Five-Year Follow-up of Primary Optetrak Posterior Stabilized Total Knee Arthroplasties in Osteoarthritis

2005 ◽  
Vol 20 (7) ◽  
pp. 927-931 ◽  
Author(s):  
Raymond P. Robinson
Keyword(s):  
Total Knee Arthroplasties ◽  
Posterior Stabilized ◽  
Total Knee

scholarly journals Varus-valgus constrained insert with posterior-stabilized femoral components in complex primary total knee arthroplasties

2021 ◽  
Vol 2 (11) ◽  
pp. 921-925
Author(s):  
Afton K. Limberg ◽  
Cody C. Wyles ◽  
Michael J. Taunton ◽  
Arlen D. Hanssen ◽  
Mark W. Pagnano ◽  
...  
Keyword(s):  
Aseptic Loosening ◽  
Total Knee Arthroplasties ◽  
Posterior Stabilized ◽  
Joint Registry ◽  
Primary Tkas ◽  
Superficial Wound ◽  
Manipulation Under Anaesthesia ◽  
Total Knee ◽  
Primary Total Knee

Aims Varus-valgus constrained (VVC) devices are typically used in revision settings, often with stems to mitigate the risk of aseptic loosening. However, in at least one system, the VVC insert is compatible with the primary posterior-stabilized (PS) femoral component, which may be an option in complex primary situations. We sought to determine the implant survivorship, radiological and clinical outcomes, and complications when this VVC insert was coupled with a PS femur without stems in complex primary total knee arthroplasties (TKAs). Methods Through our institution’s total joint registry, we identified 113 primary TKAs (103 patients) performed between 2007 and 2017 in which a VVC insert was coupled with a standard cemented PS femur without stems. Mean age was 68 years (SD 10), mean BMI was 32 kg/m2 (SD 7), and 59 patients (50%) were male. Mean follow-up was four years (2 to 10). Results The five-year survivorship free from aseptic loosening was 100%. The five-year survivorship free from any revision was 99%, with the only revision performed for infection. The five-year survivorship free from reoperation was 93%. The most common reoperation was treatment for infection (n = 4; 4%), followed by manipulation under anaesthesia (MUA; n = 2; 2%). Survivorship free from any complication at five years was 90%, with superficial wound infection as the most frequent (n = 4; 4%). At most recent follow-up, two TKAs had non-progressive radiolucent lines about both the tibial and femoral components. Knee Society Scores improved from 53 preoperatively to 88 at latest follow-up (p < 0.001). Conclusion For complex primary TKA in occasional situations, coupling a VVC insert with a standard PS femur without stems proved reliable and durable at five years. Longer-term follow-up is required before recommending this technique more broadly. Cite this article: Bone Jt Open 2021;2(11):921–925.

Prospective randomized trial of standard versus highly crosslinked tibial polyethylene in primary posterior-stabilized total knee arthroplasty

2019 ◽  
Vol 101-B (7_Supple_C) ◽  
pp. 33-39 ◽  
Author(s):  
P. F. Lachiewicz ◽  
J. A. O’Dell
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Randomized Study ◽  
Posterior Stabilized ◽  
Function Score ◽  
Score Change ◽  
Osteolytic Lesions ◽  
Significant Difference ◽  
Total Knee

Aims There is insufficient evidence to recommend the use of alternative polyethylene bearings in modular, fixed-bearing total knee arthroplasty (TKA). The purpose of this study was to compare standard polyethylene (SP) and highly crosslinked polyethylene (XLP) tibial liners in posterior-stabilized TKA, with osteolysis as the primary outcome and clinical results and the rate of re-operation as the secondary outcomes. Patients and Methods This is a single-surgeon, prospective randomized study involving one design of modular posterior-stabilized TKA. An analysis of 122 TKAs with an SP compression moulded liner and 123 with an XLP liner was performed, with a mean follow-up of six years (2 to 11). Patients were evaluated clinically using the Knee Society score, Lower Extremity Activity Score (LEAS), and the presence of an effusion, and standard radiographs were assessed for radiolucent lines and osteolytic lesions. Results Osteolysis was present in four TKAs (3.3%) in the SP group, and no knees in the XLP group (p = 0.06). There were no significant differences between the Knee Society total score, change in total score, knee function score, change in function score, LEAS, and change in LEAS in the two groups. There was a significant difference in the presence of an effusion (10/122 with SP liners, 1/123 with XLP liners; p = 0.02). There was no significant difference in the rate of re-operation between the two groups (p = 0.36). There were no complications related to the XLP liner. Conclusion At this length of follow-up, there were no advantages and no complications related to the use of this XLP tibial liner. The presence of effusion and small osteolytic lesions was more frequent with SP than XLP liners, but of unknown clinical significance. Cite this article: Bone Joint J 2019;101-B(7 Supple C):33–39

scholarly journals In vivo kinematics of gait in posterior-stabilized and bicruciate-stabilized total knee arthroplasties using image-matching techniques

