Studies ACL: Anterior cruciate ligament
  • Anterior cruciate ligament (ACL) injury/tear
  • ACL reconstruction surgery techniques
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  • ACL Rehab: How are arthrometers crucial to recover from ACL Surgery? New arthrometer NEW GNRB / ROTAM Research Studies GNRB Knee Arthrometer: More than just objective results on the ACL... The Future of Treating ACL Tears: Arthrometers Where can I order a KT1000 knee ligament arthrometer? KT-1000 vs. GNRB video: Testing the ACL with both arthrometers NEW GNRB STUDY KT1000 Arthrometer : Test Knee Laxity ESSKA BEST E-POSTER AWARD - GNRB ARTHROMETER
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    What is Laximetry? Knee laxity tests - Genourob's LDA® Method
  • Lachman test (automated)
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  • ACL injury/tear assessment
  • ACL test - Medial rotation
  • PCL injury/tear assessment
  • ACL test - Adapted to x-ray technology
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  • Knee ligamentous laxity assessment/test
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    The LDA®: An innovative help in the diagnostics of ligament lesions and a new tool in the postoperative follow-up

    As a primary intention, confirming suspect clinical examinations, the Automated Dynamic Laximetry, LDA, features an objective detection of ACL (GNRB) and PCL (GNRB PCL) lesions and peripheral ligamentous structures (ROTAM)

    Postoperative, the obtained results inform about the healing process and the status of the ligament-plasty resistance, giving precise orientation on the choice of rehabilitation techniques.

    The GNRB and ROTAM are the only automated dynamic laximeters, where the test results can be integrated into patient data-management system of the institute.

    Precise and objective functional evaluation of ACL / Follow-up of the reconstruction.


    The GNRB performs an automated anterior tibia translation and calculates new parameters for a more accurate evaluation of the ligament functionality of the knee.

    Example of preoperative control *
    Δ134 = 2,4 mm, ΔP2 = 18 μm/N
    Almost complete lesion shown by divergent curves, major functional instability.

    In arthroscopy : Fostering by the PCL, no functional engagement of the ACL (connection without resistance, soft tissue). In MRI : difficult exploration (hemarthrosis, effusion)


    The laxity controls performed at regular intervals can be done with weak adapted pushes and therefore without risks for the ligament-plasty.

    Example of a postoperative follow-up after 3 months            Δ134 = 1,2 mm, ΔP2 = 0

    Good development of the plasty. The parallel curves show a good resistance of the ligament-plasty against the adapted pushes, without delay. The ligament-plasty is functional and the curves should ideally remain parallel until the end of the ligamentisation process.

    Precise and objective evaluation of peripheral ligament structures

    The ROTAM applies a motorized torque to the tibia-ankle-foot bloc and registers the provoked rotation, as well medial as lateral.


    Δ°r > 6
    Divergent curves
    Pathologic state of the ligament
    Extra-articular surgery recommended




    Δ°r = 0
    Reconstruction successful
    Parallel curves
    Good ligament resistance

    The LDA® : Objective Quality Assurance

    The LDA® measures validate the quality of the surgical intervention and the follow-up.
    The tests performed on every patient provide a precise documentation for the Quality Management System of the institute and also for the patient.

    Measurement accuracy, the automatic saving and the reproducibility are appreciated by all practitioners looking for reliable and documented tests.

    The units GNRB and ROTAM for orthopedics