Wytrykowski Karine, Swider Pascal, Reina Nicolas, Murgier Jérôme, Laffosse Jean Michel, Chiron Philippe, Cavaignac Etienne
Service de Chirurgie Orthopédique et de Traumatologie, Hôpital P.P.R., Toulouse, France.
Laboratoire de Biomécanique, Université Paul Sabatier, Toulouse, France.
Arthroscopy. 2016 Nov;32(11):2288-2294. doi: 10.1016/j.arthro.2016.03.004. Epub 2016 May 7.
To measure the biomechanical properties (maximum load, stiffness, and elongation) of the anterolateral ligament (ALL), gracilis, and iliotibial band (ITB) within the same subject.
Thirteen unpaired knees were used (7 women, 6 men). The donors had a mean age at death of 54 years (range: 37 to 70 years). The mechanical properties of two types of ALL grafts were evaluated: ITB and two-strand gracilis. The mechanical properties of ALL were also measured. Validated methods were used to perform the tensile tests to failure and to record the results. Student's t-test was used to compare the various samples.
The maximum load to failure was 141 N (±40.6) for the ALL, 200.7 N (±48.7) for the gracilis, and 161.1 N (±27.1) for the ITB. Only the gracilis had a significantly higher failure load than ITB and ALL (P = .001 and P = .03). The stiffness was 21 N mm (±8.2) for the ALL, 131.7 N mm (±43.7) for the gracilis, and 39.9 N mm (±6) for the ITB. The elongation at failure was 6.2 mm (±3.2) for the ALL, 19.9 mm (±6.5) for the gracilis, and 20.8 mm (±14.7) for the ITB.
The gracilis had the highest maximum load to failure. The ITB's mechanical properties most closely resemble those of the ALL.
The biomechanical properties of each potential ALL graft can be factored in when deciding which type of graft to use.
在同一受试者体内测量前外侧韧带（ALL）、股薄肌和髂胫束（ITB）的生物力学特性（最大负荷、刚度和伸长率）。
使用13个非配对膝关节（7名女性，6名男性）。供体的平均死亡年龄为54岁（范围：37至70岁）。评估了两种类型的ALL移植物的力学性能：ITB和双股股薄肌。还测量了ALL的力学性能。采用经过验证的方法进行拉伸试验直至失效，并记录结果。使用学生t检验比较各种样本。
ALL的最大失效负荷为141 N（±40.6），股薄肌为200.7 N（±48.7），ITB为161.1 N（±27.1）。只有股薄肌的失效负荷显著高于ITB和ALL（P = 0.001和P = 0.03）。ALL的刚度为21 N/mm（±8.2），股薄肌为131.7 N/mm（±43.7），ITB为39.9 N/mm（±6）。ALL的失效伸长率为6.2 mm（±3.2），股薄肌为19.9 mm（±6.5），ITB为20.8 mm（±14.7）。
股薄肌的最大失效负荷最高。ITB的力学性能与ALL最为相似。
在决定使用哪种类型的移植物时，可以考虑每种潜在ALL移植物的生物力学特性。
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