2018 ◽  
Vol 42 (11) ◽  
pp. 2573-2581 ◽  
Author(s):  
Koji Murakami ◽  
Satoshi Hamai ◽  
Ken Okazaki ◽  
Yifeng Wang ◽  
Satoru Ikebe ◽  
...  
Keyword(s):  
Image Matching ◽  
Total Knee Arthroplasties ◽  
Posterior Stabilized ◽  
In Vivo Kinematics ◽  
Total Knee ◽  
Matching Techniques

Removal and successful re-implantation of a customized interpositional knee device following an early postoperative infection: A case report

Open Medicine ◽  
2010 ◽  
Vol 5 (4) ◽  
pp. 442-446 ◽  
Author(s):  
Franz Koeck ◽  
Bjoern Rath ◽  
Hans-Robert Springorum ◽  
Markus Tingart ◽  
Joachim Grifka ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Revision Surgery ◽  
Rare Case ◽  
Postoperative Infection ◽  
Clinical Results ◽  
Total Knee Arthroplasties ◽  
First Case ◽  
Alternative Treatment Option ◽  
Total Knee

AbstractWe report the first case of early postoperative infection after a medial hemiarthroplasty of the knee with a customized ConforMIS iForma™ interpositional device. The infection was treated successfully by revision surgery with implant removal and antibiotic therapy. Despite the additional diagnosis of rheumatoid arthritis that did not affect the treated knee, the preservation of bony and ligamentous structures enabled a successful re-implantation of another iForma™ implant 9 months later with good clinical results at follow-up examination 1 year postoperatively. This is very much in contrast to the extensive and complex revision surgery, with significant bone loss, in patients with infected unicompartmental or total knee arthroplasties. The iForma™ device may be an alternative treatment option in early and moderate unicompartmental arthritis of the knee, with easy revision with the same type of implant in the rare case of infection.

scholarly journals Cruciate retaining versus posterior stabilized total knee arthroplasty for the treatment of valgus osteoarthritis?

2019 ◽  
Vol 7 (6_suppl4) ◽  
pp. 2325967119S0023
Author(s):  
Max Ettinger ◽  
Peter Savov ◽  
Henning Windhagen ◽  
Evelyn Mielke ◽  
Tilman Calliess
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Oxford Knee Score ◽  
Valgus Knee ◽  
Posterior Stabilized ◽  
Cruciate Retaining ◽  
Early Revision ◽  
Koos Score ◽  
Total Knee

Aims and Objectives: The debate of cruciate retaining (CR) versus posterior stabilized (PS) designs in total knee arthroplasty (TKA) is ongoing. With the posterior cruciate ligament retained, the TKA is supposed to function better in terms of proprioception, balance and kinematics. In contrast to that, PS designs are supposed to lead to higher degrees of flexion and a better femoral rollback. It is known, that the preoperative deformity negatively correlates with inferior results following TKA. When balancing a valgus knee, Ranawat et al. suggest to address the PCL in the first place. It is known that in 60% of valgus knees 1-2 soft tissue releases are necessary in order to achieve neutral alignment. Up to date no study exists, reporting the outcome of CR versus PS TKA in valgus knees. Thus, it was purpose of this study to evaluate the mid term outcome of CR versus PS TKA for the treatment of valgus OA in groups between 3°-6° of valgus, 7-10° of valgus and >10° of valgus. Materials and Methods: With the KOOS score as the primary endpoint, a sample size of 117 cases (78 CR and 39 PS) was needed in order to get a statistical power of 80%.Between 01-2011 and 03-2014 a total of 248 patients with a preoperative valgus >3° were treated with a CR TKA (167 cases) or a PS TKA (81 cases) of the same manufacturer (Stryker Triathlon, Stryker, Kalamazoo USA). CR patients were divided into the following groups: Preoperative valgus >3°-6°, 7°-10° and >10°. PS patients were divided into the following groups: Preoperative valgus >3°-6°, 7°-10° and >10°. The KOOS Score and the Oxford Knee score was collected at the time of follow up. For the CR and PS group failure rates and failure etiologies were analyzed. Patients demographics and were collected as well. Results: 141 patients were included into this study (97 CR and 44 PS cases). The CR group had a mean follow up of 57&#61617; weeks, the PS group had a follow up of 52&#61617;weeks. In the CR group, 11/97 (11%) patients were revised due to a.p. instability, whereas 2/44 (5%) patients were revised in the PS group due to infection or aseptic loosening. There was no difference regarding OKS and the KOOS score between the two groups. Further, there was no difference regarding patients demographics and no correlation between the BMI and the clinical outcome. Conclusion: The most important findings of this study are that the CR group showed a significant higher early revision rate, whereas the clinical mid term follow up results are equal. The CR version of the used system showed significantly higher early failure due to a.p. instability.

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