Flexed femoral component improves kinematics and biomechanical effect in posterior stabilized total knee arthroplasty

2018 ◽  
Vol 27 (4) ◽  
pp. 1174-1181 ◽  
Author(s):  
Kyoung-Tak Kang ◽  
Yong-Gon Koh ◽  
Juhyun Son ◽  
Oh-Ryong Kwon ◽  
Kwan Kyu Park
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Total Knee ◽  
Biomechanical Effect

Total knee arthroplasty after distal femoral osteotomy long-term survivorship and clinical outcomes

2019 ◽  
Vol 101-B (6) ◽  
pp. 660-666 ◽  
Author(s):  
B. P. Chalmers ◽  
A. K. Limberg ◽  
A. G. Athey ◽  
K. I. Perry ◽  
M. W. Pagnano ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Clinical Outcome ◽  
Aseptic Loosening ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Femoral Osteotomy ◽  
Posterior Stabilized ◽  
Distal Femoral Osteotomy ◽  
Total Knee ◽  
The Mean

Aims There is little literature about total knee arthroplasty (TKA) after distal femoral osteotomy (DFO). Consequently, the purpose of this study was to analyze the outcomes of TKA after DFO, with particular emphasis on: survivorship free from aseptic loosening, revision, or any re-operation; complications; radiological results; and clinical outcome. Patients and Methods We retrospectively reviewed 29 patients (17 women, 12 men) from our total joint registry who had undergone 31 cemented TKAs after a DFO between 2000 and 2012. Their mean age at TKA was 51 years (22 to 76) and their mean body mass index 32 kg/m2 (20 to 45). The mean time between DFO and TKA was ten years (2 to 20). The mean follow-up from TKA was ten years (2 to 16). The prostheses were posterior-stabilized in 77%, varus-valgus constraint (VVC) in 13%, and cruciate-retaining in 10%. While no patient had metaphyseal fixation (e.g. cones or sleeves), 16% needed a femoral stem. Results The ten-year survivorship was 95% with aseptic loosening as the endpoint, 88% with revision for any reason as the endpoint, and 81% with re-operation for any reason as the endpoint. Three TKAs were revised for instability (n = 2) and aseptic tibial loosening (n = 1). No femoral component was revised for aseptic loosening. Patients under the age of 50 years were at greater risk of revision for any reason (hazard ratio 7; p = 0.03). There were two additional re-operations (6%) and four complications (13%), including three manipulations under anaesthetic (MUA; 10%). The Knee Society scores improved from a mean of 50 preoperatively (32 to 68) to a mean of 93 postoperatively (76 to 100; p < 0.001). Conclusion A cemented posterior-stabilized TKA has an 88% ten-year survivorship with revision for any reason as the endpoint. No femoral component was revised for aseptic loosening. Patients under the age of 50 years have a greater risk of revision. The clinical outcome was significantly improved but balancing the knee was challenging in 13% of TKAs requiring VVC. Overall, 10% of TKAs needed an MUA, and 6% of TKAs were revised for instability. Cite this article: Bone Joint J 2019;101-B:660–666.

Gap measurement in posterior-stabilized total knee arthroplasty with or without a trial femoral component

2014 ◽  
Vol 134 (6) ◽  
pp. 861-865 ◽  
Author(s):  
Seiju Hayashi ◽  
Yuji Murakami ◽  
Hiroyuki Inoue ◽  
Hiroo Nobutou ◽  
Koji Nishida ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Gap Measurement ◽  
Total Knee

Early Aseptic Loosening with Increased Presence and Severity of Backside Burnishing in the Optetrak Logic Posterior-Stabilized Total Knee Arthroplasty Femoral Component

2021 ◽  
Author(s):  
Michael-Alexander Malahias ◽  
David A. Iacobelli ◽  
Lisa Torres ◽  
Carolena Rojas Marcos ◽  
Allina A. Nocon ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Aseptic Loosening ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Significant Difference ◽  
Group A ◽  
Total Knee ◽  
Group B ◽  
Severe Degree

AbstractConcerns persist that the Optetrak Logic posterior-stabilized (PS) total knee arthroplasty (TKA) femoral component might correlate with early failures due to aseptic loosening. The primary aim of this study was to examine if the use of the Optetrak Logic PS femoral component is associated with early (<5 years) and more extensive aseptic loosening compared with other PS femoral components. This is a single-institution retrieval analysis and revision registry study (based on prospectively collected data) of 27 failed primary PS TKA patients with loose femoral components that underwent revision TKAs between 2016 and 2019. Patients were stratified by components type: Group A (n = 16) received the Optetrak Logic PS femoral component, while Group B (n = 11) received other PS femoral components. Burnishing (macroscopic polishing of the component's backside) was observed and graded as a marker for relative motion at the cement-implant interface. No significant differences were found between the two groups regarding the baseline demographic, radiographic, and clinical characteristics. Mean length of implantation for Group A (3.8 ± 2.9 years) was significantly shorter (p < 0.001) than that of Group B (12.0 ± 6.7 years). A significant difference (p = 0.009) was found in presence of backside femoral burnishing between Group A (15 of 16 patients; 93.8%) and group B (5 of 11 patients; 45.6%). Furthermore, we found a significant difference (p < 0.001) in the severity of burnishing between Group A (13 of 16 patients with severe degree of burnishing; 81.3%) and Group B (1 of 11 patients with severe degree of burnishing; 9.1%). In contrast to Group B, a distinctive macroscopic pattern found in Logic retrieved femoral components (Group A) was the total absence of cement in the backside surface. The use of the Optetrak Logic PS TKA femoral component was associated with early aseptic loosening and increased presence and severity of backside burnishing with early cement-implant interface debonding compared with other commercially available types of PS TKA femoral components. The earlier failure rate with this implant is of concern.

Femoral component placement changes soft tissue balance in posterior-stabilized total knee arthroplasty

2010 ◽  
Vol 25 (9) ◽  
pp. 926-930 ◽  
Author(s):  
Hirotsugu Muratsu ◽  
Tomoyuki Matsumoto ◽  
Seiji Kubo ◽  
Akihiro Maruo ◽  
Hidetoshi Miya ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Soft Tissue ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Soft Tissue Balance ◽  
Posterior Stabilized ◽  
Component Placement ◽  
Total Knee

The Influence of Femoral Component Design in the Elimination of Patellar Clunk in Posterior-Stabilized Total Knee Arthroplasty

2006 ◽  
Vol 21 (2) ◽  
pp. 167-171 ◽  
Author(s):  
Henry D. Clarke ◽  
Robin Fuchs ◽  
Giles R. Scuderi ◽  
Edward L. Mills ◽  
William N. Scott ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Component Design ◽  
Total Knee
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