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https://www.readbyqxmd.com/read/29351182/the-management-of-partial-zone-ii-intrasynovial-flexor-tendon-lacerations-a-literature-review-of-biomechanics-clinical-outcomes-and-complications
#1
Kyle D Lineberry, Shirley Shue, Kyle J Chepla
BACKGROUND: Penetrating trauma or lacerations within zone II of the flexor sheath may result in partial tendon injury. The proper management of this injury is controversial; the literature contains differing indications for surgical treatment and post-operative rehabilitation. METHODS: A literature review of the Cochrane, Medline and Pubmed databases was performed using the following search criteria: partial, flexor, tendon, laceration. All English language studies that evaluated biomechanical strength, complications, and outcomes after partial tendon injury in human and animal studies were included and reviewed by two of the authors...
January 12, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29349990/-experimentation-of-the-relationship-between-medial-or-lateral-patellar-stabilizer-and-patellofemoral-stabilization
#2
Xing-Sen Liang, Zheng-Hong Yu, Yi-Kai Li, Ying-Ping Jiang, Xian-Wu Chen, Min Huang
OBJECTIVE: To study the contribution of medial or lateral stabilizer to the stability of the patella, to explore the function and effect of releasing the LPR clinically and to provide a biomechanical basis for the clinical treatment of patellar instability(PI). METHODS: The quadriceps femoris of 6 fresh human cadaver knees were loaded to simulate a normal condition of muscle strength. First the loading force was measured and recorded, which subluxated the patella with the different degrees of knee flexion...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349964/-biomechanical-study-of-the-lateral-wall-of-the-femur-in-the-treatment-of-femoral-intertrochanteric-fracture-with-intramedullary-or-extramedullary-fixation
#3
Yin-Sheng Wu, Bing Xu, Zuo-Qu Yu, Xiao-Feng Wang, Shou-Wang Dai, Min Li, Pei-Jian Tong
OBJECTIVE: To observe the biomechanical effects of the lateral wall of the femur in treating femoral intertrochanteric fractures with intramedullary or extramedullary fixation to guide the choice of clinical fixed methods. METHODS: Twelve adults femur specimens of intertrochanteric fractures were belong to the type A1 of the AO fracture classification and randomly divided into the lateral wall complete PFNA group, the lateral wall complete PF-LCP group, the lateral wall breakage PFNA group, lateral wall breakage PF-LCP group, every group had 3 specimens...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349958/-biomechanical-analysis-of-the-correlation-between-sacral-tilt-displacement-and-l%C3%A2-s%C3%A2-disc-degeneration
#4
Ning-Ning Shi, Guo-Quan Shen, Shui-Yong He, Ru-Bao Gu, Shui-Yong He
OBJECTIVE: To biomechanical analysis of the correlation between sacral tilt displacement and L₅-S₁ disc degeneration. METHODS: From July 2011 to July 2013, 81 patients with lumbar disc herniation and sacroiliac joint disorder including 45 males and 36 females with an average age of (45.39±1.30) years ranging from 18 to 65 years old were selected. The course of the disease ranged from 1 to 144 months with an average of (12.64±2.19) months. All patients were taken lumbar spine lateral X-ray films, the lumbar curvature angle, L₄-L₅ or L₅-S₁ intervertebral gap distance between points, and the lumbosacral angle was measured and correlated analyzed...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349003/arthroscopic-anterior-shoulder-stabilization-with-incorporation-of-a-comminuted-bony-bankart-lesion
#5
Drew Lansdown, Eamon D Bernardoni, Eric J Cotter, Anthony A Romeo, Nikhil N Verma
Bony Bankart lesions are a common finding in patients with anterior glenohumeral dislocation. Although there are no defined guidelines, small bony Bankart fractures are typically treated arthroscopically with suture anchors. The 2 main techniques used are double- and single-row suture anchor stabilization, with debate over superiority. Biomechanical studies have shown improved reduction and stabilization with the double-row over the single-row suture anchor technique; however, this has not been reported for small or comminuted bony fragments...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29348998/meniscal-repair-with-fibrin-clot-augmentation
#6
Jorge Chahla, Nicholas I Kennedy, Andrew G Geeslin, Gilbert Moatshe, Mark E Cinque, Nicholas N DePhillipo, Robert F LaPrade
