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https://www.readbyqxmd.com/read/29154692/landing-kinematics-and-kinetics-at-the-knee-during-different-landing-tasks
#1
Nicholas R Heebner, Deirdre M Rafferty, Meleesa F Wohleber, Andrew J Simonson, Mita Lovalekar, Andrew Reinert, Timothy C Sell
CONTEXT:   Several tasks have been used to examine landing biomechanics for evaluation and rehabilitation, especially as related to anterior cruciate ligament injuries. However, comparing results among studies in which different tasks were used can be difficult, and it is unclear which task may be most appropriate. OBJECTIVE:   To compare lower extremity biomechanics across 5 commonly used landing tasks. DESIGN:   Descriptive laboratory study...
November 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29154402/transvaginal-ultrasound-tvs-versus-magnetic-resonance-mr-for-diagnosing-deep-infiltrating-endometriosis-a-systematic-review-and-meta-analysis
#2
REVIEW
S Guerriero, L Saba, M A Pascual, S Ajossa, I Rodriguez, V Mais, J L Alcazar
OBJECTIVES: To perform a systematic review of studies comparing the diagnostic accuracy of TVS and MRI in Deep Infiltrating Endometriosis (DIE) including only studies in which patients have been underwent both techniques. METHODS: An extensive search of papers comparing TVS and MRI in DIE was performed in Medline (Pubmed) and Web of Sciences from January 1989 to January 2016. Studies were considered eligible if they reported on the use of TVS and MRI in the same set of patients for the preoperative detection of endometriosis in pelvic locations in women with clinical suspicion of DIE using the surgical data as a reference standard...
November 20, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29154263/the-effectiveness-of-proprioceptive-and-neuromuscular-training-compared-to-bracing-in-reducing-the-recurrence-rate-of-ankle-sprains-in-athletes-a-systematic-review-and-meta-analysis
#3
M Burger, D Dreyer, R L Fisher, D Foot, D H O'connor, M Galante, S Zalgaonkir
BACKGROUND: Ankle sprains are common musculoskeletal injuries in which the ligaments of the ankle partially or completely tear due to sudden stretching. OBJECTIVES: To critically appraise, evaluate and establish the best available evidence to determine the effectiveness of proprioceptive and neuromuscular training (PNT) compared to bracing in reducing the recurrence rate of ankle sprains in athletes. METHODOLOGY: The following seven databases were searched in June 2017: PubMed, Cochrane Library, PEDro, ScienceDirect, Scopus, SPORTDiscus, EBSCO Host: CINAHL...
November 10, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29153720/hierarchical-nanoporous-platinum-copper-alloy-nanoflowers-as-highly-active-catalysts-for-the-hydrolytic-dehydrogenation-of-ammonia-borane
#4
Qiuxia Zhou, Lei Qi, Hongxiao Yang, Caixia Xu
Hierarchical nanoporous platinum-copper (hnp-PtCu) alloy nanoflowers with bimodal pore/ligament size are easily fabricated by selectively dissolving Al atoms and part of Cu atoms from PtCuAl ternary alloy. The dealloyed samples consist of cross-linking porous nanoflowers with interconnected network skeleton and hollow channels penetrated. Hnp-PtCu alloy nanoflowers with different compositions exhibit dramatically enhanced catalytic activities toward the hydrolysis of ammonia borane (AB) compared with their monometallic components...
November 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29153706/load-sharing-in-the-lumbosacral-spine-in-neutral-standing-flexed-postures-a-combined-finite-element-and-inverse-static-study
#5
Tao Liu, Kinda Khalaf, Sadegh Naserkhaki, Marwan El-Rich
Understanding load-sharing in the spine during in-vivo conditions is critical for better spinal implant design and testing. Previous studies of load-sharing that considered actual spinal geometry applied compressive follower load, with or without moment, to simulate muscle forces. Other studies used musculoskeletal models, which include muscle forces, but model the discs by simple beams or spherical joints and ignore the articular facet joints. This study investigated load-sharing in neutral standing and flexed postures using a detailed Finite Element (FE) model of the ligamentous lumbosacral spine, where muscle forces, gravity loads and intra-abdominal pressure, as predicted by a musculoskeletal model of the upper body, are input into the FE model...
