Knee strength deficits after hamstring tendon and patellar tendon anterior cruciate ligament reconstruction

Abstract

Strength deficits localized to specific contraction types and ranges of motion were demonstrated between the ACL and control groups that were dependent upon autograft donor site. Postoperative rehabilitation protocols specific to these deficits should be devised.

Torn ACL: A New Bioengineered Substitute Brought from the Laboratory to the Knee Joint

“…No signs of articular cartilage degeneration were observed in any of the grafted knees, and histological analyses confirmed the macroscopic observations. In situ, the bACL went through a remodelling process, 'ligamentisation', similar to what has been observed in autografts using the central portion of the patellar tendon (Amiel et al 1986;Sabiston et al 1990;Frank and Jackson 1997;Hiemstra et al 2000). Ligamentisation occurs after the vascularisation of the graft and involves gradual assumption of the microscopic properties of normal ACL, an increase in collagen concentration, the formation of bundles in the grafts and the regeneration of the fibrocartilage ligament insertions in the bones of the knee joint.…”

“…In orthopaedics, knee trauma often involves the anterior cruciate ligament (ACL), and the reconstructive options are limited (Olson et al 1988;Sabiston et al 1990;Woods et al 1991;Jackson, Corsetti et al 1996;Frank and Jackson 1997;Hiemstra et al 2000). Novel bioengineering approaches create new adaptive alternatives for tissue replacement in several medical fields (Huynh et al 1999;Petite et al 2000).…”

Motion Alterations After Anterior Cruciate Ligament Reconstruction: Comparison of the Injured and Uninjured Lower Limbs During a Single-Legged Jump

“…6,[8][9][10] The isokinetic test helps to quantify muscular recovery by measuring peak muscle torque of the extensor and flexor muscles of the knee joint. Some authors 1,11 have shown deficits in the quadriceps and hamstrings muscles after ACL reconstruction. However, this test solely focuses on the knee joint and does not take into account the multijoint dimension of movements performed in sport activities.…”

The Reliability of Portable Fixed Dynamometry During Hip and Knee Strength Assessments

“…In recent investigations, Bolgla et al 4 reported that participants with patellofemoral pain syndrome displayed 24% less hip external rotator (ER) and 26% less abductor strength then control participants, whereas Souza and Powers 2 reported that individuals with patellofemoral pain syndrome were 15% weaker in the hip abductors (ABs) and 16% weaker in the hip extensors (HEs) than asymptomatic individuals. Researchers [6][7][8] have also reported strength deficits at the knee as compared with both the contralateral limb and matched controls 1 to 2 years after anterior cruciate ligament reconstruction. Depending on the surgical technique used (eg, bone-patellar tendon-bone or biceps semitendinosus) and muscle group (ie, knee flexors [KFs] or knee extensors [KEs]) assessed, researchers have found these differences to be as great as 11% to 25%.…”

“…Depending on the surgical technique used (eg, bone-patellar tendon-bone or biceps semitendinosus) and muscle group (ie, knee flexors [KFs] or knee extensors [KEs]) assessed, researchers have found these differences to be as great as 11% to 25%. 7,9 Also, strength deficits at the trunk and hip complex may be risk factors for noncontact anterior cruciate ligament tears. 10 However, currently unclear is whether strength deficits are contributory in nature or merely the results of these specific conditions.…”