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.
| Original language | English |
|---|---|
| Pages (from-to) | 231-236 |
| Journal | Journal of Knee Surgery |
| Volume | 22 |
| Issue number | 3 |
| Publication status | Published - 2009 |
Bibliographical note
The information about affiliations in this record was updated in December 2015.The record was previously connected to the following departments: Reconstructive Surgery (013240300), Clinical and Molecular Osteoporosis Research Unit (013242930), Medical Radiology Unit (013241410)
Subject classification (UKÄ)
- Orthopedics
- Radiology, Nuclear Medicine and Medical Imaging
- Surgery