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The effects of blood and fat on Morse taper disassembly forces
Carlos J Lavernia1, Luis Baerga, Robert L Barrack
1Orthopaedic Institute at Mercy Hospital, Miami, Florida 33133, USA. clavernia@mercymiami.org
Abstract:
Biological debris between modular components using Morse tapers in hip arthroplasty can lead to weakening of the implant construct. We conducted a study to determine the effect of blood and fat within the taper interface. Tapers were divided into groups 1 (clean), 2 (surface covered with blood and fat), and 3 (blood and fat wiped off). Each taper was impacted and disassembled 5 times. There was a difference in mean disassembly force between pulls within group 2. Thus, blood and fat contamination can have a significant effect on the potential for disassembly.
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