November 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29152645/mir-214-promotes-periodontal-ligament-stem-cell-osteoblastic-differentiation-by-modulating-wnt-%C3%AE-%C3%A2-catenin-signaling
#6
Fengdi Cao, Jialin Zhan, Xufeng Chen, Kai Zhang, Renfa Lai, Zhiqiang Feng
The canonical Wnt/β‑catenin signaling is important in the differentiation of human mesenchymal stem cells into osteoblasts. Accumulating evidence suggests that the expression of β‑catenin is, in part, regulated by specific microRNAs (miRNAs). The aim of the present study was to investigate the putative roles of miRNAs in osteoblast differentiation. Polymerase chain reaction (PCR) arrays were used to identify miRNAs that were differentially expressed between differentiated and non‑differentiated periodontal ligament stem cells (PDLSCs), and reverse transcription‑quantitative PCR (RT‑qPCR) was used for validation...
October 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29152522/bone-patellar-tendon-bone-versus-hamstring-tendon-autografts-for-primary-anterior-cruciate-ligament-reconstruction-a-systematic-review-of-overlapping-meta-analyses
#7
REVIEW
Hayden B Schuette, Matthew J Kraeutler, Darby A Houck, Eric C McCarty
Background: Previous meta-analyses have compared bone-patellar tendon-bone (BPTB) with hamstring tendon (HT) autografts for primary anterior cruciate ligament reconstruction (ACLR). Purpose: To conduct a systematic review of overlapping meta-analyses comparing BPTB with HT autografts for ACLR to determine which meta-analyses provide the best available evidence. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review was performed by searching the PubMed and Cochrane Library databases...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29152521/isokinetic-strength-deficit-6-months-after-adductor-canal-blockade-for-anterior-cruciate-ligament-reconstruction
#8
James E Christensen, Natalie E Taylor, Scott J Hetzel, John A Shepler, Tamara A Scerpella
Background: Recent evidence shows a delayed return to sport in children and delayed quadriceps recovery in both adults and children who have undergone anterior cruciate ligament (ACL) reconstruction with concomitant femoral nerve blockade (FNB) compared with those who had no blockade. We evaluated the use of adductor canal blockade (ACB), as an alternative to FNB, at the time of ACL reconstruction. Hypothesis: Patients who receive ACB will have greater isokinetic strength at 6 months postoperative compared with patients who receive FNB at the time of ACL reconstruction...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29152439/anterior-cruciate-ligament-ganglion-cyst-and-mucoid-degeneration-a-review
#9
REVIEW
Raju Vaishya, Abdulrazaq Esin Issa, Amit Kumar Agarwal, Vipul Vijay
Mucoid degeneration and ganglion cyst are two distinct non-traumatic lesions of the anterior cruciate ligament (ACL) that most commonly occur discretely but occasionally coexist. They are relatively uncommon, and their exact aetiopathogenesis is still not clear. ACL ganglion cyst occurs more frequently among relatively younger patients compared to mucoid degeneration. They could be asymptomatic and discovered incidentally while evaluating the knee for other pathologies. Symptomatic cases of the two conditions present with nonspecific chronic pain, painful limitation of terminal flexion and extension, and mechanical block (among other symptoms), similar to that of other internal derangement pathologies of the knee...
September 13, 2017: Curēus
https://www.readbyqxmd.com/read/29151023/quadriceps-force-and-anterior-tibial-force-occur-obviously-later-than-vertical-ground-reaction-force-a-simulation-study
#10
Ryo Ueno, Tomoya Ishida, Masanori Yamanaka, Shohei Taniguchi, Ryohei Ikuta, Mina Samukawa, Hiroshi Saito, Harukazu Tohyama
BACKGROUND: Although it is well known that quadriceps force generates anterior tibial force, it has been unclear whether quadriceps force causes great anterior tibial force during the early phase of a landing task. The purpose of the present study was to examine whether the quadriceps force induced great anterior tibial force during the early phase of a landing task. METHODS: Fourteen young, healthy, female subjects performed a single-leg landing task. Muscle force and anterior tibial force were estimated from motion capture data and synchronized force data from the force plate...
