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Archives of Orthopaedic and Trauma Surgery

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Open Access 18-12-2023 | Knee Arthroplasty

Change in patellar height in medial and lateral unicompartmental knee arthroplasty: a clinical trial

Authors: Riccardo D’Ambrosi, Francesco Rubino, Chiara Ursino, Ilaria Mariani, Nicola Ursino, Matteo Formica, Julia Prinz, Filippo Migliorini

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 3/2024

Abstract

Introduction

Evidence on patellar height changes following unicompartmental knee arthroplasty (UKA) is lacking. Therefore, this study compared the patella height in patients who underwent medial versus lateral UKA. Moreover, a subgroup analysis was conducted to investigate whether sex, age, and BMI of the patients exert an influence on the postoperative patellar height.

Methods

Radiographs and hospital records of patients undergoing UKA were prospectively collected. Surgeries were performed by one author with long experience in UKA in a highly standardised fashion. The implants were fixed-bearing medial PPK (Zimmer Biomet, Warsaw, Indiana, USA) and fixed-bearing lateral ZUK (Lima Corporate, Udine, Italy). The patellar height was measured using the Insall–Salvati and Caton–Deschamps indices.

Results

A total of 203 patients were included: 119 patients were included in the medial and 84 in the lateral UKA. The mean age of the patients was 68.9 ± 6.7 years, and the mean BMI was 28.1 ± 4.1 kg/m². 54% (110 of 203 patients) were women. On admission, between-group comparability was found in age, BMI, sex, and length of the follow-up. No between-group and within-group difference was detected pre- and post-operatively in the Insall–Salvati and Caton–Deschamps indices in patients who have undergone medial versus lateral UKA. Concerning the subgroup analyses, no between-group and within-group difference was detected pre- and post-operatively in all comparisons according to sex, age, and BMI.

Conclusion

No difference was found in patella height in patients who have undergone medial compared to lateral UKA. Furthermore, there was no evidence of an association between patient characteristics (sex, age, BMI) and patella height between medial and lateral UKA.

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Title: Change in patellar height in medial and lateral unicompartmental knee arthroplasty: a clinical trial
Authors: Riccardo D’Ambrosi
Francesco Rubino
Chiara Ursino
Ilaria Mariani
Nicola Ursino
Matteo Formica
Julia Prinz
Filippo Migliorini
Publication date: 18-12-2023
Publisher: Springer Berlin Heidelberg
Published in: Archives of Orthopaedic and Trauma Surgery / Issue 3/2024
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-023-05139-8

ERS Congress 2024

Springer Medicine

Change in patellar height in medial and lateral unicompartmental knee arthroplasty: a clinical trial

Abstract

Introduction

Methods

Results

Conclusion

ERS Congress 2024

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusion

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