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

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.

Long-term follow-up and survivorship of single-radius, posterior-stabilized total knee arthroplasty

2018 ◽  
Vol 23 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Moon Jong Chang ◽  
Sangyeon So ◽  
Chan-Deok Park ◽  
Jai Gon Seo ◽  
Young-Wan Moon
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Long Term Follow Up ◽  
Total Knee ◽  
Single Radius

scholarly journals Comparison of Contact Kinematics in Posterior-Stabilized and Cruciate-Retaining Total Knee Arthroplasty at Long-Term Follow-Up

2020 ◽  
Vol 35 (1) ◽  
pp. 272-277 ◽  
Author(s):  
Jordan S. Broberg ◽  
Silvio Ndoja ◽  
Steven J. MacDonald ◽  
Brent A. Lanting ◽  
Matthew G. Teeter
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Posterior Stabilized ◽  
Cruciate Retaining ◽  
Contact Kinematics ◽  
Long Term Follow Up ◽  
Total Knee

scholarly journals Distal Femoral Pin Tracker Placement Prevents Pin Tract-induced Fracture in Robotic-Assisted Total Knee Arthroplasty

2021 ◽  
Author(s):  
Ji-Hoon Baek ◽  
Su Chan Lee ◽  
Jin-Hong Kim ◽  
Hye Sun Ahn ◽  
Chang Hyun Nam
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Distal Femur ◽  
Sagittal Plane ◽  
Knee Prosthesis ◽  
Consecutive Series ◽  
Posterior Stabilized ◽  
Robotic Assisted ◽  
Total Knee

AbstractThe purpose of this study was to determine the effectiveness of the placement of pin trackers in the medial sagittal plane of the distal femur in robotic-assisted total knee arthroplasty (TKA) over a minimum follow-up period of 3 months. From August 2020 to October 2020, a consecutive series of 81 TKAs were performed in 59 patients using the Triathlon posterior-stabilized total knee prosthesis with a robotic-assisted system (Mako) at our hospital. Patient charts were reviewed for complications associated with the pin sites, including fracture, infection, thigh pain, and the need for reoperation. No patients had any minor or major complications associated with distal femoral pins. This technique, which used pin trackers in the medial sagittal plane of the distal femur, could be a useful option for surgeons performing robotic-assisted TKA. This is a Level IV study.

scholarly journals Mid-term Outcome of Total Knee Arthroplasty with Low-restricted Posterior-stabilized Prosthesis in Patients with Severe Fixed Valgus Deformity: A Case-Control Study

2020 ◽  
Author(s):  
Jiani Gou ◽  
Xiaojun Shi ◽  
Senhao Liu ◽  
Jing Yang ◽  
Pengde Kang
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Complication Rate ◽  
Knee Prosthesis ◽  
Valgus Deformity ◽  
Posterior Stabilized ◽  
Group A ◽  
Total Knee ◽  
Group B

Abstract Background: The intraoperative soft tissue balance in primary total knee arthroplasty (TKA) is particularly difficult to perform in patients with severe fixed valgus deformity above 20°, which may have an adverse effect on clinical outcomes. The purpose of our study was to determine whether the TKA with low-restricted posterior-stabilized prosthesis in patients with severe fixed valgus deformity could be as successful as in those with no preoperative deformities by comparing perioperative evaluations and mid-term outcomes.Methods: 45 patients (group A) with severe valgus deformity were treated by TKA with low-restricted posterior- stabilized knee prosthesis; 90 patients (group B) without severe valgus deformity were treated with same surgery and were classified to match the cases in group A. The perioperative evaluations, clinical and radiographic outcomes were compared between the two groups. The postoperative stability was measured by the Kneelax 3 Arthrometer.Results: The mean follow-up time was 7.64 years. There was no significant difference in age, gender, BMI between the two groups. There was no revision for any reason in either group. The mean operation time and blood transfusion rate were 114 minutes and 46.7% in group A, while 81 minutes and 11.1% in group B, respectively. There were significant differences in both parameters between the two groups (p<0.001). The incidence of residual valgus in group A was 20% and the complication rate was 22.2%, while 3.3% and 4.4% in group B, respectively. The incidence of residual valgus and the complication rate was significantly higher in group A than in group B (p=0.004). However, there was no statistical difference in Hospital for Special Surgery (HSS) score, range of motion, component fixation, or knee stability at the most recent follow-up. Conclusion: Although total knee arthroplasty for severe fixed valgus deformity increases the difficulty of operation and the complication rate in perioperative period, low-restricted posterior-stabilized knee prosthesis with proper alignment and soft tissue balance can have satisfactory mid-term outcomes. Level of evidence: Case-control study, Level III.