Meniscal injuries and meniscal loss are associated with changes in knee kinematics and loading, ultimately leading to poor functional outcomes and increased risk of progression to osteoarthritis. Biomechanical studies have shown restored knee function, and clinical studies have reported improved outcomes and decreased risk of osteoarthritis after meniscal repair. This has led orthopaedic surgeons to try and save the meniscus by repair whenever possible, as shown by increasing incidence of meniscal repair surgeries...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29346438/colonization-of-the-cervicovaginal-space-with-gardnerella-vaginalis-leads-to-local-inflammation-and-cervical-remodeling-in-pregnant-mice
#7
Luz-Jeannette Sierra, Amy G Brown, Guillermo O Barilá, Lauren Anton, Carrie E Barnum, Snehal S Shetye, Louis J Soslowsky, Michal A Elovitz
The role of the cervicovaginal (CV) microbiome in regulating cervical function during pregnancy is poorly understood. Gardnerella vaginalis (G. vaginalis) is the most common bacteria associated with the diagnosis of bacterial vaginosis (BV). While BV has been associated with preterm birth (PTB), clinical trials targeting BV do not decrease PTB rates. It remains unknown if G. vaginalis is capable of triggering molecular, biomechanical and cellular events that could lead to PTB. The objective of this study was to determine if cervicovaginal colonization with G...
2018: PloS One
https://www.readbyqxmd.com/read/29346158/biomechanical-response-to-osteoarthritis-pain-treatment-may-impair-long-term-efficacy
#8
Katherine A Boyer
Pain has an important physiologic role and acts with and/or stimulates motor system adaptations to protect tissue from threats of damage. While clinically beneficial, removing the protective pain response may have negative consequence in osteoarthritis, a mechanically-mediated disease. We hypothesize motor system adaptations to joint pain and its treatment may impact osteoarthritis progression thereby limiting efficacy of pain therapies.
January 15, 2018: Exercise and Sport Sciences Reviews
https://www.readbyqxmd.com/read/29345514/design-and-validation-of-an-instrumented-uneven-terrain-treadmill
#9
Alexandra S Voloshina, Daniel P Ferris
Studying human and animal locomotion on uneven terrain can be beneficial to basic science and applied studies for clinical and robotic applications. Traditional biomechanical analysis of human locomotion has often been limited to laboratory environments with flat, smooth runways and treadmills. We modified a regular exercise treadmill by attaching wooden blocks to the treadmill belt to yield an uneven locomotion surface. To ensure that these treadmill modifications facilitated biomechanical measurements, we compared ground reaction force data collected during running on the modified instrumented treadmill with a smooth surface to data collected using a conventional instrumented treadmill...
January 18, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29343719/the-significant-role-of-c-abl-kinase-in-barrier-altering-agonists-mediated-cytoskeletal-biomechanics
#10
X Wang, L Wang, J G N Garcia, S M Dudek, G S Shekhawat, V P Dravid
Exploration of human pulmonary artery endothelial cell (EC) as a prototypical biomechanical system has important pathophysiologic relevance because this cell type plays a key role in the development of a wide variety of clinical conditions. The complex hierarchical organization ranging from the molecular scale up to the cellular level has an intimate and intricate relationship to the barrier function between lung tissue and blood. To understand the innate molecule-cell-tissue relationship across varied length-scales, the functional role of c-Abl kinase in the cytoskeletal nano-biomechanics of ECs in response to barrier-altering agonists was investigated using atomic force microscopy...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343182/fibronectin-enhances-cartilage-repair-by-activating-progenitor-cells-through-integrin-%C3%A9-5%C3%AE-1-receptor
#11
Tianqi Tao, Yang Li, Chang Gui, Yong Ma, Yingbin Ge, Hanhao Dai, Kaibin Zhang, Jing Du, Yang Guo, Yiqiu Jiang, Jianchao Gui
This study aimed to determine the effect of fibronectin (FN) on cartilage regeneration through the activation of chondrogenic progenitor cells (CPCs). Cells were isolated from the knee cartilage of mice and cultured in the presence of various concentrations of FN. Proliferation, migration and chondrogenic differentiation assays were performed in vitro. In some experiments, CPCs were pre-incubated with anti-integrin ɑ5β1 antibody for 60 min prior to FN treatment to block the integrin ɑ5β1 receptor. Soluble FN was mixed with Pluronic F-127 and injected into the joint cavity in an early-stage osteoarthritis (OA) model...
