SIGMA® Primary Knee System Balanced Surgical Technique DePuy Synthes Joint Reconstruction 2 DePuy Synthes Joint Reconstruction SIGMA® Primary Knee System Balanced Surgical Technique PFC Chamfer Guides Size Product, DePuy P.F.C. Sigma Knee System, Non-Porous Cruciate Retaining Femoral Component, 73 mm M/L 69 mm A/P, 5 left, sterile, DePuy Orthopaedics, . Functional outcome of PFC Sigma fixed and rotating-platform total knee . system (PFC Sigma or PFC Sigma RP, DePuy, Warsaw, Indiana).

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However, in the fixed-bearing group metal-backed as well as all-polyethylene tibial components were used. This however seems unlikely as the use of the mobile bearing was not associated with a better outcome. Comparison of mobile-bearing and fixed-bearing total knee arthroplasty: A tourniquet was applied routinely. Keep up to date Subscribe to our newsletter. This article has been cited by other articles in PMC. It has also been suggested that mobile bearings minimise stress at the tibial bone—prosthesis interface [ 3 ].

A mobile-bearing total knee prosthesis compared with a fixed-bearing prosthesis. A multicentre single-blind randomised controlled trial. All patients received a PCL retaining prosthesis which was implanted using a computer-assisted technique. The trial showed a statistically significantly greater improvement in extension at one year in the mobile bearing group.

Depuy | PFC Sigma Knee System

Three patients had to fepuy excluded from analysis. Fixed-bearing versus mobile-bearing total knee arthroplasty: Abstract The aim of this study was to determine whether there is a difference in functional outcome between the PFC Sigma fixed-bearing and rotating-platform total knee replacement systems. Fifty-five patients received a fixed-bearing prosthesis and 50 patients a rotating-platform prosthesis. These include randomised controlled trials [ 6 — 815 — 1723 ], prospective case series [ 910 ] and retrospective reviews [ 12 — 1424 ].

Between November and July patients who underwent a primary total knee arthroplasty for osteoarthritis under the care of two orthopaedic surgeons senior authors were invited to take part in this study.

In recent years a number of studies have investigated the functional outcome of the PFC Sigma fixed-bearing and PFC Sigma rotating-platform total knee replacement systems [ 12 — 17 ]. Clin Orthop Relat Res. depky


In the “Sigma Curved Plus” insert was introduced, with a raised anterior edge and manufactured using cross-linked polyethylene. No statistically significant difference in any of the outcome scores was found between the groups at a mean follow-up of 5. The rotating platform, as used in the PFC Sigma RP knee replacement system, has unidirectional motion which has been shown to have less volumetric wear than other mobile designs [ 12 ].

They followed a dpuy postoperative rehabilitation protocol. We carried out a randomised controlled trial comparing the functional outcome and survivorship between the fixed-bearing and rotating-platform PFC Sigma knee replacement systems. The weaknesses of our trial include a relatively high rate of exclusion from analysis and loss to follow-up.

Depuy | PFC Sigma Knee System | Which Medical Device

Results of this combination have not been previously reported. Inconsistent reporting did not allow for meta-analysis of the data. Description From Depuy The Sigm.

Author information Article notes Copyright and License information Disclaimer. Statistical analysis Statistical analysis was performed with the use of SAS software v9. As in previous trials we found no statistically significant difference in overall range of motion between the groups.

There was however no difference in ROM at four years between the groups. We also used common outcome measures and aimed to report data in a standardised way to depyy inclusion of the data in future meta-analyses. This may be explained by the fact that the fixed-bearing group had a statistically significantly greater preoperative mean flexion deformity. The PCL was retained in all patients, but neither patella resurfacing status nor implant fixation technique have been reported.

Data about patient demographics, activity level, previous knee surgery, other joint pathologies, concomitant medical problems and medication were collected prior to surgery.

Highly polished cobalt chrome tibial tray provides smooth surface to minimize polyethylene wear 1 i2 locking mechanism with an interference fit for decreased micromotion 2 Features XLK polyethylene, a moderately cross-linked, oxidatively stable material.


The prostheses were found xigma be well fixed and without evidence of loosening in both cases. Have you used this device?

Intra-operative flexibility Address sihma array of patient needs OR efficiency with common tibial base and preparation as used in higher constrained implant options Allows for bearing rotation that reduces torsional stresses on tibial base 1. This study was approved by the local research ethics committee. In two of these studies [ 1516 ] the patella was routinely resurfaced; in the third study the resurfacing status of the patella was not reported.

Accessed 30 Oct SIGMA is designed to address implant longevity by maximizing femoro-tibial contact area, minimizing peak contact stresses while employing state-of-the-art polyethylene sterilization and packaging. This is intended to substitute for the PCL without using a posterior stabilised component. The posterior cruciate ligament PCL was retained in all cases. Click here pdc visit http: Based cepuy the clinically proven P. J Bone Joint Surg Am. Biorad Medisys Pvt Ltd.

Results may therefore not be transferable to a western European population. Knee Surg Sports Traumatol Arthrosc. If you would like to report a potential cybersecurity vulnerability in any of our products, please refer to our Responsible Disclosure Reporting website.

Patients with rheumatoid arthritis and patients undergoing revision arthroplasty, requiring tibial component augmentation or a constrained prosthesis were excluded from the study. The theoretical advantages of a mobile bearing design are attractive, but there has been no convincing evidence that these theoretical advantages translate into depyy benefit for the patient and deliver a better outcome in the short or long terms.

Mean flexion did not increase in either group, but mean extension improved significantly in both groups. This study shows that there is no statistically significant difference in functional outcome between the two types of implants at short-term follow-up.