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The Posterior Condylar Cartilage Affects Rotational Alignment of the Femoral Component in Varus Knee Osteoarthritis.
- Source :
-
The journal of medical investigation : JMI [J Med Invest] 2017; Vol. 64 (1.2), pp. 24-29. - Publication Year :
- 2017
-
Abstract
- Rotational alignment of the femoral component in total knee arthroplasty (TKA) is important for patellar tracking and ligament balance. Preoperative planning based on radiography might have a potential risk for over-rotation because these X-ray based measurements can not detect asymmetric cartilage wear on posterior condyle. The purpose of this study is to evaluate the effect of the posterior condylar cartilage of varus osteoarthritic knee on rotational alignment of the femoral component in TKA. We established two different condylar twist angles (CTA) from intraoperative multiplanar reconstruction (MPR) images and intraoperative information of navigation system. The CTA measured by a navigation system that includes the cartilage (4.8±2.0°) was smaller than those measured by MPR images, which does not include the cartilage (6.6±2.1°) (p<0.05). The difference between these two angles that corresponds to the remaining posterior condylar cartilage was 1.7±1.2°. This result demonstrated that the posterior condylar cartilage might lead to over-rotational of the femoral component in varus osteoarthritic knee. Therefore, when determining rotational alignment of the femoral component, surgeons should consider the effect of the remaining posterior condylar cartilage to avoid the over-rotation of the femoral component, especially in severe varus knees. J. Med. Invest. 64: 24-29, February, 2016.
- Subjects :
- Aged
Aged, 80 and over
Cartilage, Articular diagnostic imaging
Cartilage, Articular pathology
Cartilage, Articular surgery
Female
Femur diagnostic imaging
Femur pathology
Femur surgery
Fluoroscopy methods
Humans
Image Processing, Computer-Assisted methods
Male
Middle Aged
Osteoarthritis, Knee diagnostic imaging
Osteoarthritis, Knee pathology
Rotation
Arthroplasty, Replacement, Knee methods
Osteoarthritis, Knee surgery
Subjects
Details
- Language :
- English
- ISSN :
- 1349-6867
- Volume :
- 64
- Issue :
- 1.2
- Database :
- MEDLINE
- Journal :
- The journal of medical investigation : JMI
- Publication Type :
- Academic Journal
- Accession number :
- 28373624
- Full Text :
- https://doi.org/10.2152/jmi.64.24