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Purpose <p>The elasticity and viscosity of the grafts are both crucial for joint stability, yet the changes trend in short-term following anterior cruciate ligament reconstruction (ACLR) remains unclear. The purpose of this study was to evaluate the short-term variations in graft elasticity and viscosity following ACLR.</p> Methods <p>Sixteen male rabbits underwent ACLR using Achilles tendon graft. Animals were randomly euthanized 15 and 30 days following ACLR. The Young’s modulus and viscosity coefficient of the grafts were measured through uniaxial tensile and creep experiments.</p> Results <p>The cross-sectional area of the graft decreased mainly between day 15 and day 30 with no significant. The Young’s modulus decreased significantly between day 0 and day 15. while the decrease in viscosity coefficient significantly between day 0 and day 30. The average of uniaxial tensile Young’s moduli at day 0, 15, and 30 were 293.11 ± 42.58&#xa0;MPa, 23.75 ± 6.62&#xa0;MPa, and 9.02 ± 3.46&#xa0;MPa, respectively, compared with 37.52 ± 6.12&#xa0;MPa for the native ACL. The average of viscosity coefficients at 0, 15, and 30 days were 255.00 ± 55.06&#xa0;MPa∙s, 205.56 ± 68&#xa0;MPa∙s, and 58.06 ± 11.04&#xa0;MPa∙s, compared with 159.54 ± 22.61&#xa0;MPa∙s for the native ACL.</p> Conclusion <p>Even the cross-sectional area, elasticity, and viscosity of grafts showed nonlinear decreasing trends in the short term after ACLR, but the patterns of decrease differ. These findings may serve as a reference for preoperative planning and postoperative rehabilitation.</p>

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Short-Term Postoperative Mechanical Properties of Graft in Anterior Cruciate Ligament Reconstruction

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Zizhan Lian,
  • Bin Sun,
  • Xiangfei Kong,
  • Yichen Yan,
  • Jie Yao,
  • Bin Yang,
  • Yubo Fan

摘要

Purpose

The elasticity and viscosity of the grafts are both crucial for joint stability, yet the changes trend in short-term following anterior cruciate ligament reconstruction (ACLR) remains unclear. The purpose of this study was to evaluate the short-term variations in graft elasticity and viscosity following ACLR.

Methods

Sixteen male rabbits underwent ACLR using Achilles tendon graft. Animals were randomly euthanized 15 and 30 days following ACLR. The Young’s modulus and viscosity coefficient of the grafts were measured through uniaxial tensile and creep experiments.

Results

The cross-sectional area of the graft decreased mainly between day 15 and day 30 with no significant. The Young’s modulus decreased significantly between day 0 and day 15. while the decrease in viscosity coefficient significantly between day 0 and day 30. The average of uniaxial tensile Young’s moduli at day 0, 15, and 30 were 293.11 ± 42.58 MPa, 23.75 ± 6.62 MPa, and 9.02 ± 3.46 MPa, respectively, compared with 37.52 ± 6.12 MPa for the native ACL. The average of viscosity coefficients at 0, 15, and 30 days were 255.00 ± 55.06 MPa∙s, 205.56 ± 68 MPa∙s, and 58.06 ± 11.04 MPa∙s, compared with 159.54 ± 22.61 MPa∙s for the native ACL.

Conclusion

Even the cross-sectional area, elasticity, and viscosity of grafts showed nonlinear decreasing trends in the short term after ACLR, but the patterns of decrease differ. These findings may serve as a reference for preoperative planning and postoperative rehabilitation.