scholarly journals Mobile Bearing Total Knee Arthroplasty for Valgus Knee Osteoarthritis with Permanent Patellar Dislocation: A Case Report and Review of the Literature

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Kohei Kamada ◽  
Tomoyuki Matsumoto ◽  
Koji Takayama ◽  
Daisuke Araki ◽  
Shingo Hashimoto ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Patellar Dislocation ◽  
Mobile Bearing ◽  
Extensor Mechanism ◽  
Patellar Tracking ◽  
Valgus Knee ◽  
Tibiofemoral Joint ◽  
Total Knee ◽  
Distal Realignment

Permanent patellar dislocation with tibiofemoral joint osteoarthritis is a relatively rare condition. To treat this condition, total knee arthroplasty with proximal or distal realignment of the extensor mechanism has been reported. We report a challenging case of an 80-year-old woman diagnosed with permanent patellar dislocation with tibiofemoral joint osteoarthritis treated by a mobile bearing total knee arthroplasty utilizing navigation system. Lateral retinaculum release was performed to improve patellar tracking; other proximal or distal realignment of the extensor mechanism was not necessary. Postoperative radiographs show stable patellar tracking and recurrent patellar dislocation was not observed. This clinical case indicates that the implant’s precise alignment and rotation during total knee arthroplasty could settle anatomical abnormalities of permanent patellar dislocation and the mobile bearing insert could contribute to stabilizing patellar tracking.

scholarly journals Complications of Patella in Total Knee Arthroplasty (TKA)

2021 ◽  
Vol 6 (5) ◽  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Patellar Instability ◽  
Revision Rate ◽  
Functional Limitation ◽  
Patellofemoral Instability ◽  
Mobile Bearing ◽  
Extensor Mechanism ◽  
Total Knee

Background and Methods: Postoperative complications may impair the outcome of total knee arthroplasty (TKA). Patellar instability is a major cause of postoperative pain and functional limitation for which revision surgery may be necessary [1]. It may occur after TKA with or without patellar resurfacing. RESULTS AND CONCLUSIONS: Subluxation is more common than dislocation; the incidence of symptomatic instability leading to revision is low (0.5 to 0.8%) [2, 3]. In a multicentre study of low contact stress mobile bearing TKAs, only 6 of 259 revisions were associated with patellar instability, which accounted for a revision rate of 0.1% after a mean follow-up duration of 5.7 years [4]. A revision rate of 12% was reported secondary to complications of the extensor mechanism [5]. The aetiology of patellofemoral instability can be related to (1) the surgical technique and component positioning, (2) extensor mechanism imbalance, and (3) other causes.

Mobile-Bearing Total Knee Arthroplasty Improves Patellar Tracking and Patellofemoral Contact Stress

2010 ◽  
Vol 25 (6) ◽  
pp. 920-925 ◽  
Author(s):  
Naohiro Sawaguchi ◽  
Tokifumi Majima ◽  
Takayuki Ishigaki ◽  
Noriaki Mori ◽  
Takashi Terashima ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Contact Stress ◽  
Knee Arthroplasty ◽  
Mobile Bearing ◽  
Patellar Tracking ◽  
Total Knee

Changes in Tibiofemoral Joint Space Following Total Knee Arthroplasty During Weight-Bearing Knee Motion

2009 ◽  
Author(s):  
Kartik M. Varadarajan ◽  
Angela L. Moynihan ◽  
Jong Keun Seon ◽  
Andrew A. Freiberg ◽  
Harry E. Rubash ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Knee Flexion ◽  
Weight Bearing ◽  
Surgical Techniques ◽  
Joint Space ◽  
Extensor Mechanism ◽  
Implant Design ◽  
Tibiofemoral Joint ◽  
Total Knee

Increasing the range of knee flexion following total knee arthroplasty (TKA) remains an important objective for design of new implants and advancement of surgical techniques. With the excellent long term (10–15 year) outcome of TKA, surgeons are more confident about performing the procedure on younger, more active patients demanding increased range of knee flexion [1–3]. Numerous factors have been linked to limited flexion (<120°) following TKA, including patient factors such as preoperative range of motion, intraoperative factors such as component malposition, and implant design [1–3]. Extensor mechanism overstretching due to overstuffing of the knee joint is hypothesized to be a contributing factor limiting knee flexion [1–4]. However, no study to date has investigated the changes in tibiofemoral joint space following TKA. The aim of this study was to examine pre- and post-operative tibiofemoral joint space in a group of TKA patients during weight-bearing knee flexion and to compare it to that in the normal/healthy knee. This could help determine if changes in the proximal-distal distance between the femur and the tibia (tibiofemoral joint space) could lead to extensor mechanism overstretching and consequently limited range of flexion.

