Active clinical trials for "Anterior Cruciate Ligament Injuries"

The investigators intend to establish a national cohort including all persons in the ages from 15-20 years old with patellar instability (PI) or a prior knee injury (ACL-ruptur or meniscus damage) . The cohort will be nicknamed "The Faroese Knee Cohort". The overall aim is to investigate two groups. The patella instability group, in which we intend to investigate the following. Prevalence of patellar dislocation and trochlear dysplasia in the Faroe Islands. Risk factors for patellar dislocations- Heredity of trochlear dysplasia. If there is a specific gene responsible for the development of trochlear dysplasia. The development of retropatellar artrhosis, its onset and its impact on quality of life and function, Knee injury group (ACL-ruptur or meniscus injury) The prevalence of ACL-rupture and/or meniscus injury in this specific group in the Faroe Islands. The impact on quality of life and function.

In this longitudinal prospective cohort study including young people with anterior cruciate ligament (ACL) reconstruction, the investigators will evaluate if poor sensorimotor function at baseline can predict 1) graft rupture 2) the risk of contra-lateral ACL injury and 3) failure to return to sport/previous activity level within 3 years following ACL reconstruction.

The aim is to determine the sensitivity and specificity of a screening tool to identify patients who undergo ACL reconstruction (non-copers) after 3 months of standard rehabilitation following an anterior Cruciate ligament (ACL) injury.

This retrospective study aims at analysing demographics and clinical, functional and biomechanical outcomes in patients after ACL injury (conservative therapy and/or surgery) in patients of different ages and healthy controls. Demographics, as well as clinical, functional and biomechanical parameters were collected between 2019 and 2022 in two research projects approved by the Ethikkommission Nordwestschweiz (EKNZ 2019-00491, EKNZ 2019-01315, EKNZ 2020-00551). The primary research question analyzes if maximal SLH distance and LSISLH distance are related to the predictors age, sex, isokinetic muscle strength and the presence of injury.

This project will develop a data-driven decision making model to assess a competitive athlete's readiness to return to sport after ACL injury and surgery safely.

The study is a quality assurance study, aiming to determine the agreement between two different measurement instruments for assessing knee joint laxity in patients with ACL injuries. The study aims to include 60 patients with previous ACL injury, recruited in an outpatient clinic at Aarhus University Hospital from September 2022 to March 2023. For patients who consent to participate in the study, their knee joint laxity in both the injured and the non-injured knee is assessed using both a Rolimeter and a Lachmeter. Subsequently, the collected data are examined to determined the agreement between the two measurement instruments.

The purpose of the study is to investigate factors that are associated with outcomes of injury to the anterior cruciate ligament (ACL) in the knee among patients who are undergoing surgical reconstruction. This study is a registry of all patients having knee surgery at our institution performed by 4 fellowship-trained orthopaedic surgeons. The surgeon documents patient information on standard data forms including risk factors and surgical findings.

Analysis of Radiological Features of Lateral Femoral Impaction Fracture (LFC-IF) / Lateral Femoral Notch Sign will be performed on MRIs of consecutive patients after anterior cruciate ligament (ACL) injuries and without ACL injuries.

The aim of this observational study is to examine the connection between bone-tendinous defects after BTB graft harvest and the development of anterior knee pain.

Anterior cruciate ligament (ACL) tear is mainly caused by sport injuries. 40% of injuries are attributed to noncontact mechanisms involving pivoting. Regaining quadriceps strength is a primary focus of patients pursuing a rehabilitation program after ACL reconstruction (ACLR). Unfortunately, despite rehabilitation programs aimed at reversing this muscle weakness, quadriceps strength deficits may persist for years. Moreover, this deficit leads to increased risk of sustaining another knee injury, and increased risk for developing posttraumatic osteoarthritis. At present, neither the optimal rehabilitative program nor the clinical and instrumental parameters to take into account at the time of return to activity have reached a consensus among clinicians. The investigators hypothesize that: a persistent deficit in voluntary activation, that is an inability to achieve complete activation of a muscle, is present after ACLR. this deficit in voluntary activation is associated with a phenomenon of "learned/acquired non-use" both in balance and during gait. This phenomenon will be demonstrated by investigating asymmetries in the recruitment of the injured lower limb in balance tests and during gait. the "learned/acquired non-use" paradigm is associated to asymmetries in the hemispheric cortical activity. This phenomenon will be investigated through transcranial magnetic stimulation. The primary endpoint is the demonstration that the quadriceps muscle weakness after ACLR may represent a case of "learned non-use". This behaviour looks automatic and unconscious, so that the adjective "acquired" seems preferable to "learned". It consists of the under recruitment of the impaired side, once healed, as a form of unconscious protection, which is adopted when the contralateral side may carry out the function. The secondary outcome is the investigation of the correlation among the deficits in voluntary activation, in balance tests, during gait, and in the neurophysiologic trials, with the clinical conditions of the patients. It is expected that the injured lower limb show a deficit in the activation of the quadriceps muscle with respect to the contralateral one and with respect to normative data. The impaired limb will present lower recruitment in balance tests and a deficit in power production during gait. The contralesional hemisphere will demonstrate higher interhemispheric inhibition, lower short-interval intracortical inhibition (SICI) and higher short-interval intracortical facilitation (SICF) with respect to the ipsilesional hemisphere. The evidence for an asymmetry between the two lower limbs would support the hypothesis that the "acquired non-use" paradigm has a role in the deficits following ACL lesions and that it is unspecific across asymmetric impairments, and independent of the underlying disease. Results from the present study will allow: the identification of clinical and instrumental criteria to guide the return-to-sport decision following ACLR. the estimate of the sample size for future experimental protocols and new rehabilitative programs.