scholarly journals Factors affecting femoral rotational angle based on the posterior condylar axis in gap-based navigation-assisted total knee arthroplasty for valgus knee

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0197335 ◽  
Author(s):  
Sung-Sahn Lee ◽  
Yong-In Lee ◽  
Dong-Uk Kim ◽  
Dae-Hee Lee ◽  
Young-Wan Moon
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Valgus Knee ◽  
Rotational Angle ◽  
Factors Affecting ◽  
Posterior Condylar Axis ◽  
Posterior Condylar ◽  
Total Knee

Incidence of Femoral Component Malrotation Using Posterior Condylar Referencing in Total Knee Arthroplasty

2019 ◽  
Vol 33 (10) ◽  
pp. 971-977
Author(s):  
Diana K. Lee ◽  
Matthew J. Grosso ◽  
David P. Trofa ◽  
Julian J. Sonnenfeld ◽  
H. John Cooper ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
External Rotation ◽  
Prognostic Impact ◽  
Posterior Condylar Axis ◽  
Femoral Component Rotation ◽  
Component Rotation ◽  
Posterior Condylar ◽  
Total Knee

AbstractProper femoral component rotation in total knee arthroplasty (TKA) is important, given the prognostic impact of a poorly positioned component. The purpose of this observational study was to determine the incidence of femoral component malrotation using posterior condylar axis (PCA) referencing. A total of 100 knees in 92 patients with varus gonarthritis of the knee undergoing primary TKA using a standard medial parapatellar approach were evaluated intraoperatively. After distal femoral resection, the standard femoral sizing guide referencing the posterior condylar axis was used to set femoral component rotation. This was then compared with both the transepicondylar (TEA) and trochlear anteroposterior axes (TRAx). Disparites were recorded and corrected in line with the epicondylar axis. Rotational adjustment for addition of further external rotation was made in 13 (13.0%) cases. In seven cases, the medial pin sites were raised between 1 and 3 mm, and in six cases, the lateral pin site was lowered between 1 and 3 mm (based on risk of notching the femoral cortex). It is critical to not rely exclusively on the PCA to confirm rotational positioning of the femoral component as predicted by posterior condylar referencing guides. Intraoperative adjustment and confirmation using the TEA and TRAx occurred in 13% of primary TKA cases, which might have, otherwise, had a significant effect on the clinical outcome.

scholarly journals Consistency Between Posterior Condylar Axis (+3˚ external rotation) Line and Clinical Transepicondylar Axis Line in Primary Total Knee Arthroplasty

2017 ◽  
Vol 5 (2_suppl2) ◽  
pp. 2325967117S0010
Author(s):  
Zeki Taşdemir ◽  
Hüseyin Bilgehan Çevik ◽  
Nurzat Elmalı ◽  
Özgür Baysal
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
External Rotation ◽  
Primary Total Knee Arthroplasty ◽  
Transepicondylar Axis ◽  
Posterior Condylar Axis ◽  
Rotation Line ◽  
Posterior Condylar ◽  
Total Knee ◽  
Primary Total Knee

Objectives: Purpose of this study is to as certain consistency between posterior condylar axis (PCA) + 3˚ external rotation line and clinical transepicondylar axis (cTEA) line in primary total knee arthroplasty cases. Materials-Methods: During surgery, following distal femoral cut PCA +3 degree external rotation line and cTEA line drawn on the distal femoral cutting surface by ruler and pencil. The both lines on distal femur were recorded by digital camera and relationship between lines was ascertained in reference to PCA +3 degree external rotation [parallel (P), Internal rotation (IR) and External Rotation (ER)]. Results: 9 knees of 9 patients [1 men, 8 women; average age 67 (59-80 age)] were constituted the study group. Evaluation results of the photographs revealed that clinical TEA line in comparison PCA +3 degrees external rotation line was ER in 9 knees (100%) whose mean angles 2.7˚ (1-6) and detected external roation with mean angle 4.7˚ (2-7) in 9 knees. Conclusion:: For determination of FC rotation in surgery setting, different results between cTEA and PCA + 3 degrees techniques possibly may due to disadvantages of techniques and anatomic variation of distal femur. Thus, using both techniques for check each other’s results seems unsafe. In custom made prosthesis, which can be done in the future it will be measured by CT. Keywords: Total knee arthroplasty, femoral component, rotational alignment, femoral transepicondylar axis, posterior condylar axis

Factors Affecting Flexion after Total Knee Arthroplasty

2007 ◽  
Vol 464 ◽  
pp. 53-60 ◽  
Author(s):  
Douglas A Dennis ◽  
Richard D Komistek ◽  
Giles R Scuderi ◽  
Sumesh Zingde
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Factors Affecting ◽  
Total Knee

Factors Affecting Postoperative Range of Motion After Total Knee Arthroplasty

2010 ◽  
Vol 17 (04) ◽  
pp. 196-202 ◽  
Author(s):  
Nehal Gatha ◽  
Henry Clarke ◽  
Robin Fuchs ◽  
Giles Scuderi ◽  
John Insall
Keyword(s):  
Total Knee Arthroplasty ◽  
Range Of Motion ◽  
Knee Arthroplasty ◽  
Factors Affecting ◽  
Total Knee
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