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Wolny Tomasz T Department of Kinesiotherapy and Special Physiotherapy Methods, The Jerzy Kukuczka Academy of Physical Education, Katowice, - - 2014
Background. The excessive lateral pressure syndrome is a common complication following anterior cruciate ligament (ACL) reconstruction is. It may lead to premature wear of the articular surfaces of the femur and patella. The aim of the study was to assess the effectiveness of physiotherapy in the treatment of excessive lateral ...
van Velthoven Michelle Helena MH Departments of aGeneral Internal Medicine bEpidemiology, Biostatistics and Health Technology Assessment (HTA), Radboud University Medical Centre, Nijmegen, The - - 2014
To assess the effect of crossing legs at the knee level on wave reflection, as measured by the augmentation index. Forty-two participants crossed their legs at the knee level (popliteal fossa over the suprapatellar bursa) in the sitting position for 12 min. One trained investigator performed the measurements before, during, ...
Pelfort X X Servicio de Cirugía Ortopédica y Traumatología, Parc de Salut Mar, Barcelona, España; Unidad de Rodilla, Institut Català de Traumatologia i Medicina de l'Esport, Instituto Universitario Dexeus, Barcelona, España. Electronic address: - - 2014
To study the relationship between the appearance of end-of-stem pain with a preoperative decrease in local bone strength by using the bone microindentation technique. The potential usefulness of pressure algometry in the diagnosis and monitoring of this group of patients is also determined. A preliminary intra- and inter-rater correlation study ...
Padalecki Jeffrey R JR Robert F. LaPrade, The Steadman Clinic, 181 W. Meadow Drive, Suite 400, Vail, Colorado 81657. - - 2014
Complete radial tears near the medial meniscus posterior root attachment site disrupt the circumferential integrity of the meniscus (similar to a posterior root avulsion). These tears can compromise the circumferential integrity, and they have been reported in biomechanical studies to be comparable with the meniscectomized state. To quantify the tibiofemoral ...
Steinbrück Arnd A Department of Orthopedic Surgery, Physical Medicine and Rehabilitation, University Hospital of Munich (LMU), Campus Grosshadern, Marchioninistr. 15, 81377, Munich, Germany, - - 2014
Patellofemoral complications are one major concern after total knee arthroplasty (TKA). Anterior knee pain is one of these complications and to a high percentage responsible for unsatisfied patients after TKA. Malrotation of the femoral component can contribute to retropatellar peak pressure and consequently to anterior knee pain. Eight fresh frozen ...
Wang Yuxing Y National Key Lab of Virtual Reality Technology, Beihang University, 100191 Beijing, China; Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, 100191 Beijing, China; Interdisciplinary Division of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong - - 2014
Kneeling is a common activity required for both occupational and cultural reasons and has been shown to be associated with an increased risk of knee disorders. While excessive contact pressure is considered to be a possible aggressor, it is not clear whether and to what extent stress on the cartilage ...
Yao Shanshan S Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA. - - 2014
Considerable efforts have been made to achieve highly sensitive and wearable sensors that can simultaneously detect multiple stimuli such as stretch, pressure, temperature or touch. Here we develop highly stretchable multifunctional sensors that can detect strain (up to 50%), pressure (up to ∼1.2 MPa) and finger touch with high sensitivity, ...
Webber Sandra C SC Department of Physical Therapy, School of Medical Rehabilitation, Faculty of Medicine, University of Manitoba, R106-771 McDermot Avenue, Winnipeg, MB, R3E 0T6, Canada, - - 2013
We investigated cardiovascular responses at rest and during submaximal exercise on a lower body positive pressure treadmill in older adults with total knee arthroplasty (TKA). Twenty-four adults (mean age 64.6 ± 7.9 SD) with unilateral TKA participated (median time since surgery 8.0 weeks). Heart rate and blood pressure responses were measured at rest ...
Yazdi Hamidreza - - 2013
The fibula is a valuable source of bone graft and partial or total fibulectomy is done in some procedures, such as upper tibial osteotomy and treatment of tibial nonunion. Previous studies emphasized donor-site morbidity after fibulectomy. The aim of our study was to quantitatively survey joint reaction forces in the ...
Lee Mi Young MY Department of Physical Therapy, College of Health and Therapy, Daegu Haany University, Republic of - - 2013
[Purpose] Sit-to-stand (STS) is one of the important functional tasks people perform throughout the day. This study investigated whether varying angles of knee flexion affect STS patterns in individuals with hemiparesis by using a foot plantar pressure measurement system. [Methods] Fifteen stroke patients with hemiparesis participated for this study. They ...
