DOI 10.1007/s00167-010-1116-2 ACL I FP10-127 Objectiï¬cation of anterior knee instability, taking into account the rotational laxity Mayr H.O.1, Stoehr A.1, Hoell A.1, Bernstein A.2 1 OCM-Clinic, Munich, Germany, 2University Hospital Halle, Orthopedic Surgery, Halle/Saale, Germany Objectives: To develop and validate a portable device for measuring the displacement of the tibia in relation to the femur in response to an ap force and a torque on the lower leg against the thigh. Methods: A measuring device with storage and ï¬xation of the foot at a deï¬ned knee ï¬exion and medial and lateral counter-bearing for the knee was developed. Rotation of the tibia is deï¬ned by torque on the footplate with the ankle locked by dorsiï¬exion. A commercially available arthrometer was used to determine AP translation of the tibia in relation to the femur at lower leg rotation with a deï¬ned torque. Validation of intrarater- and interrater-reliability was conducted with 30 subjects: 10 healthy volunteers, 10 sujects with isolated ACL-rupture and 10 subjects with ACL-rupture plus medial instability. The anterior drawer force was 15 lbs., 20 lbs., 30 lbs. and manual maximum. The knee was stored in 30 degrees ï¬exion. The ankle was locked by dorsiï¬exion with 2 Nm torque.
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Follow Knee Surgery, Sports Traumatology, Arthroscopy
, Volume 18 (1)
Springer Journals – Jun 1, 2010
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