TY - JOUR
T1 - The 2009 frank stinchfield award
T2 - "hip squeaking": A biomechanical study of ceramic-on-ceramic bearing surfaces
AU - Chevillotte, Christophe
AU - Trousdale, Robert T.
AU - Chen, Qingshan
AU - Guyen, Olivier
AU - An, Kai Nan
PY - 2010/2
Y1 - 2010/2
N2 - We designed and implemented an in vitro bench test to simulate and identify potential biomechanical causes for hip squeaking with alumina ceramic-on-ceramic bearing surfaces. All bearings were third-generation alumina ceramic with a 32-mm head coupled with a 56-mm acetabular component with a 32-mm ceramic insert. Conditions for testing were normal gait, high load, stripe wear, stripe wear in extreme load, metal transfer, edge wear with extreme load, and microfracture. Each condition was tested two times in dry conditions and two times in a lubricated condition with 25% bovine serum. Squeaking was reproduced in all dry conditions. It occurred quickly with high load, stripe wear, or metal transfer. Once squeaking occurred, it did not stop. Squeaking disappeared for all conditions when a small amount of lubricant was introduced. In lubricated conditions, squeaking was only reproduced for the material transfer condition. Our observations suggest squeaking is a problem of ceramic-ceramic lubrication and that this noise occurs when the film fluid between two surfaces is disrupted. Material (metal) transfer was the only condition that led to squeaking in a lubricated situation.
AB - We designed and implemented an in vitro bench test to simulate and identify potential biomechanical causes for hip squeaking with alumina ceramic-on-ceramic bearing surfaces. All bearings were third-generation alumina ceramic with a 32-mm head coupled with a 56-mm acetabular component with a 32-mm ceramic insert. Conditions for testing were normal gait, high load, stripe wear, stripe wear in extreme load, metal transfer, edge wear with extreme load, and microfracture. Each condition was tested two times in dry conditions and two times in a lubricated condition with 25% bovine serum. Squeaking was reproduced in all dry conditions. It occurred quickly with high load, stripe wear, or metal transfer. Once squeaking occurred, it did not stop. Squeaking disappeared for all conditions when a small amount of lubricant was introduced. In lubricated conditions, squeaking was only reproduced for the material transfer condition. Our observations suggest squeaking is a problem of ceramic-ceramic lubrication and that this noise occurs when the film fluid between two surfaces is disrupted. Material (metal) transfer was the only condition that led to squeaking in a lubricated situation.
UR - http://www.scopus.com/inward/record.url?scp=76249101648&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=76249101648&partnerID=8YFLogxK
U2 - 10.1007/s11999-009-0911-x
DO - 10.1007/s11999-009-0911-x
M3 - Article
C2 - 19543782
AN - SCOPUS:76249101648
SN - 0009-921X
VL - 468
SP - 345
EP - 350
JO - Clinical orthopaedics and related research
JF - Clinical orthopaedics and related research
IS - 2
ER -