keyword
https://read.qxmd.com/read/38492869/editorial-commentary-shoulder-superior-capsular-reconstruction-has-a-high-complication-rate-whereas-reverse-total-shoulder-arthroplasty-results-in-improved-motion-strength-and-return-to-play
#1
EDITORIAL
Phob Ganokroj, Ryan J Whalen, Matthew T Provencher
Superior capsular reconstruction (SCR) was developed to restore patient biomechanics for patients with massive irreparable rotator cuff repair (MIRCT) that precludes shoulder arthroplasty. Current studies have shown excellent short-term clinical outcomes and improved pain and functional scores, a high complication rate including re-tear, loss of fixation, or incomplete healing. An alternative, reverse total shoulder arthroplasty (rTSA) is a reliable and safe method to ensure good muscle strength and return to play in this patient group...
March 14, 2024: Arthroscopy
https://read.qxmd.com/read/38490072/quadriceps-composition-and-function-influence-downhill-gait-biomechanics-1%C3%A2-year-following-anterior-cruciate-ligament-reconstruction
#2
JOURNAL ARTICLE
Alex Nilius, Derek R Dewig, Christopher D Johnston, Brian G Pietrosimone, J Troy Blackburn
BACKGROUND: Quadriceps dysfunction is common following anterior cruciate ligament reconstruction and contributes to aberrant gait biomechanics. Changes in quadriceps composition also occur in these patients including greater concentrations of non-contractile tissue. The purpose of this study was to evaluate associations between quadriceps composition, function, and gait biomechanics in individuals with anterior cruciate ligament reconstruction. METHODS: Forty-eight volunteers with anterior cruciate ligament reconstruction completed gait biomechanics and quadriceps function and composition assessments...
March 12, 2024: Clinical Biomechanics
https://read.qxmd.com/read/38489669/multistrand-twisted-triboelectric-kevlar-yarns-for-harvesting-high-impact-energy-body-injury-location-and-levels-evaluation
#3
JOURNAL ARTICLE
Fangjing Xing, Xiaobo Gao, Jing Wen, Hao Li, Hui Liu, Zhong Lin Wang, Baodong Chen
Developing ultrahigh-strength fabric-based triboelectric nanogenerators for harvesting high-impact energy and sensing biomechanical signals is still a great challenge. Here, the constraints are addressed by design of a multistrand twisted triboelectric Kevlar (MTTK) yarn using conductive and non-conductive Kevlar fibers. Manufactured using a multistrand twisting process, the MTTK yarn offers superior tensile strength (372 MPa), compared to current triboelectric yarns. In addition, a self-powered impact sensing fabric patch (SP-ISFP) comprising signal acquisition, processing, communication circuit, and MTTK yarns is integrated...
March 15, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38489659/effect-of-strength-and-plyometric-training-on-kinematics-in-female-novice-runners
#4
JOURNAL ARTICLE
Kathryn Harrison, Dorsey S Blaise Williams, Benjamin J Darter, Ronald F Zernicke, Mary Shall, Sheryl Finucane
Harrison, K, Williams, DSB III, Darter, BJ, Zernicke, RF, Shall, M, and Finucane, S. Effect of strength and plyometric training on kinematics in female novice runners. J Strength Cond Res XX(X): 000-000, 2024-Both running performance and injury have been associated with running kinematics. Plyometric training improves run performance and reduces injury risk in court-sport and field-sport athletes. The aim of this study was to assess longitudinal changes in kinematics in novice runners before and after a typical beginners' running program, compared with those who perform a plyometric intervention before running...
March 14, 2024: Journal of Strength and Conditioning Research
https://read.qxmd.com/read/38488600/biomechanical-analysis-of-tendon-turnover-tenorrhaphy-compared-to-direct-repair-and-pulvertaft-weave
#5
JOURNAL ARTICLE
Anthony Barabas, Manal I A Patel, Michael Sutcliffe
The aim of the present study was to evaluate biomechanical properties of tendon turnover repair in comparison to direct repair and Pulvertaft weave. A total of 48 sheep flexor tendons were assigned to eight groups comprising single or double tendon turnover repair, tendon turnover segment (without tenorrhaphy), direct repair or Pulvertaft weave. Tensile strength, stiffness and failure mechanisms were evaluated with a 500 N load cell. Turnover repair showed no significant difference in tensile strength to direct repair...
