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Knee Surgery, Sports Traumatology, Arthroscopy

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01-12-2020 | KNEE

No clinical differences at the 2-year follow-up between single radius and J-curve medial pivot total knee arthroplasty in the treatment of neutral or varus knees

Authors: Pier Francesco Indelli, Federica Morello, Stefano Ghirardelli, Andrea Fidanza, Ferdinando Iannotti, Augusto Ferrini

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2020

Abstract

Purpose

Modern total knee arthroplasty (TKA) systems are designed to reproduce the normal knee kinematics and improve patient outcome. The authors compared two different third-generation medial pivot TKA implants, having a single-radius or a J-curve design in their sagittal plane, hypothesizing no clinical differences.

Methods

Two cohorts of 50 patients who underwent primary TKA were first preoperatively matched by sex, deformity, body mass index (BMI), Oxford Knee Score (OKS), Knee society score (KSS) and range of motion (ROM) and then statistically analyzed at a minimum follow-up (FU) of 2 years. An identical surgical technique, which aimed to reproduce a slightly tighter medial than lateral compartment, was used in all knees.

Results

At a minimum follow-up of 2 years (range 24–34 months) there were no statistically significant differences in OKS and KSS between the two implant groups. The final ROM differed statistically between the two groups: the average maximum active flexion was 123° in the J-curve femoral design group with an adapted “medially-congruent” polyethylene insert, and 116° in the single radius femoral design with a medial “ball-in-socket” articulation.

Conclusion

No clinical and radiological differences were found when the two cohorts of patients were compared. This study showed that the implant design played a minor role in the final outcome as opposed to a precise surgical technique.

Level of evidence

Retrospective case-control study, Level III.

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Title: No clinical differences at the 2-year follow-up between single radius and J-curve medial pivot total knee arthroplasty in the treatment of neutral or varus knees
Authors: Pier Francesco Indelli
Federica Morello
Stefano Ghirardelli
Andrea Fidanza
Ferdinando Iannotti
Augusto Ferrini
Publication date: 01-12-2020
Publisher: Springer Berlin Heidelberg
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2020
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-020-05854-4

2024 ASCO Annual Meeting

Springer Medicine

No clinical differences at the 2-year follow-up between single radius and J-curve medial pivot total knee arthroplasty in the treatment of neutral or varus knees

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

2024 ASCO Annual Meeting

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

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