scholarly journals Robotic vs Navigational vs Conventional Primary Total Knee Arthroplasty. Clinical and Radiological Long-Term Results with a Minimum Follow-up of 10 years -Survivalship Analysis-

10.29007/cvdj ◽  
2020 ◽  
Author(s):  
Seung-Min Na ◽  
Gun-Woo Kim ◽  
Lee Nam-Hun ◽  
Young-Woo Chung ◽  
Jongkeun Seon ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Survival Rate ◽  
Knee Arthroplasty ◽  
Robotic Group ◽  
Navigation Group ◽  
Significant Difference ◽  
Total Knee ◽  
Conventional Total Knee Arthroplasty

The aim of this study was (1) to compare the clinical and radiological outcomes of robotic, navigational and conventional total knee arthroplasty with a minimum follow-up of 10 years, (2) to evaluate the survival rate, (3) and to estimate the accuracy of the three techniques by analyzing the outliers of the total knee arthroplasty (TKA) patients.Methods From January 1992 to December 2008, We evaluated 515 knees who underwent robotic TKA, navigational TKA, or conventional TKA with minimum follow-up of 10 years. Finally, this study including 92 patients (103 knees) who underwent robotic total knee arthroplasty using ROBODOC® , 197 patients (225 knees) who underwent navigational total knee arthroplasty using Orthopilot, and 175 patients (187 knees) who underwent conventional total knee arthroplasty. Hospital for special surgery(HSS) score, Knee Society Score(KSS), Western Ontario and McMaster Universities (WOMAC), and Range of Motion(ROM) were used for clinical evaluation. Mechanical alignment, implant radiological measurements and outliers were analyzed for radiological results. Complication related with surgery was also evaluated. Data were analyzed using SPSS Version 24.0 software and descriptive statistics, paired t‑test, one‑way ANOVA, and Wilcoxon tests. Kaplan-Meier survival analysis was performed for survival rate.Results All clinical assessments including HSS, KSS, WOMAC, and ROM at final follow-up showed excellent improvements in three groups (all, p&lt;0.05), without any significant difference between the groups (p&gt;0.05). In radiologic data, sagittal inclination of femoral implant in robotic group showed better result than another groups with significant difference(p&lt;0.05). The cumulative survival rate was 94.8% in the robotic group, 96.2% in the navigation group, and 92.4% in the conventional TKA group with excellent survival (p=0.563). Complication rate associated surgery was 5.2 % in the robotic group, 5.3% in the navigation group, and 8% in the conventional groupConclusion Our study showed excellent survival with robotic, navigation and conventional TKA and similar clinical outcomes at long-term follow-up. However, in terms of radiological outcome robotic TKA showed accurate position of femoral component. With longer follow-up and larger cohort, the accuracy and effectiveness of robotic TKA on implant survival rate can be elucidated in the future.

scholarly journals Outcomes of the rotating hinge knee in revision total knee arthroplasty with a median follow-up of 6.2 years

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Jake von Hintze ◽  
Mika Niemeläinen ◽  
Harri Sintonen ◽  
Jyrki Nieminen ◽  
Antti Eskelinen
Keyword(s):  
Quality Of Life ◽  
Total Knee Arthroplasty ◽  
Survival Rate ◽  
Knee Arthroplasty ◽  
Revision Total Knee Arthroplasty ◽  
Patient Reported ◽  
Total Knee ◽  
Revision Tka

Abstract Background The purpose of this study was to determine the mid-term clinical, radiographic and health-related quality of life (HRQoL) outcomes and define the survival rate in patients who had undergone revision total knee arthroplasty (TKA) using the single rotating hinged knee (RHK) design. Methods Between January 2004 and December 2013, 125 revision TKAs were performed at our institution using the single RHK implant. We conducted both a retrospective analysis of prospectively collected outcome data of these patients and a prospective follow-up study of all 39 living patients (41 knees). The follow-up phase included an optional extra follow-up visit, PROM questionnaires, and plain radiographs. Results The ten-year Kaplan-Meier survival rate of the revision RHK knees was 81.7% (95% CI 71.9–91.6%) with re-revision for any reason as the endpoint. Overall, 15 knees (12% of the total) underwent re-revision surgery during the follow-up. The median follow-up was 6.2 years (range, 0–12.7 years) post-operatively for the baseline group. One mechanical hinge mechanism-related failure occurred without any history of trauma or infection. At the time of the final follow-up, the majority of patients evinced a fairly good clinical outcome measured with patient-reported outcome measures and none of the components were radiographically loose. Conclusion We found that in patients undergoing complex revision TKA, fairly good functional outcome and quality of life can be achieved using an RHK implant. Further, it seems that in this type of patient cohort, revision TKA using an RHK implant relieves pain more than it improves ability to function. The NexGen® RHK design can be regarded as a suitable option in complex revision TKA.

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
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