March 15, 2024: Journal of Hand Surgery, European Volume
https://read.qxmd.com/read/38488249/evaluation-of-microstructure-evolution-and-mechanical-properties-of-al-10zn-1-63si-irvingia-gabonensis-particulates-alloy-composites
#6
JOURNAL ARTICLE
Chukwuneke Jeremiah Lekwuwa, Sinebe Jude Ebieladoh, Umahi Justice Chidi, Nnakwo Kingsley Chidi, Olisakwe Henry Chukwuemeka
This study demonstrates the feasibility of using Irvingia gabonensis shell particulates (IGSp) as alternative reinforcing materials in the development of aluminium-based composites. In this experimental study, the microstructure, phase composition, and mechanical behaviour of Al-10Zn-1.63Si/xIGSp (wt%, x = 1, 3, 5 and 7) composites were investigated. The Al-10Zn-1.63Si based composites were fabricated using the stir-casting technique. Different weight percentages (1, 3, 5 and 7) of IGSp were added to the Al-10Zn-1...
2024: Journal of Applied Biomaterials & Functional Materials
https://read.qxmd.com/read/38488237/information-videos-posted-on-instagram-by-orthopaedics-and-sports-traumatology-surgeons-mostly-explain-surgical-technique-and-the-least-mentioned-topics-are-injury-prevention-and-complications
#7
JOURNAL ARTICLE
Yavuz Şahbat, Barış Kocaoğlu, Matthieu Ollivier, Simone Cerciello, Doruk Akgün, Eduard Alentorn-Geli, Mahmut Enes Kayaalp, Hasan Furkan Akın, Poroshista Knauer, Abdulaziz Hariri, Fabrizio Mocini, Aleix Pons Bartroli, Romain Seil
PURPOSE: Social media has become the new information acquisition platform for all content producers. In the current literature, there are no studies examining the content quality and the strengths and weaknesses of videos on Instagram that explain anterior cruciate ligament (ACL) injuries, which is the most discussed topic of sports surgery. The aim of this study was to evaluate the quality, strengths and weaknesses of information pertaining to ACL surgery that is disseminated on Instagram...
March 15, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38488223/donor-age-has-no-relevant-role-in-biomechanical-properties-of-allografts-used-in-anterior-cruciate-ligament-acl-reconstruction-a-systematic-review
#8
JOURNAL ARTICLE
Alberto Grassi, Piero Agostinone, Stefano Di Paolo, Emanuele Altovino, Alessandro Gallese, Derya Akbaba, Tommaso Bonanzinga, Maurilio Marcacci, Stefano Zaffagnini
PURPOSE: Surgeons generally consider the donor age as a factor that negatively influences the quality of allograft used in anterior cruciate ligament (ACL) reconstruction, however, the available evidence does not clearly support this statement. The purpose of the study was to investigate if donor age influences the biomechanical properties of allografts used in ACL reconstruction. METHODS: A comprehensive literature search was conducted for all relevant articles using MEDLINE (PubMed), Scopus, and Cochrane Collaboration Library, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis...
March 15, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38486249/biomechanical-gait-analysis-and-rehabilitation-in-a-traumatic-hallux-deficit-patient-a-case-report
#9
JOURNAL ARTICLE
Naoki Doi, Todd Pataky, Hiroshige Tateuchi, Momoko Nagai-Tanima, Tomoki Aoyama
BACKGROUND: The hallux plays a crucial role in maintaining standing balance and facilitating forward and backward movements during gait. CASE PRESENTATION: A 21-year-old Japanese patient, suffering from a traumatic hallux deficit with only a portion of the basal phalanx intact, underwent rehabilitation treatment. The thenar area exhibited instability, leading to impaired balance and walking difficulties. Biomechanical assessment revealed the need for a rehabilitation strategy for the foot, as well as the knee, hip, and trunk...
March 15, 2024: Journal of Medical Case Reports
https://read.qxmd.com/read/38484846/comparison-between-scaphotrapeziotrapezoid-arthrodesis-and-pyrocardan%C3%A2-implant-for-isolated-scaphotrapeziotrapezoid-osteoarthritis
#10
JOURNAL ARTICLE
Martin Cholley-Roulleau, Gilles Dautel, François Dap, Gabriela Hossu, Philippe Bellemère, Lionel Athlani
INTRODUCTION: Scaphotrapeziotrapezoid (STT) arthrodesis and Pyrocardan® implant for painful isolated STT osteoarthritis have shown good results, but no paper has compared their medium-term outcomes. HYPOTHESES: Our main hypothesis would be that the Pyrocardan® implant, by preserving the carpal biomechanics, could lead to better wrist mobility. Our secondary hypotheses would be that no other clinical and radiological differences will be found between these two procedures at a mean 5 years follow-up...
