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knee joint

P Maxwell Courtney, David C Markel
With renewed focus on achieving value for patients in total hip and knee arthroplasty, payors, hospitals, and physicians strive to provide quality care while minimizing cost. Large registry datasets have gained popularity in the United States to track implant survivorship and outcomes after joint replacement. Partnerships among surgeons, insurers, and health systems have improved on earlier administrative datasets from Medicare to measure quality and outcomes. Participation in state and national registries can help surgeons and hospitals gain a financial advantage in several insurers' quality programs and alternative payment models...
October 24, 2016: Journal of Knee Surgery
André P Boezaart, Hari K Parvataneni
No abstract text is available yet for this article.
November 2016: Regional Anesthesia and Pain Medicine
F Franceschi, S Togni, G Belcaro, M Dugall, R Luzzi, A Ledda, L Pellegrini, R Eggenhoffner, L Giacomelli
OBJECTIVE: Several experimental studies and clinical trials support the potential of Boswellia serrata extracts (BSE) for the treatment of various inflammatory diseases. The aim of this registry study was to assess the safety and the efficacy of a novel lecithin-based delivery form of Boswellia serrata extract (Casperome®) in the supportive management of osteo-muscular pain. PATIENTS AND METHODS: 52 healthy young rugby players with acute knee pain and inflammation were recruited...
October 2016: European Review for Medical and Pharmacological Sciences
Janie L Astephen Wilson, William D Stanish, Cheryl L Hubley-Kozey
There is an established discordance between the structural joint damage and clinical symptoms of knee osteoarthritis; however, there has been little investigation into the differences in joint level biomechanics and muscle activation patterns during gait between symptomatic and asymptomatic individuals with the same radiographic evidence of osteoarthritis. The objective of this study was to examine three-dimensional knee joint biomechanics and muscle activation differences during gait between asymptomatic and symptomatic individuals with radiographic knee osteoarthritis...
October 24, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Tomokazu Yoshioka, Hisashi Sugaya, Shigeki Kubota, Mio Onishi, Akihiro Kanamori, Yoshiyuki Sankai, Masashi Yamazaki
The knee range of motion is an important outcome of total knee arthroplasty (TKA). According to previous studies, the knee range of motion temporarily decreases for approximately 1 month after TKA due to postoperative pain and quadriceps dysfunction following surgical invasion into the knee extensor mechanism. We describe our experience with a knee-extension training program based on a single-joint hybrid assistive limb (HAL-SJ, Cyberdyne Inc., Tsukuba, Japan) during the acute recovery phase after TKA. HAL-SJ is a wearable robot suit that facilitates the voluntary control of knee joint motion...
2016: Case Reports in Orthopedics
Jun Suganuma, Tadashi Sugiki, Yutaka Inoue
We report a case of bilateral, permanent subluxation of the lateral meniscus. To our knowledge, the present case is the first reported description of bilateral irreducible anterior dislocation of the posterior segment of the lateral meniscus. This disorder is characterized by a flipped meniscus sign of the lateral meniscus on sagittal magnetic resonance images of the knee joint, with no history of trauma or locking symptoms. A detailed examination of serial magnetic resonance images of the lateral meniscus can help differentiate this condition from malformation of the lateral meniscus, that is, a double-layered meniscus...
2016: Case Reports in Orthopedics
Jesse V Jacobs, Carrie L Roy, Juvena R Hitt, Roman E Popov, Sharon M Henry
This study sought to determine the effects of chronic low back pain (LBP) on the cortical evoked potentials, muscle activation, and kinematics of postural responses to perturbations of standing balance. Thirteen subjects with chronic, recurrent, non-specific LBP and 13 subjects without LBP participated. The subjects responded to unpredictably timed postural perturbations while standing on a platform that randomly rotated either "toes up" or "toes down". Electroencephalography (EEG) was used to calculate the negative peak (N1) and subsequent positive peak (P2) amplitudes of the perturbation evoked cortical potentials...
October 19, 2016: Neuroscience
Marco Galli, Emanuele Marzetti
OBJECTIVES: To determine the overall diagnostic accuracy of the McMurray and Joint Line Tenderness (JLT) tests for the detection of meniscal lesions. DESIGN: Secondary analysis of a prospective observational study. SETTING: Orthopedics outpatient clinic, university hospital. PARTICIPANTS: Patients (n=56) with suspected non-acute meniscal lesions who underwent knee arthroscopy. INTERVENTIONS: Not applicable...
