Rotational Laxity Control by the Anterolateral Ligament and the Lateral Meniscus Is Dependent on Knee Flexion Angle: A Cadaveric Biomechanical Study.

Rotational Laxity Control by the Anterolateral Ligament and the Lateral Meniscus Is Dependent on Knee Flexion Angle: A Cadaveric Biomechanical Study. Clin Orthop Relat Res. 2017 May 23;: Authors: Lording T, Corbo G, Bryant D, Burkhart TA, Getgood A Abstract BACKGROUND: Injury to the anterolateral ligament (ALL) has been reported to contribute to high-grade anterolateral laxity after anterior cruciate ligament (ACL) injury. Failure to address ALL injury has been suggested as a cause of persistent rotational laxity after ACL reconstruction. Lateral meniscus posterior root (LMPR) tears have also been shown to cause increased internal rotation of the knee. QUESTIONS/PURPOSES: The purpose of this study was to determine the functional relationship between the ALL and LMPR in the control of internal rotation of the ACL-deficient knee. Specifically: (1) We asked if there was a difference in internal rotation among: the intact knee; the ACL-deficient knee; the ACL/ALL-deficient knee; the ACL/LMPR-deficient knee; and the ACL/ALL/LMPR-deficient knee. (2) We also asked if there was a difference in anterior translation among these conditions. METHODS: Sixteen fresh frozen cadaveric knee specimens (eight men, mean age 79 years) were potted into a hip simulator (femur) and a 6 degree-of-freedom load cell (tibia). Rigid optical trackers were inserted into the proximal femur and distal tibia, allowing for the motion of the tibia with respect to the femur t...
Source: Clinical Orthopaedics and Related Research - Category: Orthopaedics Authors: Tags: Clin Orthop Relat Res Source Type: research

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Source: MDDI - Category: Medical Devices Authors: Tags: Regulatory and Compliance Source Type: news
This article investigates the clinical, functional, and radiographic outcomes in anterior cruciate ligament (ACL) reconstruction patients over 7 years to determine the effects of initial graft tension on outcomes when using patellar tendon (bone–tendon–bone [BTB]) and hamstring tendon (HS) autografts. Ninety patients, reconstructed with BTB or HS, were randomized using two initial graft tension protocols: (1) normal anteroposterior (AP) laxity (“low-tension”; n = 46) and (2) AP laxity overconstrained by 2 mm (“high-tension”; n = 44). Seventy-two patient...
Source: Journal of Knee Surgery - Category: Orthopaedics Authors: Tags: Original Article Source Type: research
en L Abstract OBJECTIVE: To investigate the risk of new meniscal tears after treatment for anterior cruciate ligament (ACL) injury, in children and adults with and without ACL reconstruction. DESIGN: Prognosis systematic review (PROSPERO registration number CRD42016036788). METHODS: We searched Embase, Ovid Medline, Cochrane, CINAHL, SPORTDiscus, PEDro and Google Scholar from inception to 3rd May 2018. Eligible articles included patients with ACL injury (diagnosis confirmed by MRI and/or diagnostic arthroscopy), reported the number of meniscal tears at the time of ACL injury diagnosis/start of treatment ...
Source: British Journal of Sports Medicine - Category: Sports Medicine Authors: Tags: Br J Sports Med Source Type: research
CONCLUSIONS Anterior cruciate ligament suture with the InternalBrace ligament augmentation judging from the results achieved by our group of patients brings very good clinical outcomes already at 6 months postoperatively. This method allows the athletes to return to full load soon. It maintains the kinematics and knee joint proprioception, and thus can potentially contribute to the prevention of post-traumatic arthritis. Strict application of indication criteria is a precondition to success. A longer follow up and evaluation of a larger number of patients will, however, be necessary to definitely confirm the success of thi...
Source: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca - Category: Orthopaedics Tags: Acta Chir Orthop Traumatol Cech Source Type: research
Abstract CONTEXT: Ultrasound imaging provides a cost-effective method of measuring quadriceps morphology, which may be related to self-reported function after anterior cruciate ligament reconstruction (ACLR). OBJECTIVE: To compare quadriceps morphology and strength between limbs in individuals with ACLR and matched control limbs and determine their associations with self-reported function. DESIGN: Cross-sectional study. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Forty-two individuals with ACLR (females = 66%; age = 21.8 ± 2.6 years; time since ACLR = 50.5 ± 29.4...
Source: J Athl Train - Category: Sports Medicine Authors: Tags: J Athl Train Source Type: research
Authors: Lum ZC, Saiz AM, Pereira GC, Meehan JP Abstract Patella baja in total knee arthroplasty can result in impingement, pain, and decreased range of motion. Etiology can range from previous knee surgeries such as anterior cruciate ligament reconstruction, retrograde femoral nail, infrapatellar fat pad resection, and previous total knee arthroplasty. Diagnosis can be confirmed by one of a number of measurements of patellar height including Insall-Salvati and Blackburne-Peel ratios. It is important to differentiate between true patella baja and pseudopatella baja by patellar height ratio. Treatment includes corre...
Source: The Journal of the American Academy of Orthopaedic Surgeons - Category: Orthopaedics Tags: J Am Acad Orthop Surg Source Type: research
Conclusions This study showed that overall ACLR athletes and uninjured athletes have similar biomechanical and neuromuscular responses to fatigue. For two biomechanical parameters, however, we did find an interaction effect, suggesting that landing deficits in ACLR athletes may become clearer in certain tasks when fatigued.
Source: Medicine and Science in Sports and Exercise - Category: Sports Medicine Tags: CLINICAL SCIENCES Source Type: research
Infiltration between popliteal artery and capsule of the knee (IPACK) is a novel technique that can provide additional analgesic relief, although there are no studies to date in the adolescent population. In 3 adolescent patients undergoing anterior cruciate ligament surgery, IPACK block augmented continuous femoral nerve block by providing posterior knee analgesia with no or only minimal opioid needs in the post-anesthesia care unit and did not produce sciatic motor weakness.
Source: A&A Case Reports - Category: Anesthesiology Tags: Case Reports Source Type: research
Condition:   Anterior Cruciate Ligament Rupture Intervention:   Device: App based Serious Gaming with the Genu Sport knee trainer Sponsor:   Hannover Medical School Completed
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
BACKGROUND: Anterior cruciate ligament (ACL) revision surgery has been associated with inferior outcome compared with primary ACL reconstruction. However, this has rarely been investigated in a consecutive cohort limited to patients that have undergone bot...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Age: Adolescents Source Type: news
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