keyword
https://read.qxmd.com/read/38415963/risk-of-tibial-baseplate-loosening-is-low-in-patients-following-unrestricted-kinematic-alignment-total-knee-arthroplasty-using-a-cruciate-retaining-medial-conforming-insert-a-study-using-radiostereometric-analysis%C3%A2-at-2-years
#21
JOURNAL ARTICLE
Abigail E Niesen, Pranav A Tirumalai, Stephen M Howell, Maury L Hull
PURPOSE: Assessing the risk of tibial baseplate loosening in patients after unrestricted kinematically aligned (unKA) total knee arthroplasty (TKA) using a medially conforming insert is important because baseplates generally are aligned in varus which has been linked to an increased incidence of aseptic loosening following mechanically aligned TKA. Two limits that indicate long-term stability in patients are a change in maximum total point motion between 1 and 2 years (ΔMTPM) < 0...
February 28, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38410061/tourniquet-does-not-affect-intraoperative-kinematics-during-total-knee-arthroplasty-results-of-a-prospective-study-using-a-robotic-assistance-system
#22
JOURNAL ARTICLE
Martin Faschingbauer, Kay Freisem, Farouk Khury, Ryan J Martin, Ralf Bieger, Heiko Reichel
PURPOSE: Tourniquet use during total knee arthroplasty (TKA) remains controversial. There are limited data demonstrating the effect of tourniquet use on flexion and extension gaps. The use of a tourniquet can theoretically affect the kinematics of the knee joint, specifically the extension and flexion gaps and the laxity, by mechanically compressing the soft tissues including the muscles above the knee joint. Therefore, this study was designed to prospectively evaluate changes in flexion and extension gaps with and without the use of a tourniquet...
February 27, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38404699/a-retrospective-comparison-of-mechanically-vs-kinematically-aligned-unicompartmental-knee-arthroplasties
#23
JOURNAL ARTICLE
Jasmine Gulati, Callie Fernandez, Julian Ricci, Dion Birhiray, Brock Preheim, Rama Bikkina, Sadr Kamran, Evan Argintar
BACKGROUND: Unicompartmental Knee Arthroplasties (UKAs) treat unicompartmental arthritic degeneration. Traditionally, they are placed in a mechanical alignment with bone cuts perpendicular to the leg's mechanical axis. Kinematic alignment, an alternative, considers the patient's pre-arthritic alignment. METHODS: A retrospective study at Medstar Washington Hospital Center from 2015 to 2022 identified 72 UKA patients. Among them, 53 had mechanical alignments, and 20 had kinematic alignments...
June 2024: Journal of Orthopaedics
https://read.qxmd.com/read/38401611/a-restricted-functional-balancing-technique-for-total-knee-arthroplasty-with-a-varus-deformity-does-a-medial-soft-tissue-release-result-in-a-worse-outcome
#24
JOURNAL ARTICLE
Kenneth A Gustke, Peter Simon
BACKGROUND: A functional alignment technique for total knee arthroplasty (TKA) utilizes implant position modifications to balance the soft tissues. There is concern that, in some cases, extreme coronal and tibial component alignment could facilitate early implant failure. To be cautious, a restricted functional alignment may be used. The purpose of our study was to evaluate the results of TKA in patients who have varus deformities using a restricted functional alignment technique. We hypothesized that adding a medial soft-tissue release within restricted boundaries would not result in inferior outcomes...
February 22, 2024: Journal of Arthroplasty
https://read.qxmd.com/read/38401101/correlation-between-preoperative-and-postoperative-alignment-and-kinematic-gait-in-total-knee-arthroplasty
#25
JOURNAL ARTICLE
Peng Liu, Huifeng Xie, Yushu Chen, Rixu Liu, Junjie Zeng, Bo Bai
OBJECTIVE: Maintaining the lower limb in a neutral posture following total knee arthroplasty (TKA) has long been a concept maintained by operators. This study aimed to investigate the relationship between changes in lower limb alignment and the dynamics of knee gait before and after TKA to understand the impact of alignment on gait better and offer a theoretical foundation for correcting lower limb alignment in TKA. METHODS: Our study included a group of 20 participants...