October 19, 2016: Archives of Physical Medicine and Rehabilitation
Rita Nely Vilar Furtado, Flávia Soares Machado, Karine Rodrigues da Luz, Marla Francisca Dos Santos, Monique Sayuri Konai, Roberta Vilela Lopes, Jamil Natour
OBJECTIVES: To evaluate local joint variables after intra-articular injection (IAI) with triamcinolone hexacetonide (HT) in rheumatoid arthritis (RA) patients. METHODS: We blindly and prospectively (baseline, 1, 4, 12 and 24 weeks) evaluated metacarpophalangeal (MCP), wrist, elbow, shoulder, knee and ankle joints after HT IAI by the following outcome measures: Visual analogue scale 0-10cm (VAS) for rest pain (VASR); VAS for movement pain (VASM); VAS for joint swelling (VASSw); flexion (FlexG) and extension (ExtG)...
August 18, 2016: Revista Brasileira de Reumatologia
Daniel J Southwell, Shane A Petersen, Tyson A C Beach, Ryan B Graham
Altering footwear worn during performance of the barbell back squat has been shown to change motion patterns, but it is not completely understood how this affects biomechanical loading demands. The primary objective was to compare lower back and extremity net joint moments in 24 experienced weightlifters (12M, 12F) who performed 80% one-repetition maximum back squats under three different footwear conditions (barefoot, running shoes, weightlifting shoes). Results showed that there was a significant main effect of footwear condition on the knee extension moment (p=0...
October 12, 2016: Journal of Electromyography and Kinesiology
Allison L Clouthier, Eric R Bohm, John F Rudan, Barbara L Shay, Michael J Rainbow, Kevin J Deluzio
Multicentre studies are rare in three dimensional motion analyses due to challenges associated with combining waveform data from different centres. Principal component analysis (PCA) is a statistical technique that can be used to quantify variability in waveform data and identify group differences. A correction technique based on PCA is proposed that can be used in post processing to remove nuisance variation introduced by the differences between centres. Using this technique, the waveform bias that exists between the two datasets is corrected such that the means agree...
October 13, 2016: Gait & Posture
Shanyuanye Guan, Hans A Gray, Anthony G Schache, Julian Feller, Richard de Steiger, Marcus G Pandy
No data are available to describe six-degree-of-freedom (6-DOF) knee-joint kinematics for one complete cycle of overground walking subsequent to total knee arthroplasty (TKA). The aims of this study were firstly, to measure 6-DOF knee-joint kinematics and condylar motion for overground walking following TKA; and secondly, to determine whether such data differed between overground and treadmill gait when participants walked at the same speed during both tasks. A unique mobile biplane X-ray imaging system enabled accurate measurement of 6-DOF TKA knee kinematics during overground walking by simultaneously tracking and imaging the joint...
October 22, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Vajara Wilairatana, Peerasit Sinlapavilawan, Sittisak Honsawek, Noppachart Limpaphayom
BACKGROUND: The aim was to compare serum levels of interleukin-6 (SIL6), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and joint fluid IL-6 (JIL-6) level between total knee arthroplasty (TKA) that used bone cement (BC group) and antibiotic-loaded bone cement (ALBC group). MATERIALS AND METHODS: Thirty-nine patients (40 TKAs) with a mean age of 69.6 years were non-randomly assigned to the BC or ALBC groups. Samples of SIL6, ESR, and CRP were collected at baseline and at 24 h, 72 h, and 4 weeks after surgery...
October 21, 2016: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
William T Obremskey, Norele Cutrera, Christopher M Kidd
BACKGROUND: The purpose of this study was to determine optimal treatment of stable tibial shaft fractures using intramedullary nailing (IMN) or casting. MATERIALS AND METHODS: We performed a multi-center prospective study cohort. Patients with stable tibia shaft fractures meeting Sarmiento's criteria (isolated closed fractures with less than 12 mm of shortening and 10° of angulation) were enrolled prospectively and treated with either a reamed IMN with static interlocking screws or closed reduction followed by long-leg casting...