January 18, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29342830/methods-to-improve-osseointegration-of-dental-implants-in-low-quality-type-iv-bone-an-overview
#12
REVIEW
Hamdan S Alghamdi
Nowadays, dental implants have become more common treatment for replacing missing teeth and aim to improve chewing efficiency, physical health, and esthetics. The favorable clinical performance of dental implants has been attributed to their firm osseointegration, as introduced by Brånemark in 1965. Although the survival rate of dental implants over a 10-year observation has been reported to be higher than 90% in totally edentulous jaws, the clinical outcome of implant treatment is challenged in compromised (bone) conditions, as are frequently present in elderly people...
January 13, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29340745/a-6-week-warm-up-injury-prevention-programme-results-in-minimal-biomechanical-changes-during-jump-landings-a-randomized-controlled-trial
#13
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
PURPOSE: To examine the extent to which an ACL injury prevention programme modifies lower extremity biomechanics during single- and double-leg landing tasks in both the sagittal and frontal plane. It was hypothesized that the training programme would elicit improvements in lower extremity biomechanics, but that these improvements would be greater during a double-leg sagittal plane landing task than tasks performed on a single leg or in the frontal plane. METHODS: Ninety-seven competitive multi-directional sport athletes that competed at the middle- or high-school level were cluster randomized into intervention (n = 48, age = 15...
January 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29339002/development-of-a-new-three-directional-distractor-system-for-the-correction-of-maxillary-transverse-and-sagittal-deficiency
#14
Canay Yılmaz Asan, Nükhet Kütük, Gökmen Kurt, Alper Alkan
PURPOSE: Class 3 malocclusions with maxillary deficiency, which are treated surgically and/or ordonotically, are common among adult patients. The aim of this study was to develop a three-directional bone-borne distractor that would allow the transverse expansion and sagittal advancement of the maxilla simultaneously. MATERIALS AND METHODS: Computed tomography images of a patient with maxillary deficiency were transmitted to a software program, and a distractor was designed with different sizes (D1, D2, D3) and manufactured from titanium alloy...
December 18, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29338541/diagnostic-accuracy-of-clinical-measures-considering-segmental-tissue-composition-and-volume-changes-of-breast-cancer-related-lymphedema
#15
Eun Joo Yang, Seoung Yeon Kim, Woo Hyung Lee, Jae-Young Lim, Jaebong Lee
BACKGROUND: If we use only volumetry for measuring lymphedema, we could underdiagnose lymphedema with characteristics of biomechanical changes without definite volume change, especially in the medial forearm. METHODS AND RESULTS: In total, 158 breast cancer patients participated in this study. Arm volume was measured by water displacement volumetry, and segmental volumes were calculated from circumferences by using the truncated cone method. Subcutaneous ultrasound echogenicities were assessed on the medial side of the upper arm and forearm of both arms and graded by subcutaneous echogenicity grade (SEG) and revised SEG (rSEG)...
