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Knee Flexion

Anja Wehrle, Sarah Kneis, Hans-Hermann Dickhuth, Albert Gollhofer, Hartmut Bertz
PURPOSE: Acute leukemia (AL) and its initial treatment can impair physical functioning and capacity significantly. Exercise as a countermeasure has been investigated in few studies confirming its feasibility and safety during intensive induction chemotherapy, but the relative effects of diverse exercise programs have not been analyzed. Therefore, we aimed to investigate independent effects of endurance and resistance training on physical capacity and quality of life (QOL). METHODS: Twenty-nine adult AL patients were randomly allocated to an endurance (EG), resistance (RG), or control (CG) group...
August 18, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
Jeheon Moon, Hyeyoung Kim, Jusung Lee, Siddhartha Bikram Panday
BACKGROUND: Knee braces are considered to be extremely useful tools in reducing the shear force of knee joints for non-contact anterior cruciate ligament (ACL) injury prevention. However, the effectiveness of sports knee braces and sleeves remains to be identified. Therefore, the purpose of this study was to evaluate the effectiveness of wearing commercialized sports knee braces and sleeves on knee kinematics, kinetics, and ACL force during drop jumps using musculoskeletal modeling analysis...
August 15, 2018: Knee
Amelia J H Arundale, Holly J Silvers-Granelli, Adam Marmon, Ryan Zarzycki, Celeste Dix, Lynn Snyder-Mackler
The 11+ injury prevention program effectively reduces injuries in high school aged female soccer player, but the mechanism of the 11+ is unknown, particularly whether it impacts biomechanical risk factors associated with knee injuries. The purpose was to report the changes in hip and knee biomechanics with use of the 11+ over two soccer seasons. Two collegiate women's soccer teams performed the 11+ for two soccer seasons. A control team was followed for one season. Athletes performed motion analysis of a drop vertical jump during preseason and postseason...
August 17, 2018: Scandinavian Journal of Medicine & Science in Sports
Deborah Hebling Spinoso, Nise Ribeiro Marques, Dain Patrick LaRoche, Camilla Zamfollini Hallal, Aline Harumi Karuka, Fernanda Cristina Milanezi, Mauro Gonçalves
This study compared functional demand (FD) between older and younger women walking at habitual and fast speed and determined strength thresholds necessary to maintain FD below 80%. FD was calculated by expressing walking flexion and extension joint torques, of the ankle, knee, and hip, as a percentage of maximal strength. Young had an average FD of 65% across joint actions and speeds, whereas older women had FD of 90%. In older women the greatest FD occurred in the hip musculature. The hip, knee and ankle extensor strengths required to maintain FD below 80% were 1...
August 17, 2018: Journal of Aging and Physical Activity
Ahmed Siddiqi, Peter B White, Lisa Kaplin, James V Bono, Carl T Talmo
INTRODUCTION: Few studies have evaluated the concomitant effect of both total knee arthroplasty (TKA) limb alignment and ligament laxity. Therefore, the primary aim of this study is to evaluate the impact of lower extremity alignment on the short-term outcome (one year) following TKA, including pain relief, function, and patient satisfaction. The secondary aim of the study is to evaluate the impact of ligament laxity and balance on early outcomes following TKA. MATERIALS AND METHODS: A prospective evaluation of mechanical alignment and ligament tension was performed for 110 consecutive TKAs using an identical surgical technique...
August 14, 2018: Surgical Technology International
Juha-Sampo Suomalainen, Gideon Regalado, Antti Joukainen, Tommi Kääriäinen, Mervi Könönen, Hannu Manninen, Petri Sipola, Hannu Kokki
BACKGROUND: Measurement of the tibial tubercle-trochlear groove (TT-TG) distance is used to assess patellofemoral instability and rotation. Since patellofemoral instability and acute patellar dislocation are common among adolescents, it is important to clarify the relationship between TT-TG distance and various flexion and extension angles in asymptomatic children. The purpose of the present study was to determine how knee flexion and extension influence TT-TG-distance values measured using 3D imaging in an anatomic axial plane among asymptomatic adolescents...
August 16, 2018: Journal of Experimental Orthopaedics
Emil Toft Nielsen, Kasper Stentz-Olesen, Sepp de Raedt, Peter Bo Jørgensen, Ole Gade Sørensen, Bart Kaptein, Michael Skipper Andersen, Maiken Stilling
Background: An anterior cruciate ligament (ACL) rupture often occurs during rotational trauma to the knee and may be associated with damage to extracapsular knee rotation-stabilizing structures such as the anterolateral ligament (ALL). Purpose: To investigate ex vivo knee laxity in 6 degrees of freedom with and without ALL reconstruction as a supplement to ACL reconstruction. Study Design: Controlled laboratory study. Methods: Cadaveric knees (N = 8) were analyzed using dynamic radiostereometry during a controlled pivotlike dynamic movement simulated by motorized knee flexion (0° to 60°) with 4-N·m internal rotation torque...
