Risk Factor of Anterior Cruciate Ligament Rupture After Ligamentoplasty : What is the Importance of a Relative Deficit of Contralateral Hamstrings Assessed by Isokinetic in Postoperative ?

The main risk factors for known ACL lesions are female gender, pivotal sports, neuromuscular deficits, proprioceptive, hormonal, morphological deficits ... Moreover, there is also an increase in the number of contralateral fractures in patients who had a ligamentoplasty. There are many articles on the ACL pathology but unequal on the potential risk factors. The only proven risk factor for contralateral rupture is the age of the first episode; the female sex also seems to be important in some studies but remains more controversial. However, many factors have been studied: the intensity of the sport, the sex, the operative technique of ligamentoplasty, the operating duration, the duration of recovery of the sports activity, the level of recovery (of this sporting activity ) ...

Isokinetics is used to measure the peak of strength of quadriceps and hamstrings, in concentric or eccentric, at slow and fast speed and to determine a hamstring / quadriceps ratio to highlight a deficit or imbalance.

Inclusion criteria

• Athletic patients all levels
• victims of ACL rupture during sports practice,
• operated by the same surgeon
• having been evaluated in isokinetic postoperative in the Sports Medicine Department of Rennes University Hospital
• having resumed a sporting activity
• with the first ACL rupture between 01/01/1994 and 12/31/2015

Exclusion criteria

• Patients with ACL rupture outside of a sporting context
• not having resumed post-operative sports activity on the maximum follow-up period of 15 years
• not evaluated for isokinetic activity in the sports medicine department
• minors at the time of inclusion