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Studying the kinematics of the ACL deficient (ACLD) knees, during different physiological activities and muscle contraction patterns, can improve our understanding of the joint's altered biomechanics due to ACL deficiency as well as the efficacy and safety of the rehabilitations exercises.Twenty-five male volunteers, including 11 normal and 14 unilateral ACLD subjects, participated in this study....
Patellofemoral chondral lesions are frequently identified incidentally during the arthroscopic treatment of other knee pathologies. A role has been described for arthroscopic debridement when symptoms are known to originate from pathology of the patellofemoral joint. However, it remains unclear how to manage lesions which are found incidentally whilst tackling other pathologies. The purpose of this...
Passive restraint capabilities may influence sagittal plane knee joint mechanics during activity. This study aimed to determine if measures associated with passive restraint of anterior translation of the tibia are predictive of peak anterior knee shear force during landing.Passive restraint measures were assessed via joint arthrometry and during 40% body weight simulated weight acceptance using recreationally...
Restoring function and alignment when treating knee arthritis with a total knee arthroplasty (TKA) in patients who have an extra-articular deformity (EAD) from a malunion or with retained femoral hardware is a challenge. The normal anatomical landmarks are hard to find and difficult to use to obtain correct alignment. The procedure will be further challenged by angular deformity of the femur or tibia...
The surface characteristics of the femoral component affect polyethylene wear in modular total knee replacements. In the present retrieval study, the surface characteristics of cobalt–chromium (CoCr) alloy and oxidized zirconium (OxZr) femoral components were assessed and compared.Twenty-six retrieved CoCr alloy femoral components were matched with twenty-six retrieved OxZr femoral components for...
The relationship between meniscal tears and parameniscal cyst formation is contentious. We investigated whether the development of a parameniscal cyst is related to the size of the meniscal tear by using magnetic resonance imaging (MRI).On the basis of a retrospective review of an MRI database, we identified parameniscal cysts in 34 patients with adjacent meniscal tears extending to the meniscocapsular...
This study examined the effects of ankle and knee joint immobilization on postural control in healthy young adults while standing.The 24 participants included in this study participated in postural standing tests under four different constraint conditions: free joints, ankle immobilization only, knee immobilization only, and ankle‐knee immobilization. Tests were performed using a commercial balancing...
Different single-stage surgical approaches are currently under evaluation to repair focal cartilage lesions. This study aims to analyze the clinical and histological results after treatment of focal condylar articular lesions of the knee with microfracture and subsequent covering with a resorbable polyglycolic acid/hyaluronan (PGA -HA) matrix augmented with autologous bone marrow concentrate (BMC)...
The medial patellofemoral ligament (MPFL) acts as a soft tissue restraint to lateral subluxation of the patella, and is frequently damaged following patellar dislocation. A number of techniques for repair or reconstructions of the MPFL have been reported. We report two cases of patellar fracture following MPFL reconstruction utilizing suture anchors and bone tunnels that do not completely traverse...
Platelets are one of the most biocompatible and cost-effective sources of growth factors. Attention is being paid to autologous platelets and platelet-rich plasma. We developed a novel compact platelet-rich fibrin scaffold (CPFS) that was produced from blood and calcium gluconate only. The objective of this study was to investigate the potential of CPFS as a provisional scaffold in two rabbit models...
The purpose of this study is to compare the risk of peri-operative complication events associated with allogenic and autogenic grafts during routine follow-up for six months after primary arthroscopic anterior cruciate ligament (ACL) reconstruction surgery.A retrospective cohort study identified patients that underwent ACL reconstruction via an arthroscopically assisted single tunnel technique. Fixation...
The aim of this study was to describe the clinical outcomes of patients with knee osteoarthritis (OA) treated with arthroscopic surgery, documenting the associated injuries and defining the type of treatment selected for OA patients with different symptoms.Knee arthroscopy is effective for treating patients with symptomatic OA and mechanical symptoms.This was a prospective, consecutive series of 100...
This study was devised to examine the effect of a novel biomechanical therapy for patients suffering from anterior knee pain (AKP).A retrospective analysis of 48 patients suffering from AKP was performed. Patients underwent a gait evaluation, using an electronic walkway mat, and completed the SF-36 health survey and the WOMAC questionnaire at baseline and after 3 and 6months of therapy. A special...
The purpose of this study was to evaluate the influence of both bundles of the anterior cruciate ligament (ACL) on knee stability, anterior–posterior translation (APT) and internal (IR) and external (ER) rotation in cadaveric knees using a computer navigation system.The APT, IR, and ER of the knees were recorded in the intact condition, the anterolateral bundle (AM) or the posterolateral bundle (PL)...
Endoprosthetic replacement (EPR) for limb salvage is an established treatment modality for orthopaedic malignancies around the knee. Increasingly, they are being used for non-tumour indications such as fractures, bone loss associated with aseptic loosening, septic loosening and ligament insufficiencies.We reviewed the evolution and biomechanics of knee EPRs. MEDLINE was searched using the PubMed interface...
Previous research has used time to stabilization (TTS) from forward landing tasks to assess dynamic postural stability in ACL reconstructed (ACLR) athletes in order to identify impaired sensorimotor control and mechanical stability. This may not be an appropriate test due to the fact that research has suggested that ACL injury has a multi-planar mechanism of injury. The purpose of the present study...
Cruciate retaining total knee replacement has been shown to effectively improve pain and quality of life. Successful outcomes depend on many factors, including the maintenance of a competent posterior cruciate ligament. This study sought to anatomically analyze the percentage of PCL injured during a full transverse, tibial cut, thus altering normal function.One hundred and thirty five consecutive...
Stability of the knee joint is achieved by a complex process in which the anterior cruciate ligament (ACL) plays an important role. The rupture of this ligament is quite frequent especially in athletic young subjects. Various methods have been used to reconstruct the ACL. One of the new methods is to use a graft combined from peroneus longus and hamstring. As there is no evidence regarding this method,...
The remnant of the native anterior cruciate ligament (ACL) might contribute to the biological integration of the graft in ACL reconstruction. The aim of this study was to explore whether the preserved remnant enhanced graft healing in ACL reconstruction.Forty New Zealand rabbits underwent bilateral anterior cruciate ligament reconstructions. One knee was treated with a 2-mm remnant preserved on the...
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