January 17, 2018: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/29335759/bone-mediated-anteroinferior-glenohumeral-instability-current-concepts
#16
REVIEW
A Lädermann, E Böhm, E Tay, M Scheibel
Recurrent anterior shoulder instability is commonly associated with defects of the anterior glenoid rim. Substantial osseous defects significantly diminish the glenohumeral stability and require a bony augmentation, either by a coracoid transfer or free bone grafting procedure. Both reconstructive techniques have been applied for a long time and evaluated biomechanically and clinically. Although neither treatment option has been recognized as clearly superior, both comprise certain advantages and disadvantages...
January 15, 2018: Der Orthopäde
https://www.readbyqxmd.com/read/29335429/rfa-guardian-comprehensive-simulation-of-radiofrequency-ablation-treatment-of-liver-tumors
#17
Philip Voglreiter, Panchatcharam Mariappan, Mika Pollari, Ronan Flanagan, Roberto Blanco Sequeiros, Rupert Horst Portugaller, Jurgen Fütterer, Dieter Schmalstieg, Marina Kolesnik, Michael Moche
The RFA Guardian is a comprehensive application for high-performance patient-specific simulation of radiofrequency ablation of liver tumors. We address a wide range of usage scenarios. These include pre-interventional planning, sampling of the parameter space for uncertainty estimation, treatment evaluation and, in the worst case, failure analysis. The RFA Guardian is the first of its kind that exhibits sufficient performance for simulating treatment outcomes during the intervention. We achieve this by combining a large number of high-performance image processing, biomechanical simulation and visualization techniques into a generalized technical workflow...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29335093/changes-in-biomechanically-corrected-intraocular-pressure-and-dynamic-corneal-response-parameters-before-and-after-transepithelial-photorefractive-keratectomy-and-femtosecond-laser-assisted-laser-in%C3%A2-situ-keratomileusis
#18
Hun Lee, Cynthia J Roberts, Tae-Im Kim, Renato Ambrósio, Ahmed Elsheikh, David Sung Yong Kang
PURPOSE: To evaluate the changes in biomechanically corrected intraocular pressure (IOP) and new dynamic corneal response parameters measured by a dynamic Scheimpflug analyzer before and after transepithelial photorefractive keratectomy (PRK) and femtosecond laser-assisted laser in situ keratomileusis (LASIK). SETTING: Yonsei University College of Medicine and Eyereum Eye Clinic, Seoul, South Korea. DESIGN: Retrospective case series. METHODS: Medical records of patients having transepithelial PRK or femtosecond-assisted LASIK were examined...
December 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29332731/quantitative-tissue-parameters-of-achilles-tendon-and-plantar-fascia-in-healthy-subjects-using-a-handheld-myotonometer
#19
Sarah Orner, Wolfgang Kratzer, Julian Schmidberger, Beate Grüner
OBJECTIVE: The aim of the study was to examine the quantitative tissue properties of the Achilles tendon and plantar fascia using a handheld, non-invasive MyotonPRO device, in order to generate normal values and examine the biomechanical relationship of both structures. DESIGN: Prospective study of a large, healthy sample population. PARTICIPANTS: The study sample included 207 healthy subjects (87 males and 120 females) for the Achilles tendon and 176 healthy subjects (73 males and 103 females) for the plantar fascia...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332226/monocortical-fixation-of-the-coracoid-in-the-latarjet-procedure-is-significantly-weaker-than-bicortical-fixation
#20
Uli Schmiddem, Nael Hawi, Emmanouil Liodakis, Antonios Dratzidis, Manuel Kraemer, Christof Hurschler, Richard Page, Rupert Meller
PURPOSE: A crucial step of the Latarjet procedure is the fixation of the coracoid process onto the glenoid. Multiple problems associated with the fixation have been described, including lesions of the suprascapular nerve due to prominence of the screw or bicortical drilling. The purpose of the present study was to evaluate whether monocortical fixation, without perforating the posterior glenoid cortex, would provide sufficient graft stability. METHODS: Coracoid transfer was performed in 14 scapula models (Sawbones®, Composite Scapula, 4th generation)...
January 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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