October 21, 2016: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
A Achtnich, S Rosslenbroich, K Beitzel, A B Imhoff, W Petersen
OBJECTIVE: Arthroscopic assisted suture anchor refixation combined with microfracturing of the femoral ACL insertion zone in cases of acute proximal anterior cruciate ligament (ACL) rupture to restore anatomical and biomechanical properties of the native ACL. INDICATIONS: Acute proximal ACL rupture/avulsion, multiligament injury of the knee CONTRAINDICATIONS: Chronic (>6 weeks) proximal ACL rupture, intraligamentary rupture, as well as previous ACL surgery. SURGICAL TECHNIQUE: Arthroscopic examination of the knee joint, debridement of the femoral insertion zone, examination of the ligament quality by a probe, insertion of a curved lasso through the ACL to place the sutures and use of a drill guide to place the anchor in the middle of the femoral ACL insertion...
October 21, 2016: Operative Orthopädie und Traumatologie
Laura Prieto-Borja, Graciela Rodriguez-Sevilla, Alvaro Auñon, Concepción Pérez-Jorge, Enrique Sandoval, Joaquín Garcia-Cañete, Ignacio Gadea, Ricardo Fernandez-Roblas, Antonio Blanco, Jaime Esteban
BACKGROUND: The development of sonication protocols over the last few years has improved the sensitivity of conventional cultures for the diagnosis of prosthetic-joint infection (PJI). However, the development of a new, specifically designed kit for the molecular diagnosis of PJI could provide a major improvement in this field. METHODS: Prostheses retrieved from patients who underwent implant removal from May 2014 to May 2015 were sent for culture, and processed according to a previously defined protocol that included sonication...
October 18, 2016: Enfermedades Infecciosas y Microbiología Clínica
Arin M Ellingson, Joseph D Mozingo, Dixon J Magnuson, Mark W Pagnano, Kristin D Zhao
Fluoroscopic imaging has become increasingly popular to investigate total knee arthroplasty kinematics non-invasively - 3D implant models are aligned with 2D image projections, and optimized via an edge-contour alignment technique. Previous studies have quantified the accuracy of this approach, however they do not always adequately address the impact of image collection parameters. A particularly sensitive parameter is the pulse width, or exposure time per frame. At longer pulse widths, more motion is captured in a single frame; this can lead to image blur and subsequent degradation to image edge quality...
October 11, 2016: Journal of Biomechanics
Xiaodan Yu, Hiroko Kawakami, Naoyuki Tahara, Merissa Olmer, Shinichi Hayashi, Ryutaro Akiyama, Anindya Bagchi, Martin Lotz, Yasuhiko Kawakami
Increasing evidence supports the idea that bone morphogenetic proteins (BMPs) regulate cartilage maintenance in the adult skeleton. The aim of this study is to obtain insight into the regulation of BMP activities in the adult skeletal system. We analyzed expression of Noggin and Gremlin1, BMP antagonists that are known to regulate embryonic skeletal development, in the adult skeletal system by Noggin-LacZ and Gremlin1-LacZ knockin reporter mouse lines. Both reporters are expressed in the adult skeleton in a largely overlapping manner with some distinct patterns...
October 21, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Lindsay V Slater, Joseph M Hart
The squat is an assessment of lower extremity alignment during movement, however there is little information regarding altered joint kinetics during poorly performed squats. The purpose of this study was to examine changes in joint kinetics and power from altered knee alignment during a squat. Thirty participants completed squats while displacing the knee medially, anteriorly, and with neutral alignment (control). Sagittal and frontal plane torques at the ankle, knee, and hip were altered in the descending and ascending phase of the squat in both the medial and anterior malaligned squat compared to the control squat...
October 12, 2016: Journal of Electromyography and Kinesiology
Norachart Sirisreetreerux, Babar Shafiq, Greg M Osgood, Erik A Hasenboehler
OBJECTIVES: To determine the location of distal medial neurovascular structures, identifying a medial "safe zone" for minimally invasive plate osteosynthesis to treat displaced femoral condylar fractures. METHODS: Eleven uninjured lower-half torsos were dissected on the bilateral medial lower thigh. A longitudinal incision was made at the midsagittal plane of the medial thigh starting 1 cm proximal to the knee joint and extending to the proximal one-third of the femur...
November 2016: Journal of Orthopaedic Trauma
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