November 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29151015/diffuse-idiopathic-skeletal-hyperostosis-dish-as-a-cause-of-failure-following-distal-clavicle-excision-a-case-report-and-review-of-the-literature
#11
John Begly, Vineet Tyagi, Eric Strauss
Diffuse idiopathic skeletal hyperostosis (DISH) is common spinal condition characterized by increased calcification and ossification of ligaments and entheses, typically in the anterior aspect of the spine. However, extraspinal manifestations of the disease can occur and depending on the degree and location of involvement, may become symptomatic. We present the case of a 63-year-old male with a history of DISH, who failed initial open distal clavicle excision due to the postoperative development of heterotopic bone bridging across the acromioclavicular joint...
December 2017: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/29150664/histological-evidence-for-a-dynamic-dental-battery-in-hadrosaurid-dinosaurs
#12
Katherine Bramble, Aaron R H LeBlanc, Denis O Lamoureux, Mateusz Wosik, Philip J Currie
The first histological study of an entire hadrosaurid dental battery provides a comprehensive look at tooth movement within this complex structure. Previous studies have focused on isolated teeth, or in-situ batteries, but this is the first study to examine an entire dental battery of any dinosaur. The absence of direct tooth-to-tooth contact across the entire battery and a unique arrangement of the dental tissues in hadrosaurids led us to compare their teeth with the ever-growing incisors of mammals. The similarity in the distributions of tissues along the incisor, coupled with continuous eruption, make for helpful comparisons to hadrosaurid teeth...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150365/correlation-between-ultrasound-appearance-of-small-breast-cancer-and-axillary-lymph-node-metastasis
#13
Xiaoqin Yu, Xiaoyan Hao, Jing Wan, Yingying Wang, Lan Yu, Binyue Liu
To study the correlation of ultrasonographic signs of small breast cancer (maximum diameter ≤2.0 cm) with axillary lymph node metastasis, pre-operative ultrasonographic images of 153 small breast malignant neoplasms in 143 breast cancer patients were analyzed according to their pathologic features. Of the small breast tumors included, 47 showed axillary lymph node metastasis. Diagnosis of all patients was obtained with radical axillary surgery or a sentinel lymph node biopsy procedure. Ultrasonographic signs included irregular shape, microlobulated contour, spiculation, microcalcification, posterior echo attenuation, blood-flow grade, perforating vessels, changes in fascia or cooper's ligament and maximum cortical thickness of lymph nodes...
November 14, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29149741/the-isolated-posterior-malleolar-fracture-and-syndesmotic-instability-a-case-report-and-review-of-the-literature
#14
Diederik P J Smeeing, Roderick M Houwert, Moyo C Kruyt, Falco Hietbrink
INTRODUCTION: Ankle fractures are among the most common type of fractures in the lower extremity. A posterior malleolar fracture is frequently part of a more complex ankle fracture and only in rare cases it occurs as isolated injury. Posterior malleolar fractures often occur with associated injuries, such as a Maisonneuve fracture or with bi- or trimalleolar ligamentous injuries. Knowledge about these associated injuries is essential to prevent missed diagnoses. The aim of this article is to describe the isolated posterior malleolar fracture, the possible associated injuries, the diagnostic work-up and therapeutic consequences...
November 13, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29149622/the-chemokine-receptor-type-4-antagonist-amd3100-interrupts-experimental-tooth-movement-in-rats
#15
Kasumi Hatano, Yuji Ishida, Hiroyuki Yamaguchi, Jun Hosomichi, Jun-Ichi Suzuki, Risa Usumi-Fujita, Yasuhiro Shimizu, Naoki Shibutani, Sawa Kaneko, Takashi Ono
OBJECTIVE: The aim of this study was to clarify the role of the stromal cell-derived factor-1 (SDF-1)/C-X-C chemokine receptor type 4 (CXCR4) axis in osteoclast accumulation, and the influence of orthodontic tooth movement (OTM) under mechanical force application to periodontal tissues, by administration of the CXCR4 antagonist AMD3100. DESIGN: The upper right first molar (M1) of rats was moved mesially with a 10-g force titanium-nickel closed coil spring. Rats were treated with phosphate-buffered saline or AMD3100 (5mg/kg), which is a SDF-1 antagonist...