February 9, 2024: Alternative Therapies in Health and Medicine
https://read.qxmd.com/read/38400918/an-objective-skill-assessment-framework-for-microsurgical-anastomosis-based-on-ali-scores
#26
JOURNAL ARTICLE
Soheil Gholami, Anaëlle Manon, Kunpeng Yao, Aude Billard, Torstein R Meling
INTRODUCTION: The current assessment and standardization of microsurgical skills are subjective, posing challenges in reliable skill evaluation. We aim to address these limitations by developing a quantitative and objective framework for accurately assessing and enhancing microsurgical anastomosis skills among surgical trainees. We hypothesize that this framework can differentiate the proficiency levels of microsurgeons, aligning with subjective assessments based on the ALI score. METHODS: We select relevant performance metrics from the literature on laparoscopic skill assessment and human motor control studies, focusing on time, instrument kinematics, and tactile information...
February 24, 2024: Acta Neurochirurgica
https://read.qxmd.com/read/38400619/normal-and-malaligned-talonavicular-fusion-alters-cadaveric-foot-pressure-and-kinematics
#27
JOURNAL ARTICLE
Elizabeth P Wahl, William D Lin, Eric C Whittaker, Brian K Cook, Bruce J Sangeorzan, William R Ledoux
Talonavicular (TN) fusion is a common treatment for TN arthritis or deformity correction. There is incongruous evidence regarding remaining motion at the talocalcaneal and calcaneocuboid joints after TN fusion. Additionally, the effects of a malaligned TN fusion are not well understood and alignment of the fusion may be important for overall foot integrity. This project assessed the kinematic and kinetic effects of neutral and malaligned TN fusions. Ten cadaveric feet were tested on a gait simulator in four conditions: unfused, fused in neutral, fused in varus, and fused in valgus...
February 23, 2024: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://read.qxmd.com/read/38389595/caliper-based-restricted-kinematic-alignment-total-knee-arthroplasty
#28
JOURNAL ARTICLE
Takahiro Okajima, Takafumi Hiranaka, Yasuhiro Fukai, Sho Tanaka, Motoki Koide, Takaaki Fujishiro, Koji Okamoto
Restricted kinematic alignment total knee arthroplasty (rKA-TKA) is a reasonable selection for avoiding an extreme alignment that has been conceded to induce implant failure. However, computer-aided devices (CAS), such as navigation, robotics, and patient-specific instrumentation, are necessary to perform rKA-TKA. This paper reports on the surgical technique of kinematic alignment total knee arthroplasty (KA-TKA) using mechanical instruments. The lateral distal femoral angle (LDFA) and the medial proximal tibial angle (MPTA) are measured from preoperative long radiographs or CT of the lower limb, and the arithmetic hip-knee-ankle angle (aHKA) is calculated from the MPTA - LDFA...
January 2024: Curēus
https://read.qxmd.com/read/38384800/a-novel-computational-framework-for-the-estimation-of-internal-musculoskeletal-loading-and-muscle-adaptation-in-hypogravity
#29
JOURNAL ARTICLE
James Cowburn, Gil Serrancolí, Gaspare Pavei, Alberto Minetti, Aki Salo, Steffi Colyer, Dario Cazzola
Introduction: Spaceflight is associated with substantial and variable musculoskeletal (MSK) adaptations. Characterisation of muscle and joint loading profiles can provide key information to better align exercise prescription to astronaut MSK adaptations upon return-to-Earth. A case-study is presented of single-leg hopping in hypogravity to demonstrate the additional benefit computational MSK modelling has when estimating lower-limb MSK loading. Methods: A single male participant performed single-leg vertical hopping whilst attached to a body weight support system to replicate five gravity conditions (0...
2024: Frontiers in Physiology
https://read.qxmd.com/read/38383530/robot-assisted-partial-knee-replacement-versus-standard-total-knee-replacement-roboknees-a-protocol-for-a-pilot-randomized-controlled-trial
#30
JOURNAL ARTICLE
Kim Madden, Breanne Flood, Monica Malek, Vincent Milantoni, Janie L Astephen Wilson, Jean-Eric Tarride, Vickas Khanna, Anthony Adili
BACKGROUND: Total knee arthroplasty is a common surgery for end-stage knee osteoarthritis. Partial knee arthroplasty is also a treatment option for patients with arthritis present in only one or two knee compartments. Partial knee arthroplasty can preserve the natural knee biomechanics, but these replacements may not last as long as total knee replacements. Robotic-assisted orthopedic techniques can help facilitate partial knee replacements, increasing accuracy and precision. This trial will investigate the feasibility and assess clinical outcomes for a larger definitive trial...