Prince Matthew R - - 2013
The purpose of this study was to describe the effect of anterior horn of the lateral meniscus (AHLM) tears on tibiofemoral contact pressures and the ability to restore normal parameters with repair. Eight fresh-frozen cadaveric knees were used. The specimens were subjected to a load of 1,000 N at 0 and ...
Goldsmith Greta M - - 2013
There is evidence to suggest vascular involvement in the initiation and progression of osteoarthritis (OA). The relationship between large artery characteristics and pathogenesis of OA has not been investigated and was the aim of this study. Large artery characteristics (i.e. aortic stiffness, brachial and central blood pressure variables) and bone ...
Umay Ebru - - 2013
Background Balneotherapy is a treatment modality that uses the physical and chemical effects of water, including thermomineral, acratothermal, and acratopegal waters. Although balneotherapy is an ancient treatment method that has a limited use within current treatment modalities, it is still widely popular with the public. Studies usually have reported that ...
Yildiz Kadir Ilker - - 2013
No previous description has been made about an objective method to test the graft resistance in MPFL reconstruction intraoperatively. In our study, we aimed to obtain intraoperative objective data about the graft resistance using contact pressure-sensitive surfaces and measuring pressure formed under the graft. In 2012, double-layered contact pressure-sensitive Fuji ...
Bryant Brandon J - - 2013
The effects of valgus load on cadaveric knees following total knee arthroplasty (TKA) were investigated using a custom testing system. TKAs were performed on 8 cadaveric knees and tested at 0°, 30°, and 60° knee flexion in both neutral and 5° valgus. Fuji pressure sensitive film was used to quantify ...
Liu D S - - 2013
Many researches reported that the pathologic medial plica impinges on the facing medial femoral condyle during knee motion and leads to erosive changes of the articular cartilage. The purpose of this study was to construct a simplified three-dimensional dynamic finite element human knee model to evaluate the dynamics behaviour between ...
Brech Guilherme Carlos - - 2013
The aims of this study were to evaluate the anteroposterior displacement behavior of the center of pressure without any visual reference and determine its relationship with knee muscle strength and reports of falls in postmenopausal women. Among those with osteoporosis, the specific objective was to evaluate the correlation of thoracic ...
Lee Jun-Cheol JC Major in Physical Therapy, Graduate School of Daegu University, Republic of - - 2013
[Purpose] The leg angles that are the most effective for abdominal muscle activation were investigated by performing abdominal drawing-in exercises at different leg angles with a biofeedback pressure unit. [Methods] Subjects were asked to adopt a supine position, and the tip of the biofeedback pressure unit was placed under the ...
Wagner Russell A - - 2013
Complications related to the patellofemoral joint after total knee arthroplasty (TKA) represent up to 50% of TKA reoperations. Shear forces across the knee produce wear and occasionally result in failure of fixation of all-polyethylene patellar components. We conducted a study to evaluate the effect of 2 factors on the shear ...
Niewiadomski Wiktor - - 2013
A brief Valsalva manoeuvre, lasting 2-3 s, performed by young healthy men during strength exercise reduces transmural pressure acting on intrathoracic arteries. In this study, we sought to verify this finding in older men. Twenty normotensive, prehypertensive and moderately hypertensive otherwise healthy men 46-69 years old performed knee extensions combined with inspiration ...
Saito Isao - - 2013
To determine the foot pressure pattern of individuals with medial knee osteoarthritis (OA) and analyze its relation with knee flexion/extension range of motion. Descriptive SETTING: Rehabilitation center. Fifty individuals with unilateral painful medial knee OA (mean age, 75 years; OA group) were enrolled as subjects, and 50 young healthy persons ...
Huang Go-Shine - - 2013
The pneumatic tourniquet is frequently used in total knee arthroplasty. Tourniquet deflation may result in hypotension and tachycardia caused by the rapid shift of blood volume back to the ischaemic limb and a decrease in cardiac preload. Passive leg raising (PLR) represents a 'self-volume challenge' that can result in an ...
Steinbrück Arnd - - 2013
Patellofemoral complications are one of the main problems after Total Knee Arthroplasty (TKA). Retropatellar pressure distribution after TKA can contribute to these symptoms. Therefore we evaluated retropatellar pressure distribution subdivided on the ridge, medial and lateral surface on non-resurfaced patella before and after TKA. Additionally, we analyzed axial femorotibial rotation ...
