Cavaignac Etienne, Pailhé Regis, Reina Nicolas, Murgier Jérôme, Laffosse Jean Michel, Chiron Philippe, Swider Pascal
Institut de l'appareil locomoteur, CHU Rangueil, 1, avenue Jean Poulhès TSA 50032, 31059, Toulouse Cedex 9, France.
Laboratoire de Biomécanique, Faculté de Médecine, Toulouse, France.
Int Orthop. 2016 Aug;40(8):1647-1653. doi: 10.1007/s00264-015-3027-9. Epub 2015 Nov 5.
The purpose of this study was to determine whether a four-strand gracilis-only construct possesses the biomechanical properties needed to act as an anterior cruciate ligament (ACL) reconstruction graft.
This was a pilot study with 32 cadaver specimens. The biomechanical properties of three types of grafts were determined using validated tensile testing methods: patellar tendon (BTB), both hamstring tendons together (GST4) and gracilis alone (G4).
The maximum load at failure of the G4 was 416.4 N (±187.7). The GST4 and BTB had a maximum load at failure of 473.5 N (±176.9) and 413.3 N (±120.4), respectively. The three groups had similar mean maximum load and stiffness values. The patellar tendon had significantly less elongation at failure than the other two graft types.
The biomechanical properties of a four-strand gracilis construct are comparable to the ones of standard grafts. This type of graft would be useful in the reconstruction of the anteromedial bundle in patients with partial ACL ruptures.
本研究旨在确定仅使用四股股薄肌构建物是否具备作为前交叉韧带（ACL）重建移植物所需的生物力学特性。
这是一项对32个尸体标本进行的初步研究。使用经过验证的拉伸测试方法确定三种类型移植物的生物力学特性：髌腱（BTB）、两条绳肌腱一起（GST4）和单独的股薄肌（G4）。
G4的最大失效载荷为416.4 N（±187.7）。GST4和BTB的最大失效载荷分别为473.5 N（±176.9）和413.3 N（±120.4）。三组的平均最大载荷和刚度值相似。髌腱在失效时的伸长明显小于其他两种移植物类型。
四股股薄肌构建物的生物力学特性与标准移植物相当。这种类型的移植物在部分ACL断裂患者的前内侧束重建中可能有用。
