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CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2023; 58(01): 067-071
DOI: 10.1055/s-0041-1736468
Artigo Original
Joelho

The Variation of the Patellar Height in Total Knee Arthroplasties and its Relationship with the Replacement or not of the Patella

Article in several languages: português | English
Marcos Henrique Frauendorf Cenni 
1   Rede Mater Dei de Saúde, Belo Horizonte, MG, Brasil
,
Lúcio Flávio Biondi Pinheiro Junior 
1   Rede Mater Dei de Saúde, Belo Horizonte, MG, Brasil
,
Mateus Aguilar de Oliveira 
1   Rede Mater Dei de Saúde, Belo Horizonte, MG, Brasil
,
Augusto Groberio Lago 
1   Rede Mater Dei de Saúde, Belo Horizonte, MG, Brasil
,
Raphael Cardoso Rodrigues 
1   Rede Mater Dei de Saúde, Belo Horizonte, MG, Brasil
› Author Affiliations Financial Support The present research did not receive any specific scholarship from funding agencies in the public, commercial or not-for-profit sectors.
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Abstract

Objective To compare the measurement of patellar height in the pre- and postoperative period of total knee arthroplasties (TKAs) and its variation in patients with and without patellar replacement.

Methods Retrospective evaluation of radiographs of patients submitted to TKA between 2014 and 2020. Profile radiographs were evaluated using the modified Caton-Deschamps patellar height index, comparing the pre- and postoperative measurements of 90 patients, with a total of 100 knees. Next, two groups were compared with a different surgical technique, considering the replacement or not of the patella. All patients who had x-rays evaluated had indication of TKA by osteoarthrosis without previous procedures that could interfere at patellar height.

Results The statistical analysis showed a statistically significant difference, with the preoperative index superior to the postoperative rate, evidencing an overall decrease in patellar height. The Caton-Deschamps index modified for mean preoperative TKA was 1.41 (±0.25), and it was 1.31 (± 0.25), p < 0.001for postoperative TKA.

No significant difference was found in the variation of this index when comparing the groups with and without patellar replacement. The mean difference of the index in the group without patella was 0.11, and 0.08 in the group with patella, and this difference was considered nonsignificant, p = 0.510.

Conclusion We can conclude that patellar height had significant variation in the total group, with reduction of patellar height in the postoperative period. However, the height did not vary significantly between the postoperative groups with and without patellar replacement, regardless of the choice of the surgeon.

Keywords

patella - knee prosthesis - arthroplasty, replacement, knee

Work developed at Rede Mater Dei de Saúde, Belo Horizonte, MG, Brazil.




Publication History

Received: 14 May 2021

Accepted: 25 June 2021

Article published online:
01 November 2021

© 2022. Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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