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使用超声剪切波成像（SSI）弹性成像和拉伸试验评估髌腱和半腱肌肌腱的力学行为

Evaluation of the Mechanical Behavior of the Patellar and Semitendinosus Tendons Using Supersonic Shear-wave Imaging (SSI) Elastography and Tensile Tests.

作者信息

Fontenelle André, Mannarino Pietro, Oliveira Liliam Fernandes de, Menegaldo Luciano Luporini, Souza Sérgio Augusto Lopes de, Fontenelle César Rubens da Costa

机构信息

Serviço de Traumato-Ortopedia, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.

Departamento de Ortopedia e Traumatologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.

出版信息

Rev Bras Ortop (Sao Paulo). 2024 Sep 4;59(4):e556-e563. doi: 10.1055/s-0044-1788290. eCollection 2024 Aug.

DOI:10.1055/s-0044-1788290
PMID:39239578
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11374394/
Abstract

To analyze the mechanical properties of the patellar (PT) and semitendinosus (ST) tendons from fresh-frozen human cadavers from a tissue bank using supersonic shear-wave imaging (SSI) elastography and tensile tests.  We tested seven PT and five ST samples on a traction machine and performed their simultaneous assessment through SSI. The measurements enabled the comparison of the mechanical behavior of the tendons using the stress x strain curve and shear modulus (μ) at rest. In addition, we analyzed the stress x μ relationship under tension and tested the relationship between these parameters. The statistical analysis of the results used unpaired -tests with Welch correction, the Pearson correlation, and linear regression for the Young modulus (E) estimation.  The μ values for the PT and ST at rest were of 58.86 ± 5.226 kPa and 124.3 ± 7.231 kPa respectively, and this difference was statistically significant. The correlation coefficient between stress and μ for the PT and ST was very strong. The calculated E for the PT and ST was of 19.97 kPa and 124.8 kPa respectively, with a statistically significant difference.  The ST was stiffer than the PT in the traction tests and SSI evaluations. The μ value was directly related to the stress imposed on the tendon.  The present is an evaluation of the mechanical properties of the tendons most used as grafts in knee ligament reconstruction surgeries.

摘要

使用超声剪切波成像（SSI）弹性成像和拉伸试验，分析来自组织库的新鲜冷冻人体尸体的髌腱（PT）和半腱肌（ST）肌腱的力学性能。 我们在牵引机上测试了7个PT样本和5个ST样本，并通过SSI对它们进行同步评估。这些测量能够使用应力-应变曲线和静息剪切模量（μ）来比较肌腱的力学行为。此外，我们分析了拉伸状态下应力与μ的关系，并测试了这些参数之间的关系。结果的统计分析使用了带有韦尔奇校正的非配对t检验、皮尔逊相关性以及用于估计杨氏模量（E）的线性回归。 PT和ST在静息状态下的μ值分别为58.86±5.226 kPa和124.3±7.231 kPa，这种差异具有统计学意义。PT和ST的应力与μ之间的相关系数非常强。计算得出的PT和ST的E分别为19.97 kPa和124.8 kPa，具有统计学意义上的差异。 在牵引试验和SSI评估中，ST比PT更硬。μ值与施加在肌腱上的应力直接相关。 本研究是对膝关节韧带重建手术中最常用作移植物的肌腱力学性能的评估。

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