Abraham Adam C AC Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado, 80523, - - 2013
This study investigated the internal fluid pressure of human cadaver meniscal root attachments. A pressure micro-sensor was implanted inside each attachment site. Tibiofemoral joints were compressed to 2× body weight at various flexion angles and pressure recorded for 20 min. The anterior cruciate ligament (ACL) was then transected and joints retested. ...
Dabiri Y - - 2013
The material properties of articular cartilage are depth-dependent, i.e. they differ in the superficial, middle and deep zones. The role of this depth-dependent material inhomogeneity in the poromechanical response of the knee joint has not been investigated with patient-specific joint modeling. In the present study, the depth-dependent and site-specific material ...
Cavaignac Etienne - - 2013
Extra-articular extravasation of irrigation fluid is relatively common around entry incisions and is usually limited to the subcutaneous tissue. Very rarely, extravasation occurs above the knee, in the thigh and even up into the pelvis. We are reporting the second case of irrigation fluid extravasation during a knee arthroscopy, which ...
Stephen Joanna M - - 2013
Medial patellofemoral ligament (MPFL) disruption may alter patellofemoral joint (PFJ) kinematics and contact mechanics, potentially causing pain and joint degeneration. In this controlled laboratory study, we investigated the hypothesis that MPFL transection would change patellar tracking and PFJ contact pressures and increase the distance between the attachment points of the ...
Berthold Justin - - 2013
Abstract Purpose: Ice sledge (or sled) hockey is a fast-paced sport that enables individuals with physical disabilities to play ice hockey. As the attraction to the sport continues to rise, the need for developing better equipment and installing preventative measures for injury will become increasingly important. One such injury includes ...
Patil Shantanu - - 2013
BACKGROUND: The goat is one of the most commonly used preclinical models for focal defect repair and regeneration. While the biomechanics of the human knee has been studied extensively, less is known about the biomechanics of the caprine knee. Differences between human and caprine knees have not been quantified and ...
Forkel Philipp - - 2013
PURPOSE: The purpose of this study was to evaluate the effects of different types of lateral meniscus root tears in terms of tibiofemoral contact stress. METHODS: Ten porcine knees each underwent five different testing conditions with the menisci intact, a simulated lateral posterior root tear with and without cutting the ...
Imbert P - - 2013
PURPOSE: The purpose of this study was to test the hypothesis that the surgical technique using alternating fluid irrigation and carbon dioxide (CO2) gas medium as a means of knee joint distension during arthroscopy is a safe and effective method, compared to traditional fluid arthroscopy. METHODS: This prospective randomized comparative ...
Van Haver Annemieke - - 2013
This article presents a pilot study on a quasi-static knee rig designed to investigate the influence of pathologies and surgical interventions on the patellofemoral kinetics of cadaveric knees. The knee rig allows cadaveric knees to flex and extend under a simulated body weight by transmitting a force to the quadriceps ...
Pandit R R Department of Physiology, Nepal Medical College, Jorpati, Kathmandu, Nepal. - - 2013
Hypertension is recognized as one of the risk factors for cardiovascular mortality and morbidity. Early identification of persons at increased risk for developing hypertension is a priority, which help them, to live a healthy life by altering lifestyle. Persons having predisposing factors of hypertension (e.g., family history of hypertension) show ...
Leichtle Ulf G - - 2013
PURPOSE: Considering the discrepant results of the recent biomechanical studies, the purpose of this study was to simulate dynamic muscle-loaded knee flexion with a large number of specimens and to analyse the influence of total knee arthroplasty (TKA) without and with patellar resurfacing on the patellofemoral pressure distribution. METHODS: In ...
Leumann Andre - - 2013
BACKGROUND: The rabbit knee is a frequently used model for experimental osteoarthritis (OA). Despite the acknowledged importance of joint loading in the onset and progression of OA, the load transfer in the three compartments of the intact rabbit knee remains unknown. Therefore, this study was aimed at determining load transfer ...
Orban H - - 2013
Total knee arthroplasty following valgus deformity is a challenging procedure due to the unique set of problems that must be addressed. The aim of this study is to determine, with a finite element analysis, the load distribution for an inclined valgus prosthetic balanced knee and to compare these results with ...
Dabiri Y - - 2013
The progression of osteoarthritis can be accompanied by depth-dependent changes in the properties of articular cartilage. The objective of the present study was to determine the subsequent alteration in the fluid pressurization in the human knee using a three-dimensional computer model. Only a small compression in the femur-tibia direction was ...