November 11, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29149506/integrating-soft-and-hard-tissues-via-interface-tissue-engineering
#16
REVIEW
Sahishnu Patel, Jon-Michael Caldwell, Stephen B Doty, William N Levine, Scott Rodeo, Louis J Soslowsky, Stavros Thomopoulos, Helen H Lu
The enthesis, or interface between bone and soft tissues such as ligament and tendon, is prone to injury and often does not heal post-surgical intervention. Interface tissue engineering represents an integrative strategy for regenerating the native enthesis by functionally connecting soft and hard tissues and thereby improving clinical outcome. This review focuses on integrative and cell-instructive scaffold designs that target the healing of the two most commonly injured soft tissue-bone junctions: the tendon-bone interface (e...
November 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29147681/crimped-nanofibrous-biomaterials-mimic-microstructure-and-mechanics-of-native-tissue-and-alter-strain-transfer-to-cells
#17
Spencer E Szczesny, Tristan P Driscoll, Hsiao-Yun Tseng, Pang-Ching Liu, Su-Jin Heo, Robert L Mauck, Pen-Hsiu G Chao
To fully recapitulate tissue microstructure and mechanics, fiber crimping must exist within biomaterials used for tendon/ligament engineering. Existing crimped nanofibrous scaffolds produced via electrospinning are dense materials that prevent cellular infiltration into the scaffold interior. In this study, we used a sacrificial fiber population to increase the scaffold porosity and evaluated the effect on fiber crimping. We found that increasing scaffold porosity increased fiber crimping and ensured that the fibers properly uncrimped as the scaffolds were stretched by minimizing fiber-fiber interactions...
November 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29147670/isokinetic-extension-strength-is-associated-with-single-leg-vertical-jump-height
#18
Felix Fischer, Cornelia Blank, Tobias Dünnwald, Peter Gföller, Elmar Herbst, Christian Hoser, Christian Fink
Background: Isokinetic strength testing is an important tool in the evaluation of the physical capacities of athletes as well as for decision making regarding return to sports after anterior cruciate ligament (ACL) reconstruction in both athletes and the lay population. However, isokinetic testing is time consuming and requires special testing equipment. Hypothesis: A single-jump test, regardless of leg dominance, may provide information regarding knee extension strength through the use of correlation analysis of jump height and peak torque of isokinetic muscle strength...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29146508/biomechanical-analysis-of-palmar-midcarpal-instability-and-treatment-by-partial-wrist-arthrodesis
#19
Sarah A Shiga, Frederick W Werner, Marc Garcia-Elias, Brian J Harley
PURPOSE: To create a biomechanical model of palmar midcarpal instability by selective ligament sectioning and to analyze treatment by simulated partial wrist arthrodesis. METHODS: Nine fresh-frozen cadaver arms were moved through 3 servohydraulic actuated motions and 2 passive wrist mobilizations. The dorsal radiocarpal, triquetrohamate, scaphocapitate, and scaphotrapeziotrapezoid ligaments were sectioned to replicate palmar midcarpal instability. Kinematic data for the scaphoid, lunate, and triquetrum were recorded before and after ligament sectioning and again after simulated triquetrohamate arthrodesis (TqHA) and radiolunate arthrodesis (RLA)...
November 14, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29146506/silicone-metacarpophalangeal-arthroplasty-for-osteoarthritis-long-term-results
#20
Nathan T Morrell, Arnold-Peter C Weiss
PURPOSE: To demonstrate that silicone metacarpophalangeal (MCP) arthroplasty provides excellent long-term outcomes with a low complication rate in osteoarthritis patients. METHODS: A consecutive cohort of 35 patients with osteoarthritis of 1 or more MCP joints undergoing anatomically neutral silicone MCP arthroplasty was followed over a 15-year period. Functional outcomes including strength and range of motion (ROM), as well as complications, were recorded. All patients were available for long-term assessment including radiographs and outcomes questionnaire...
November 14, 2017: Journal of Hand Surgery
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