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A clinical and radiostereometric study of the cemented PFC-sigma prosthesis: a 5-year study of 29 cases with a fixed bearing.

von Schewelov, Thord LU ; Besjakov, Jack LU ; Sanzén, Lennart LU and Carlsson, Åke LU (2009) In Journal of Knee Surgery 22(3). p.231-236
Abstract
The press-fit condylar (PFC) cruciate-retaining total knee prosthesis is well documented in the literature. In 1997, a modification of the femoral component was introduced, and the prosthesis was renamed PFC-Sigma. The alteration may influence the migratory and rotational pattern of the tibial component and thus long-time survival rate. In this radiostereometric analysis, we found that the micromotion of the PFC-Sigma prosthesis differs slightly from the original PFC design, an advantage of the PFC-Sigma prosthesis. The median maximum total point motion at 5 years was 0.64 mm for the PFC-Sigma design and 0.79 mm for the previous version of PFC (P = .9). However, the PFC-Sigma rotated less around the transverse (x) axis than did the PFC... (More)
The press-fit condylar (PFC) cruciate-retaining total knee prosthesis is well documented in the literature. In 1997, a modification of the femoral component was introduced, and the prosthesis was renamed PFC-Sigma. The alteration may influence the migratory and rotational pattern of the tibial component and thus long-time survival rate. In this radiostereometric analysis, we found that the micromotion of the PFC-Sigma prosthesis differs slightly from the original PFC design, an advantage of the PFC-Sigma prosthesis. The median maximum total point motion at 5 years was 0.64 mm for the PFC-Sigma design and 0.79 mm for the previous version of PFC (P = .9). However, the PFC-Sigma rotated less around the transverse (x) axis than did the PFC (medians, 0.22 mm and 0.48 mm, respectively; P = .04). From the radiostereometric, radiographic, and clinical data, we conclude that the PFC-Sigma knee prosthesis can be used with confidence. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Knee Surgery
volume
22
issue
3
pages
231 - 236
publisher
Thieme Medical Publishers
external identifiers
  • pmid:19634727
  • scopus:68949133168
ISSN
1538-8506
language
English
LU publication?
yes
id
98032e64-8007-4fc1-8cc8-fb5a6eff4440 (old id 1452748)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/19634727?dopt=Abstract
date added to LUP
2009-08-05 10:25:37
date last changed
2017-01-01 07:50:52
@article{98032e64-8007-4fc1-8cc8-fb5a6eff4440,
  abstract     = {The press-fit condylar (PFC) cruciate-retaining total knee prosthesis is well documented in the literature. In 1997, a modification of the femoral component was introduced, and the prosthesis was renamed PFC-Sigma. The alteration may influence the migratory and rotational pattern of the tibial component and thus long-time survival rate. In this radiostereometric analysis, we found that the micromotion of the PFC-Sigma prosthesis differs slightly from the original PFC design, an advantage of the PFC-Sigma prosthesis. The median maximum total point motion at 5 years was 0.64 mm for the PFC-Sigma design and 0.79 mm for the previous version of PFC (P = .9). However, the PFC-Sigma rotated less around the transverse (x) axis than did the PFC (medians, 0.22 mm and 0.48 mm, respectively; P = .04). From the radiostereometric, radiographic, and clinical data, we conclude that the PFC-Sigma knee prosthesis can be used with confidence.},
  author       = {von Schewelov, Thord and Besjakov, Jack and Sanzén, Lennart and Carlsson, Åke},
  issn         = {1538-8506},
  language     = {eng},
  number       = {3},
  pages        = {231--236},
  publisher    = {Thieme Medical Publishers},
  series       = {Journal of Knee Surgery},
  title        = {A clinical and radiostereometric study of the cemented PFC-sigma prosthesis: a 5-year study of 29 cases with a fixed bearing.},
  volume       = {22},
  year         = {2009},
}