Spontaneous dislocation of a mobile-bearing polyethylene insert after posterior-stabilized rotating platform total knee arthroplasty: A case report

The Knee ◽  
2011 ◽  
Vol 18 (6) ◽  
pp. 496-498 ◽  
Author(s):  
Hideo Kobayashi ◽  
Yasushi Akamatsu ◽  
Naoya Taki ◽  
Hirohiko Ota ◽  
Naoto Mitsugi ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Case Report ◽  
Knee Arthroplasty ◽  
Mobile Bearing ◽  
Polyethylene Insert ◽  
Posterior Stabilized ◽  
Rotating Platform ◽  
Total Knee

Total knee arthroplasty using the S-ROM mobile-bearing hinge prosthesis

2001 ◽  
Vol 16 (3) ◽  
pp. 279-287 ◽  
Author(s):  
Richard E. Jones ◽  
John G. Skedros ◽  
Angela J. Chan ◽  
Delbert H. Beauchamp ◽  
Paul C. Harkins
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Mobile Bearing ◽  
Total Knee

Changes in Patellar Tracking After Total Knee Arthroplasty: 10-Year Follow-Up of Miller-Galante I Knees

Orthopedics ◽  
2002 ◽  
Vol 25 (8) ◽  
pp. 811-813
Author(s):  
Tomoyuki Miyagi ◽  
Shuichi Matsuda ◽  
Hiromasa Miura ◽  
Ryuji Nagamine ◽  
Ken Urabe ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Patellar Tracking ◽  
Total Knee

A STUDY TO COMPARE FIXED BEARING AND MOBILE BEARING TOTAL KNEE ARTHROPLASTY IN TERTIARY MEDICAL CENTRE, MUMBAI

2021 ◽  
pp. 42-44
Author(s):  
Amol K Salve ◽  
Vinod Kumar Yadav ◽  
Ajay M Wankhade ◽  
Tanay Nahatkar ◽  
Sangam Jain
Keyword(s):  
Total Knee Arthroplasty ◽  
Range Of Motion ◽  
Knee Arthroplasty ◽  
Articular Surface ◽  
Mobile Bearing ◽  
Inclusion Criteria ◽  
Medical College ◽  
Flexion Gap ◽  
Total Knee

Intro- For TKA, there are two types of bearing designs: xed-bearing and mobile-bearing. Round femoral components articulate with a relatively at tibial articular surface in a xed-bearing knee design. Because the insert does not hinder the natural movements of the femoral component, the mobile-bearing (MB) TKA design is thought to allow more exibility of motion than the xed-bearing (FB) variety. Aim and objective: To compare xed bearing and mobile bearing total knee arthroplasty. Material and methods:This study is a prospective type of study done at Seth GS medical college Mumbai, Department of Orthopaedics during August 2019 to June 2021 on patients undergoing total knee arthroplasty. Patients who were to undergo total knee arthroplasty were invited to take part in the study. This study, done on them was explained in detail to them. An informed consent was obtained. Patients fullling the inclusion criteria were listed. Result: Range of motion achieved after mobile arthroplasty was 123.62±2.94 and in xed arthroplasty it was 121.96±2.74. Pain after last follow up in mobile arthroplasty was 48.83±0.62 and for xed arthroplasty was 47.39±0.86. Flexion gap after last follow up in mobile arthroplasty was 24.13±0.45 and in xed was 24.02±0.45. Stability was almost similar in both mobile and xed arthroplasty. Conclusions: there is no signicant difference between xed arthroplasty and mobile arthroplasty as far as Range of motion, Pain ,Flexion gap. Stability was almost similar in both mobile and xed arthroplasty.

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