180° rotatory dislocation of the rotating platform of a posterior-stabilized mobile-bearing knee prosthesis; possible complication after closed reduction of a posterior dislocation – a case report –

Reconstructed posterior tibial slope (PTS) plays a significant role in kinematics restoration after total knee arthroplasty (TKA). However, the effect of increased and decreased PTS on prosthetic type and design has not yet been investigated. We used a finite element model, validated using in vitro data, to evaluate the effect of PTS on knee kinematics in cruciate-retaining (CR) and posterior-stabilized (PS) fixed TKA and rotating platform mobile-bearing TKA. Anterior-posterior tibial translation and internal-external tibial rotation were investigated for PTS ranging from -3° to 15°, with increments of 1°, for three different designs of TKA. Tibial posterior translation and external rotation increased as the PTS increased in both CR and PS TKAs. In addition, there was no remarkable difference in external rotation between CR and PS TKAs. However, for the mobile-bearing TKA, PTS had less effect on the kinematics. Based on our computational simulation, PTS is the critical factor that influences kinematics in TKA, especially in the CR TKA. Therefore, the surgeon should be careful in choosing the PTS in CR TKAs.

Download Full-text

Kinematic analysis of stair climbing in rotating platform cruciate-retaining and posterior-stabilized mobile-bearing total knee arthroplasties

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-017-2662-6 ◽

2017 ◽

Vol 137 (5) ◽

pp. 701-711 ◽

Cited By ~ 10

Author(s):

Koji Murakami ◽

Satoshi Hamai ◽

Ken Okazaki ◽

Satoru Ikebe ◽

Hiroyuki Nakahara ◽

...

Keyword(s):

Kinematic Analysis ◽

Mobile Bearing ◽

Stair Climbing ◽

Total Knee Arthroplasties ◽

Posterior Stabilized ◽

Rotating Platform ◽

Cruciate Retaining ◽

Total Knee

Download Full-text

Comparison Between Standard and High-Flexion Posterior-Stabilized Rotating-Platform Mobile-Bearing Total Knee Arthroplasties

The Journal of Bone and Joint Surgery (American) ◽

10.2106/jbjs.i.01122 ◽

2010 ◽

Vol 92 (16) ◽

pp. 2634-2642 ◽

Cited By ~ 40

Author(s):

Won Chul Choi ◽

Sahnghoon Lee ◽

Sang Cheol Seong ◽

Jong Hun Jung ◽

Myung Chul Lee

Keyword(s):

Mobile Bearing ◽

Total Knee Arthroplasties ◽

Posterior Stabilized ◽

Rotating Platform ◽

High Flexion ◽

Total Knee

Download Full-text

Commentary on an article by Won Chul Choi, MD, et al.: “Comparison Between Standard and High-Flexion Posterior-Stabilized Rotating-Platform Mobile-Bearing Total Knee Arthroplasties. A Randomized Controlled Study”

The Journal of Bone and Joint Surgery (American) ◽

10.2106/jbjs.j.01602 ◽

2010 ◽

Vol 92 (16) ◽

pp. e29(1)-e29(2) ◽

Cited By ~ 1

Author(s):

Ronald Delanois ◽

Michael A Mont ◽

Ormonde M Mahoney

Keyword(s):

Mobile Bearing ◽

Randomized Controlled Study ◽

Controlled Study ◽

Total Knee Arthroplasties ◽

Posterior Stabilized ◽

Rotating Platform ◽

High Flexion ◽

Randomized Controlled ◽

Total Knee

Download Full-text

Two stage fracture of a polyethylene post in a 9-year-old posterior-stabilized knee prosthesis: a case report

Journal of Medical Case Reports ◽

10.1186/1752-1947-4-65 ◽

2010 ◽

Vol 4 (1) ◽

Cited By ~ 12

Author(s):

Fabio D'Angelo ◽

Daniele Marcolli ◽

Paolo Bulgheroni ◽

Luigi Murena ◽

Terenzio Congiu ◽

...

Keyword(s):

Case Report ◽

Knee Prosthesis ◽

Posterior Stabilized ◽

Two Stage

Download Full-text

The Outcome of Posterior-Stabilized, Rotating Platform Total Knee Arthroplasty at a Minimum Ten-Year Follow-up, a Middle East Institution Experience

The Journal of Knee Surgery ◽

10.1055/s-0040-1716850 ◽

2020 ◽

Author(s):

Ahmed A. Khalifa ◽

Mostafa Fayez ◽

Hesham Elkady ◽

Ahmed M. Abdelaal ◽

Maher A. Elassal

Keyword(s):

Total Knee Arthroplasty ◽

Survival Rate ◽

Middle East ◽

Knee Arthroplasty ◽

Knee Prosthesis ◽

Posterior Stabilized ◽

Rotating Platform ◽

Total Knee

AbstractPosterior-stabilized, rotating platform knee prosthesis design was aimed to decrease polyethylene wear for the sake of improving implant survivorship. The purpose of the present prospective study was to evaluate the long-term clinical and radiographic results as well as the survival rate after using a rotating platform, posterior-stabilized knee prosthesis at a minimum of 10 years at a Middle East institution. We compared the results with reports in the literature on western populations. From January 2002 to June 2008, 96 patients (106 knees) underwent total knee arthroplasty (TKA) using a cemented rotating platform posterior-stabilized knee prosthesis. At a mean of 11.5 ± 1.3 years, 85 patients (95 TKAs) were available for clinical, radiographic, and implant survival analysis. At the final follow-up, 78.9% of the patients had excellent Knee Society Scoring system score, the average knee flexion was 110 ± 17 degrees, the average anatomical knee coronal alignment was 186 ± 2 degrees and 187 ± 3 degrees for varus and valgus knees, respectively. Five (5.2%) knees were revised of these: two for bearing dislocation, two for aseptic loosening, and one for infection. The Kaplan-Meier survival rate was 94.7% for all revisions and 97.8% when only revision for aseptic loosening considered as the end point. At a long-term follow-up, reasonable clinical and radiographic outcomes had been achieved after using a rotating platform, posterior-stabilized knee prosthesis in our population with acceptable survival rate reaching up to 95%, which is comparable to reports from the western population.

Download Full-text