August 2018: Orthopaedic Journal of Sports Medicine
Piya Pinsornsak, Adisai Chaiwuttisak, Krit Boontanapibul
BACKGROUND: Theoretically, potential errors in femoral component (FC) sizing can affect postoperative functional outcomes after total knee arthroplasty (TKA), including range of motion (ROM), anterior knee pain, and flexion stability. Incidences of asymmetrical femoral components (AFC) in bilateral TKA have been reported; however; there is a lack of data on exactly why AFC size selection may differ in patients who have had posterior referencing system bilateral TKA. Therefore, this study was conducted to determine risk factors of AFC size selection in patients specifically undergoing posterior referencing bilateral TKA and to compare clinical outcomes between those with AFC or symmetrical femoral component (SFC) sizes...
August 16, 2018: BMC Musculoskeletal Disorders
Haodong Zhou, Guy Trudel, Hans K Uhthoff, Odette Laneuville
INTRODUCTION: Knee injuries are common in sports, and post-injury immobilization is often required to protect healing tissues and alleviate pain, but both the injury and the immobilization can lead to a knee contracture. Knee flexion contractures limit performance. Previous research has identified posterior knee capsule fibrosis as a contributor to immobility-induced knee flexion contractures. This study aims to measure posterior knee capsule length at various durations of remobilization after knee immobilization and to correlate with the recovery of knee range of motion...
August 15, 2018: Medicine and Science in Sports and Exercise
Robert C Marchand, Nipun Sodhi, Manoshi Bhowmik-Stoker, Laura Scholl, Caitlin Condrey, Anton Khlopas, Assem A Sultan, Jared M Newman, Michael A Mont
Although several studies highlight the advantages of robotic arm-assisted total knee arthroplasty (RA-TKA), few investigate its intraoperative outcome. Therefore, the purpose of this study was to analyze the RA-TKA's ability to assist with intraoperative correction of: (1) flexion and (2) extension gaps, as well as its ability to (3) accurately predict implant sizes. Additionally, in this RA-TKA cohort, length of stay, complications, and readmissions were assessed. A total of 335 patients who underwent RA-TKA were included...
August 15, 2018: Journal of Knee Surgery
Guillem Claret-Garcia, Jordi Montañana-Burillo, Eduard Tornero-Dacasa, Manel Llusá-Pérez, Dragos Popescu, Andreu Combalia-Aleu, Sergi Sastre-Solsona
This article determines compartment opening of the medial articular space of the knee after pie crust (PC) technique of the medial collateral ligament (MCL) by ultrasound measurements and anatomic dissection. This is a cadaveric study of 12 specimens. Four anatomic references were marked on the skin. Distances between the femur and tibia in the internal compartment at 30 degrees of flexion were obtained with ultrasound measurements in four situations: with and without applying valgus force both prior and after the PC technique...
August 15, 2018: Journal of Knee Surgery
Sung-Hwan Kim, Sung-Jae Kim, Chong Hyuk Choi, Dohyun Kim, Min Jung
There has been no previous study using three-dimensional (3D) measurement on femoral tunnel characteristics according to the combined influence of various flexion angles of knee and transverse drill angles in single-bundle ACL reconstruction with transportal technique. The purpose of this study was to determine optimal condition of knee flexion angle and transverse drill angle to create secure femoral tunnel in single-bundle ACL reconstruction with transportal technique considering tunnel length, tunnel wall breakage, and graft bending angle...
2018: BioMed Research International
Céline Klein, Yassine Bulaid, François Deroussen, Marie-Christine Plancq, Camille Printemps, Richard Gouron
Congenital knee dislocation (CDK) is a rare condition, and its treatment is subject to debate. Here, we report on a new treatment for CDK (using a hexapod-type external fixator, HEF) in a three-year-old child with Larsen syndrome and grade III anterior dislocations of both knees. The left knee was treated with serial splints, whereas an HEF was used to treat an irreducible dislocation of the right knee. Two HEF aluminium rings were applied surgically. The procedure involved a distraction of the knee, then tibial posterior translation, and lastly progressive flexion...