March 12, 2024: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://read.qxmd.com/read/38484144/towards-the-improvement-of-the-mechanical-and-tribological-properties-of-braided-ligament-for-acl-reconstruction-a-carrot-and-stick-strategy
#11
JOURNAL ARTICLE
Shenglin Li, Shuhan Wang, Jiasheng Shao, Jiali Wang, Wenliang Liu, Linxin Chen, Zeng Li, Chao Zhang, Jian Song
Bone tunnel enlargement has been troubling the clinical adoption of braided artificial ligaments for decades, to which mechanical and tribological performance promotion shall be an effective and promising approach. Herein, a "carrot and stick" strategy has been introduced with two types of polyethylene terephthalate (PET) fibers to fabricate hybrid textures, which is expected to advance fatigue and tribological performance without yielding essential mechanical strength and biocompatibility. Owing to advancements in such a "carrot and stick" strategy, the obtained grafts present three promising properties: i) enhancement of mechanical strength; ii) COF reduction of 25% at the greatest extent, thus lowering the risk of bone tunnel enlargement; iii) final displacement shrinkage of graft length after cyclic loadings, favored in the clinic for isometric reconstruction...
March 14, 2024: Advanced Healthcare Materials
https://read.qxmd.com/read/38481575/quantitative-assessment-of-muscle-fatigue-during-rowing-ergometer-exercise-using-wavelet-analysis-of-surface-electromyography-semg
#12
JOURNAL ARTICLE
Natalia Daniel, Jerzy Małachowski, Kamil Sybilski, Dariusz Siemiaszko
In this paper, we present a quantitative assessment of muscle fatigue using surface electromyography (sEMG), a widely recognized method that is conducted through various analytical approaches, including analysis of spectral and time-frequency distributions. Existing research in this field has demonstrated considerable variability in the computational methods used. Although some studies highlight the efficacy of wavelet analysis in dynamic motion, few offer a comprehensive method for determining fatigue and applying it to specific movements...
2024: Frontiers in Bioengineering and Biotechnology
https://read.qxmd.com/read/38481121/designing-biomimetic-3d-printed-osteochondral-scaffolds-for-enhanced-load-bearing-capacity
#13
JOURNAL ARTICLE
Robert Choe, Blake Kuzemchak, George Kotsanos, Eman Mirdamadi, Mary Sherry, Eoin Devoy, Tao Lowe, Jonathan D Packer, John P Fisher
Osteoarthritis is a debilitating chronic joint disorder that affects millions of people worldwide. Since palliative and surgical treatments cannot completely regenerate hyaline cartilage within the articulating joint, osteochondral (OC) tissue engineering has been explored to heal these challenging defects. Using computational simulations and 3D printing, we aimed to build a strategy to fabricate OC scaffolds with enhanced biomechanics. First, computational simulations revealed that interfacial fibrils within a bilayer alter OC scaffold deformation patterns by redirecting load-induced stresses toward the top of the cartilage layer...
March 13, 2024: Tissue Engineering. Part A
https://read.qxmd.com/read/38478880/floquet-engineering-of-a-diatomic-molecule-through-a-bichromatic-radiation-field
#14
JOURNAL ARTICLE
Edgar Barriga, Luis E F Foa Torres, Carlos Cárdenas
We report on a theoretical study of a Cs2 molecule illuminated by two lasers and show how this can result in novel quantum dynamics. We reveal that these interactions facilitate the bypass of the non-crossing rule, forming light-induced conical intersections and modifiable avoided crossings. Our findings show how laser field orientation and strength, along with initial phase differences, can control molecular-state transitions, especially on the micromotion scale. We also extensively discuss how the interaction of radiation with matter gives rise to the emergence of potential energy surfaces of hybrids of radiation and molecular states...
March 13, 2024: Journal of Chemical Theory and Computation
https://read.qxmd.com/read/38477550/preclinical-evaluation-of-bioactive-small-intestinal-submucosa-pmma-bone-cement-for-vertebral-augmentation
#15
JOURNAL ARTICLE
Chi Zhang, Xiongxiong Cai, Mei Li, Jing Peng, Jin Mei, Fangfang Wang, Rui Zhang, Yingjie Zhou, Shuyu Fang, Dongdong Xia, Jiyuan Zhao
In vertebroplasty and kyphoplasty, bioinert poly(methyl methacrylate) (PMMA) bone cement is a conventional filler employed for quick stabilization of osteoporotic vertebral compression fractures (OVCFs). However, because of the poor osteointegration, excessive stiffness, and high curing temperature of PMMA, the implant loosens, the adjacent vertebrae refracture, and thermal necrosis of the surrounding tissue occurs frequently. This investigation addressed these issues by incorporating the small intestinal submucosa (SIS) into PMMA (SIS-PMMA)...
