Description of an evaluation system for knee kinematics in ligament lesions, by means of optical tracking and 3D tomography,

• Main Authors: Tiago Lazzaretti Fernandes, Douglas Badillo Ribeiro, Diogo Cristo da Rocha, Cyro Albuquerque, César Augusto Martins Pereira, André Pedrinelli, Arnaldo José Hernandez
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Ortopedia e Traumatologia 2014-10-01
• Series: Revista Brasileira de Ortopedia
• Subjects: Articulação do joelho; Ligamento cruzado anterior; Tomografia computadorizada por raios X
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162014000500513&lng=en&tlng=en

Objective:To describe and demonstrate the viability of a method for evaluating knee kine matics, by means of a continuous passive motion (CPM) machine, before and after anterio cruciate ligament (ACL) injury.Methods:This study was conducted on a knee from a cadaver, in a mechanical pivot-shif simulator, with evaluations using optical tracking, and also using computed tomography.Results:This study demonstrated the viability of a protocol for measuring the rotation an translation of the knee, using reproducible and objective tools (error<0.2mm). The mech anized provocation system of the pivot-shift test was independent of the examiner an always allowed the same angular velocity and traction of 20 N throughout the movement.Conclusion:The clinical relevance of this method lies in making inferences about the in viv behavior of a knee with an ACL injury and providing greater methodological quality in futur studies for measuring surgical techniques with grafts in relatively close positions.