August 12, 2018: Knee
Young-Ah Choi, Seong-Min Chun, Yale Kim, Hyung-Ik Shin
BACKGROUND: Lower extremity joint contractures have negative effects on gait in children with Duchenne muscular dystrophy (DMD). Thus, contracture prevention is essential for maintaining a patient's functional ability and an acceptable quality of life. This study investigated hip flexion (HF), knee flexion (KF), and ankle joint plantar flexion (APF) contractures among male patients with DMD, based on the patients' ambulatory status. Differences in major joint contractures, based on passive stretching exercise participation, were also investigated...
August 16, 2018: BMC Musculoskeletal Disorders
João P Duarte, João Valente-Dos-Santos, Manuel J Coelho-E-Silva, Pedro Couto, Daniela Costa, Diogo Martinho, André Seabra, Edilson S Cyrino, Jorge Conde, Joana Rosado, Rui S Gonçalves
The current study aimed to examine the reliability of the conventional and functional ratios derived from peak torques (PTs) and those obtained from the combination of knee flexors torque at the angle of knee extensors PT. Twenty-six male athletes (mean of 24.0±0.7 years) from different sports completed a test-to-test variation in isokinetic strength (Biodex, System 3) within a period of one week. Anthropometry and body composition assessed by Dual Energy X-ray Absorptiometry were also measured. The proposed isokinetic strength ratio measurements appeared to be highly reliable: conventional ratio at PT angle (intra-class correlation, ICC = 0...
2018: PloS One
Chris Richter, Edwenia O'Malley, Enda King, Siobhán Strike, Kieran Moran, Andrew Franklyn-Miller, Ray Moran
CONTEXT:   Despite an increase in the literature, few definitive guidelines are available to determine when an athlete been fully rehabilitated after anterior cruciate ligament reconstruction (ACLR). OBJECTIVE:   To examine countermovement jump and isokinetic dynamometry measures to (1) identify which measures can best distinguish between ACLR and control participants and (2) provide normative values for identified measures in young adult male multidirectional field-sport athletes...
August 15, 2018: Journal of Athletic Training
Fangzhou He, Chuanzhen Hu, Yuhui Shen, Qiyuan Bao, Junxiang Wen, Shijing Qiu, Rong Wan, Weibin Zhang
BACKGROUND: The proximal tibia is the second most common site of aggressive bone tumors. In proximal tibia resection, the patellar tendon is sectioned one to two centimeters from its insertion on the tibial tubercle, which makes it technically challenging to achieve an appropriate patellar height and firm fixation of the patellar tendon. The purpose of this study was to determine whether the patellar height influences knee function after proximal tibia endoprosthetic reconstruction (EPR)...
August 11, 2018: Knee
Diana Costa, Camila Cardoso Diogo, Luís Maltez da Costa, José Eduardo Pereira, Vítor Filipe, Pedro Alexandre Couto, Stefano Geuna, Paulo A Armada-Da-Silva, Ana Colette Maurício, Artur S P Varejão
Functional recovery following general nerve reconstruction is often associated with poor results. Comparing to rat and mice experimental studies, there are much fewer investigations on nerve regeneration and repair in the sheep, and there are no studies on this subject using gait analysis in the sheep model as an assessment tool. Additionally, this is the first study evaluating obstacle negotiation and the compensatory strategies that take place at each joint in response to the obstacle during locomotion in the sheep model...
August 14, 2018: Neurological Research
Huijuan Shi, Hongshi Huang, Yuanyuan Yu, Zixuan Liang, Si Zhang, Bing Yu, Hui Liu, Yingfang Ao
Individuals who received anterior cruciate ligament (ACL) reconstruction surgeries demonstrated lower extremity movement asymmetries. The purpose of this study was to determine if psychological impairment was a contributor to lower extremity movement asymmetries in walking for individuals who received ACL reconstruction surgeries. Three-dimensional videographic and force plate data were collected for 25 males after unilateral ACL reconstruction performing walking without (single-task condition) and with the concurrent cognitive task (dual-task condition)...
August 13, 2018: Scientific Reports
Hyun-Seung Rhyu, Hyun-Gu Han, Soung-Yob Rhi
Although many studies have focused on stretching techniques for athletes, no comprehensive studies have investigated the use of the instrument-assisted soft tissue mobilization (IASTM) technique in young basketball players. The active properties of muscle and subjective reporting of functional ability were used to identify the effects of IASTM on the calf muscle. Active range of motion (AROM), functional fitness, and isokinetic lower strength in the knees and ankles were measured in 40 healthy young basketball players...
July 28, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
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