Journal article
Association of Third Body Embedment with Rim Damage in Retrieved Acetabular Liners
Clinical orthopaedics and related research, Vol.465(465), pp.133-139
12/01/2007
DOI: 10.1097/BLO.0b013e31815c5a7b
PMID: 18090471
Abstract
Third-body effects are a major cause of the substantial variability of wear in total hip replacements. One potential mechanism by which third-body debris can access wear-critical central regions of closely conforming metal-on-polyethylene bearing couples is by fluid convection during incidents of subluxation accompanying neck-on-liner impingement. To provide evidence for this premise, we determined the association of severity of liner rim indentation damage (indicative of impingement frequency/vigor) and the presence of embedded third-body debris in 194 implants retrieved at revision. Rim damage was graded using the five-point Hospital for Special Surgery scale. Particle embedment was assessed both manually and by means of an image analysis computer program that detected the composition, size, and location of each particle. Sixty-eight percent of the cups showed rim indentation damage. We found an association between severity of rim damage and presence of embedded debris. There was substantial nonuniformity of the spatial distribution of the embedded debris, with the predominance of embedded debris at intermediate latitudes. These findings support the premise of convection of debris-laden joint fluid during lever-out subluxation as a mechanism for wear-consequential third-body particles to gain access to highly loaded regions of the bearing surface, thus potentiating increased wear.
Details
- Title: Subtitle
- Association of Third Body Embedment with Rim Damage in Retrieved Acetabular Liners
- Creators
- Hannah J Lundberg - University of IowaSteve S Liu - University of IowaJohn J Callaghan - University of IowaDouglas R Pedersen - University of IowaMichael R O'ROURKE - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, IA, United StatesDevon D Goetz - Iowa Orthopaedic CenterDavid A Vittetoe - Iowa Orthopaedic CenterJohn C Clohisy - Washington University in St. LouisThomas D Brown - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Clinical orthopaedics and related research, Vol.465(465), pp.133-139
- Publisher
- Springer
- DOI
- 10.1097/BLO.0b013e31815c5a7b
- PMID
- 18090471
- ISSN
- 0009-921X
- eISSN
- 1528-1132
- Language
- English
- Date published
- 12/01/2007
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation
- Record Identifier
- 9984622753402771
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