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Erschienen in: Archives of Orthopaedic and Trauma Surgery 8/2022

15.07.2021 | Knee Arthroplasty

Periprosthetic fractures after medial unicompartmental knee arthroplasty: a narrative review

verfasst von: L. Thoreau, D. Morcillo Marfil, E. Thienpont

Erschienen in: Archives of Orthopaedic and Trauma Surgery | Ausgabe 8/2022

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Abstract

Introduction

On rare occasions, fractures of the tibial plateau may occur after uni-compartmental knee arthroplasty (UKA) and account for 2% of total UKA failures. The purpose of this narrative review is to identify and discuss potential risk factors that might lead to prevention of this invalidating complication.

Materials and methods

Electronic database of Pubmed, Scopus, Cochrane and Google Scholar were searched. A total of 457 articles related to the topic were found. Of those, 86 references were included in this narrative review.

Results

UKA implantation acts as a stress riser in the medial compartment. To avoid fractures, surgeons need to balance load and bone stock. Post-operative lower limb alignment, implant positioning, level of resection and sizing of the tibial tray have a strong influence on load distribution of the tibial bone. Pain on weight-bearing signals bone-load imbalance and acts as an indicator of bone remodeling and should be a trigger for unloading. The first three months after surgery are critical because of transient post-operative osteoporosis and local biomechanical changes. Acquired osteoporosis is a growing concern in the arthroplasty population. Split fractures require internal fixation, while subsidence fractures differ in their management depending of the amount of bone impaction. Loose implants require revision knee arthroplasty.

Conclusion

Peri-prosthetic fracture is a rare, but troublesome event, which can lead to implant failure and revision surgery. Better knowledge of the multifactorial risk factors in association with a thorough surgical technique is key for prevention.
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Metadaten
Titel
Periprosthetic fractures after medial unicompartmental knee arthroplasty: a narrative review
verfasst von
L. Thoreau
D. Morcillo Marfil
E. Thienpont
Publikationsdatum
15.07.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Archives of Orthopaedic and Trauma Surgery / Ausgabe 8/2022
Print ISSN: 0936-8051
Elektronische ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-021-04063-z

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