March 13, 2024: ACS Biomaterials Science & Engineering
https://read.qxmd.com/read/38473608/parametric-design-of-porous-structure-and-optimal-porosity-gradient-distribution-based-on-root-shaped-implants
#16
JOURNAL ARTICLE
Lijian Liu, Shaobo Ma, Yongkang Zhang, Shouxiao Zhu, Shuxuan Wu, Guang Liu, Guang Yang
Porous structures can reduce the elastic modulus of implants, decrease stress shielding, and avoid bone loss in the alveolar bone and aseptic loosening of implants; however, there is a mismatch between yield strength and elastic modulus as well as biocompatibility problems. This study aimed to investigate the parametric design method of porous root-shaped implants to reduce the stress-shielding effect and improve the biocompatibility and long-term stability and effectiveness of the implants. Firstly, the porous structure part was parametrically designed, and the control of porosity gradient distribution was achieved by using the fitting relationship between porosity and bias and the position function of bias...
February 29, 2024: Materials
https://read.qxmd.com/read/38472472/mechanical-traits-as-drivers-of-trophic-interaction-between-macrodetritivores-and-leaf-litter
#17
JOURNAL ARTICLE
Théo Marchand, Benjamin Pey, Corinne Pautot, Antoine Lecerf
In ecosystems, the rates of resource consumption by animals drive the flows of matter and energy. Consumption rates are known to vary according to consumer energy requirements, resource nutrient content and mechanical properties. The aim of our study is to determine how mechanical constraints, compared to energetic and nutritional constraints, explain the variation in leaf litter consumption rates by macrodetritivores. In particular, we focus on the impact of litter toughness. To this end, we propose a non-linear model describing leaf litter consumption rates of detritivore as a function of litter toughness...
March 12, 2024: Oecologia
https://read.qxmd.com/read/38467067/mechanical-analysis-of-a-novel-sternal-closure-system-in-static-tensile-loading
#18
JOURNAL ARTICLE
Gardner Yost, Jeffrey Plott, Amogh Angandi, Conor Locke, Thomas Marten, Jonathan W Haft
The most common means of sternal closure after sternotomy is stainless steel wire cerclage. These wires, while inexpensive and simple in design, are known to be associated with low strength and sternal dehiscence. In this biomechanical analysis, we compare single sternal wires, double sternal wires, and a novel sternal closure device we have designed to mitigate sternal dehiscence. The device uses polymer grommets at the sternal interfaces to distribute load over a large surface area of bone. Samples of each closure device were installed in a bone model and distracted at a rate of 10 mm/min while tensile forces were continuously measured and compared...
March 12, 2024: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://read.qxmd.com/read/38464447/suspensory-fixation-for-bone-transfer-procedures-in-shoulder-instability-is-superior-to-screws-in-an-angled-construct-a-biomechanical-analysis
#19
JOURNAL ARTICLE
Kyle Paul, Joseph W Elphingstone, Marshall Williams, John N Manfredi, Achraf Jardaly, Samuel Schick, Susan Floyd, Eugene W Brabston, Amit M Momaya, Brent A Ponce
BACKGROUND: The Latarjet procedure is a common bony augmentation procedure for anterior shoulder instability. Historically, screw fixation is used to secure the coracoid graft to the anterior glenoid surface; however, malpositioning of the graft leads to oblique screw insertion that contributes to complications. Suture buttons (SBs) are a more recent fixation technique that have not been studied alongside standard screw fixation in the context of biomechanical models of angulated fixation...
March 2024: JSES international
https://read.qxmd.com/read/38461743/gastrocnemius-medialis-and-achilles-tendon-properties-do-not-differ-between-children-with-unilateral-or-bilateral-spastic-cerebral-palsy
#20
JOURNAL ARTICLE
Andreas Habersack, Martin Svehlik, Bernhard Guggenberger, Markus Tilp, Annika Kruse
Spastic cerebral palsy (SCP) is a common neurodevelopmental disorder in children, which can be categorized into unilateral and bilateral subtypes. Most studies examining the muscle-tendon properties of the lower extremities in individuals with SCP do not distinguish between subtypes. However, spastic muscle morphology is an important determinant for its function. Therefore, differences in muscle-tendon pathology might lead to different treatment strategies. The aim of this retrospective study was to investigate the muscle-tendon properties between children with unilateral SCP and those with bilateral SCP...
March 7, 2024: Journal of Biomechanics
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