Vaidya Shrinand V - - 2013
Advanced osteoarthritis of knee joint if bilateral, severely restricts patient mobility. This acts as an aggravating factor for pre existing comorbid elements of metabolical syndrome (MS) like Type II diabetes mellitus and hypertension as patients are unable to carry out therapeutic walks. Successfully implanted total knee arthroplasty (TKA) increases physical ...
Choate Christina J - - 2013
Osteochondral autograft transfer (OAT) aims at restoring normal articular cartilage surface geometry and articular contact mechanics. To date, no studies have evaluated the contact mechanics of the canine stifle following OAT. Additionally, there are no studies that evaluated the role of the meniscus in contact mechanics following OAT in human ...
Wilharm A A Department of Trauma, Hand and Reconstructive Surgery, University Hospital Jena, Erlanger Allee 101, 07747 Jena, - - 2013
Pressure-sensitive K-Scan 4000 sensors (Tekscan, USA) provide new possibilities for the dynamic measurement of force and pressure in biomechanical investigations. We examined the sensors to determine in particular whether they are also suitable for reliable measurements of retropatellar forces and pressures. Insertion approaches were also investigated and a lateral parapatellar ...
Bruce Jeremy J University of Tennessee College of Medicine at Chattanooga, Tennessee. - - 2013
Anteromedialization of the tibial tubercle has been shown to unload contact pressure in the distal and lateral region. No study has evaluated pressures after anteriorization of the quadriceps tendon as a way to decrease contact pressures at the patella. In this controlled laboratory study, six cadaveric knees were tested by ...
Tsuyuki Kazuo - - 2013
The ankle-brachial pressure index (ABI) is widely used as a standard screening method for arterial occlusive lesion above the knee. However, the sensitivity of ABI is low in hemodialysis (HD) patients. Exercise stress (Ex-ABI) may reduce the false negative results. After measuring resting ABI and toe-brachial pressure index (TBI), ankle ...
Olivecrona Charlotta - - 2012
Measurement of limb occlusion pressure before surgery might lead to the use of a lower tourniquet cuff pressure during surgery and thereby reduce the risk of postoperative pain and complications. The primary aim of this study was to investigate whether the limb-occlusion-pressure method reduces the tourniquet cuff pressure used during ...
Patil Shantanu - - 2012
Lower body positive pressure (LBPP) treadmills permit significant unweighting of patients and have the potential to enhance recovery following lower limb surgery. We determined the efficacy of an LBPP treadmill in reducing knee forces in vivo. Subjects, implanted with custom electronic tibial prostheses to measure forces in the knee, were ...
Miyazaki K - - 2012
Very little is known about how compression bandages lose interface pressure. We hypothesized that the loss of interface pressure is correlated with the slippage of the bandages, and studied the interface pressure and slippage of three bandages over 8 hours. Twenty-Seven legs from 27 healthy volunteers were bandaged with short ...
Javidan Pooya - - 2012
BACKGROUND:It has been suggested that patellofemoral contact pressures and contact forces may be altered secondary to an opening wedge high tibial osteotomy, yet few data are available that quantify the effect of varying degrees of medial opening wedge osteotomy on the patellofemoral joint contact characteristics. HYPOTHESIS:Opening wedge medial proximal tibial ...
Wurm Simone - - 2012
BACKGROUND: Femoropatellar complications are one of the most common problems after total knee arthroplasty (TKA). However, the question of whether to resurface the patella remains controversial. Therefore, we evaluated the kinetics and the retropatellar contact characteristics of patella resurfacing with fixed and gliding surfaces. METHODS: Eight Thiel-embalmed cadaver knees were ...
Lewinson Ryan T - - 2012
OBJECTIVE:: Patellofemoral pain syndrome (PFPS), the most common running injury, has been associated with increased internal knee abduction angular impulses (KAAI). Wedged footwear can reduce these impulses during walking, but their effects during running are not well understood. The purpose of this study was to identify the effects of wedged ...
King Joseph J JJ - - 2012
PURPOSE: To demonstrate that lateral to medial patellofemoral force and pressure ratios could be a surrogate marker of retinacular tension and patellar tracking. METHODS: The patellofemoral forces of six knees from three fresh-frozen half-body female cadavers were evaluated with a capacitive sensor under simulated operative conditions in six staged clinical ...
Schillhammer Carl K - - 2012
BACKGROUND:Posterior horn detachment (PHD) lesions of the lateral meniscus are commonly associated with acute anterior cruciate ligament (ACL) tears. Multiple surgeons have advocated for repair of this lesion at the time of ACL reconstruction. However, the biomechanical consequences of this lesion and its subsequent repair have not been evaluated. HYPOTHESIS:The ...
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