Back to Search
Start Over
Determination of Reference Geometry for Polyethylene Tibial Insert Wear Analysis.
- Source :
- Journal of Arthroplasty; Apr2011, Vol. 26 Issue 3, p497-503, 7p
- Publication Year :
- 2011
-
Abstract
- Abstract: Geometric wear analysis techniques require unworn geometries to serve as a reference in wear measurement. A method to create a reference geometrical model is described for retrieval studies when the actual unworn geometry is unavailable. Never-implanted tibial inserts were scanned with micro–computed tomography. Two, 3, or 6 insert surfaces were coaligned and averaged to create reference geometries. Individual inserts were compared with each other (manufacturing variability) and with the reference geometries (reference variability). The 3-dimensional deviations between the surfaces were recorded. The reference variability was reduced to 8.3 ± 39 μm, vs manufacturing variability of 15 ± 59 μm. Deviations were smallest on the articular surfaces where most wear occurs and were significantly less than the reported insert wear rate of 20 μm/y. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 08835403
- Volume :
- 26
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Journal of Arthroplasty
- Publication Type :
- Academic Journal
- Accession number :
- 59637109
- Full Text :
- https://doi.org/10.1016/j.arth.2010.01.096