• 作者：M.A. Benhima^a ; ^{m.a.benhima@gmail.com} ; F. Ait Essi^a ; I. Abkari^a ; Y. Najeb^a ; M. Latifi^a ; J.-F. Potel^b ; F. Molinier^b ; M. Boussaton^b
• 关键词：Reconstruction du ligament crois&eacute ; ant&eacute ; rieur ; Double faisceau ; Tendons ischiojambiers ; Fixation ; R&eacute ; sistance ; Tests cycliques
• 刊名：Journal de Traumatologie du Sport
• 出版年：2011
• 期刊代码：pca241_0762915X
• 类别：med
• 出版时间：September 2011
• 卷：28
• 期：3
• 页码：153-158
• 文件大小：302 K

Introduction

Postoperative reeducation and the retaking of precocious activities after the reconstruction of the anterior cruciate ligament (ACL) require a primary fixation to the adequate mechanic characteristics. The aim of the study is to determine the fixation properties with a unique RigidFix^庐 crosspin of the tendinous transplants in tiny diameter tunnels simulating a double bundle reconstruction.

Material and methods

On six adult fresh frozen cadavers (12 femurs and 12 tibias dissected), 48 bone tunnels were prepared in which were fixed with a single 鈥渃rosspin鈥?RigidFix^庐 a tendon with adequate diameter to tunnels (5, 6, 7 and 8 mm). Two types of tests were performed: cyclic test (sinusoidal load between 50 N and 150 N for 500 cycles) and ultimate load test (increasing load with a controlled speed 5 mm/min).

Results

The mean lengthening after 500 cycles was 1,89 卤 0,84 mm. The yield load was 262 卤 60 N with a lengthening of 4,61 卤 1,68 mm. The stiffness of the whole mounting was 61 卤 16 N/mm and the max load is 295 卤 79 N. The resistances (yield load and max load) were more important in the femur than in the tibia.

Discussion

The stress supported by the femoral fixation is less important than the tibia, in view of the application angle when the knee is extended. The yield load result fulfilled the specifications in the femur. At the tibia, the ultimate strength is not enough to allow intensive rehabilitation.

Conclusion

The use of a single 鈥渃rosspin鈥?in an anatomic reconstruction of anterior cruciate ligament is possible at the femur with diameters of the transplant greater than or equal to 6 mm, but not desirable in the tibia.