Clinical relevance of static and dynamic tests after anatomical double-bundle ACL reconstruction.
A computer navigation system was used to collect kinematic data of 18 subjects undergoing ACL reconstruction. Surgical procedure was an anatomical four-tunnel hamstring double-bundle reconstruction. Static laxity and dynamic laxity were analyzed before and after graft passage and fixation. Correlations between static and dynamic laxities as well as with the preoperative IKDC score were determined. Static and dynamic laxities were significantly reduced after anatomic double-bundle ACL reconstruction (P < 0.05). There were no significant correlations between static and dynamic laxities (r < 0.4, P > 0.05). The preoperative IKDC score was only related to preoperative dynamic laxity (P < 0.01). The dynamic evaluation of pivot shift is able to better describe knee laxity, in particular rotational laxities and has no correlation with static laxity.
Bignozzi
Simone
S
Laboratorio di Biomeccanica, Istituti Ortopedici Rizzoli, Via di Barbiano 1/10, 40136, Bologna, Italy. s.bignozzi@biomec.ior.it
Zaffagnini
Stefano
S
Lopomo
Nicola
N
Fu
Freddie H
FH
Irrgang
James J
JJ
Marcacci
Maurilio
M
D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000601:surgery*; D000070598:Anterior Cruciate Ligament Injuries; D001696:Biomechanical Phenomena; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D007593:Joint Instability / Q000175:diagnosis* / Q000503:physiopathology; D007719:Knee Joint / Q000503:physiopathology*; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods*; D016059:Range of Motion, Articular; D020127:Recovery of Function; D055815:Young Adult