen stereophotogrammetric analysis (RSA) study was to evaluate the initial stability of cemented and cementless tibial components in vitro. Twenty tibia specimens were matched into two groups. In the first group, the tibial trays were cemented superficially and in the second group cementless fixation with stem and screws was performed. An axial load of 2000 N for 1000 and 10,000 cycles was applied onto the specimens and RSA was performed. The experimental results after 1000 cycles showed a higher migration with significant differences for the parameters maximum lift off (p = 0.011) and maximum total point motion (p = 0.002) in the cementless group. After 10,000 cycles, the migration in the cementless group increased significantly for maximum lift off (p = 0.043), maximum subsidence (p = 0.045) and maximum total point motion (p = 0.013). The higher migration rates in the cementless group demonstrate a lower initial mechanical stability of cementless tibial components which can cause an early component loosening.
Turgay Efe; Jens Figiel; Susanna Danek; Carsten O Tibesku; Jürgen R J Paletta; Adrian Skwara
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta orthopaedica Belgica     Volume:  77     ISSN:  0001-6462     ISO Abbreviation:  Acta Orthop Belg     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-08-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985165R     Medline TA:  Acta Orthop Belg     Country:  Belgium    
Other Details:
Languages:  eng     Pagination:  320-8     Citation Subset:  IM    
Department of Orthopaedic Surgery and Rheumatology, University Hospital Marburg, Germany.
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