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. 2024 Jul 22;32(3):e276755.
doi: 10.1590/1413-785220243203e276755. eCollection 2024.

SHORT-TERM EVALUATION BETWEEN POLYETHYLENE THICKNESS IN PRIMARY TOTAL KNEE ARTHROPLASTY

Rodrigo Sattamini Pires E Albuquerque  1   2 , Thales Ramos Pizziolo  1 , Octavio Augusto Tome da Silva  1 , Marcelo Alfredo Guerra Monteiro  1 , Sandra Tie Nishibe Minamoto  1 , Alan de Paula Mozella  1
Affiliations

SHORT-TERM EVALUATION BETWEEN POLYETHYLENE THICKNESS IN PRIMARY TOTAL KNEE ARTHROPLASTY

Rodrigo Sattamini Pires E Albuquerque et al. Acta Ortop Bras. .

Abstract
in English, Portuguese

Objective: The objective of the research was to carry out a comparative study between Smith & Nephew ® or Zimmer ® prostheses with thick versus thin polyethylene, in patients undergoing primary total knee arthroplasty, during a short-term follow-up. Thus, the objective was to analyze the survival of the implants in question under the clinical and radiographic aspect.

Methods: The sample was divided into two groups: Group 1 with thick polyethylene and group 2 with thin polyethylene. A clinical analysis of the patients was carried out and the implants were checked for loosening.

Results: The groups were similar when compared. According to the Ahlbäck classification, 83% of the patients were in groups IV and V. The median functional score in the postoperative period was similar between the two groups. Postoperatively, the tibiofemoral angle fluctuated between 5 and 6 0 valgus on average. Two complications were observed in each group. None of the evaluated patients presented implant loosening.

Conclusion: Patients treated with thick polyethylene had the same functional score as the control group, as well as the absence of radiographic changes in this short-term follow-up, with implant survival and a similar rate of complications between both groups. Level of evidence III, Retrospective study.

Objetivo: O objetivo desta pesquisa foi realizar um estudo comparativo entre as próteses Smith & Nephew ® e Zimmer ®, com polietileno espesso versus o fino, em pacientes submetidos à artroplastia total primária do joelho, durante um seguimento de curto prazo. Dessa forma, foi analisada a sobrevida dos implantes em questão sob o aspecto clínico e radiográfico.

Métodos: A amostra foi dividida em dois grupos: grupo 1 com polietileno espesso e grupo 2 com polietileno fino. Foi realizada análise clínica dos pacientes e verificado se ocorreu soltura dos implantes.

Resultados: Os grupos tiveram resultados semelhantes quando comparados. Segundo a classificação de Ahlbäck, 83% dos pacientes eram dos grupos IV e V. A mediana do escore funcional no pós-operatório foi similar entre os grupos. No pós-operatório o ângulo tíbio-femoral oscilou na média entre 5 e 6 0 de valgo. Foram observadas duas complicações em cada grupo. Nenhum dos pacientes avaliados apresentou soltura do implante.

Conclusão: Os pacientes tratados com o polietileno espesso apresentaram o mesmo escore funcional do grupo controle, assim como ausência de alterações radiográficas nesse seguimento de curto prazo, com sobrevida do implante e índice de complicações similar entre ambos os grupos. Nível de evidência III, Estudo retrospectivo.

Keywords: Joelho; Knee Arthroplasty; Prosthesis Failure.

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Conflict of interest statement

All authors declare no potential conflict of interest related to this article.

Figures

Figure 1.
Figure 1.. Total knee arthroplasty with thick polyethylene.
Figure 2.
Figure 2.. Total knee arthroplasty with thin polyethylene.
See this image and copyright information in PMC

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