February 21, 2024: Pilot and Feasibility Studies
https://read.qxmd.com/read/38372396/patterns-and-assessment-of-spastic-hemiplegic-gait
#31
JOURNAL ARTICLE
Sheng Li
Hemiparetic gait disorders are common in stroke survivors. A circumductory gait is often considered the typical hemiparetic gait. In clinical practice, a wide spectrum of abnormal gait patterns is observed, depending on the severity of weakness and spasticity, and the anatomical distribution of spasticity. Muscle strength is the key determinant of gait disorders in hemiparetic stroke survivors. Spasticity and its associated involuntary activation of synergistic spastic muscles often alter posture of involved joint(s) and subsequently the alignment of hip, knee, and ankle joints, resulting in abnormal gait patterns...
February 19, 2024: Muscle & Nerve
https://read.qxmd.com/read/38355008/total-knee-arthroplasty-where-are-we-after-the-kinematic-alignment-wave
#32
EDITORIAL
Matthew Arnold, Sébastien Lustig, Gilles Pasquier, Donald Hansom
No abstract text is available yet for this article.
February 12, 2024: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://read.qxmd.com/read/38349433/effect-of-meniscus-modelling-assumptions-in-a-static-tibiofemoral-finite-element-model-importance-of-geometry-over-material
#33
JOURNAL ARTICLE
Jiacheng Yao, John Crockett, Mathias D'Souza, Gavin A Day, Ruth K Wilcox, Alison C Jones, Marlène Mengoni
Finite element studies of the tibiofemoral joint have increased use in research, with attention often placed on the material models. Few studies assess the effect of meniscus modelling assumptions in image-based models on contact mechanics outcomes. This work aimed to assess the effect of modelling assumptions of the meniscus on knee contact mechanics and meniscus kinematics. A sensitivity analysis was performed using three specimen-specific tibiofemoral models and one generic knee model. The assumptions in representing the meniscus attachment on the tibia (shape of the roots and position of the attachment), the material properties of the meniscus, the shape of the meniscus and the alignment of the joint were evaluated, creating 40 model instances...
February 13, 2024: Biomechanics and Modeling in Mechanobiology
https://read.qxmd.com/read/38349219/distribution-of-coronal-plane-alignment-of-the-knee-classification-in-chinese-osteoarthritic-and-healthy-population-a-retrospective-cross-sectional-observational-study
#34
JOURNAL ARTICLE
Yu-Hang Gao, Yu-Meng Qi, Pei-Hong Huang, Xing-Yu Zhao, Xin Qi
BACKGROUND: Few studies have reported the coronal constitutional alignment of the lower limbs in mainland China. This study aimed to analyse the distribution of the coronal plane alignment of the knee (CPAK) classification in the osteoarthritic and healthy Chinese populations. MATERIALS AND METHODS: The CPAK distributions of 246 patients (477 knees) with osteoarthritis (OA) and 107 healthy individuals (214 knees) were retrospectively examined using long-leg radiographs...
February 13, 2024: International Journal of Surgery
https://read.qxmd.com/read/38348693/determination-of-optimal-component-positioning-in-tha-using-3d-preoperative-planning
#35
JOURNAL ARTICLE
Michael LaCour, Manh Ta, Jarrod Nachtrab, Thang Nguyen, Richard Komistek
Advancements in three-dimensional (3D) preoperative planning tools can offer surgeons and design engineers detailed feedback and additional opportunities for clinical advancements. The objective of this study is to use a 3D total hip arthroplasty preoperative planning tool to compare femoral component alignment for three different stem systems. The planning tool in this study used morphology data of femoral bones gathered from a CT database, seven from postoperative patients and 63 from statistical shape models (SSMs), to suggest specific implant sizes and optimal placements in 3D to match each specific bone model...
February 13, 2024: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://read.qxmd.com/read/38331364/the-fundamentals-and-applications-of-wearable-sensor-devices-in-sports-medicine-a-scoping-review
#36
REVIEW
Reena J Olsen, Sayyida S Hasan, Joshua J Woo, Danyal H Nawabi, Prem N Ramkumar
PURPOSE: To (1) characterize the various forms of wearable sensor devices (WSDs) and (2) review the peer-reviewed literature of applied wearable technology within sports medicine. METHODS: A systematic search of PubMed and EMBASE databases, from inception through 2023, was conducted to identify eligible studies using WSDs within sports medicine. Data extraction was performed of study demographics and sensor specifications. Included studies were categorized by application: athletic training, rehabilitation, and research...
February 7, 2024: Arthroscopy
https://read.qxmd.com/read/38325192/a-novel-computational-workflow-to-holistically-assess-total-knee-arthroplasty-biomechanics-identifies-subject-specific-effects-of-joint-mechanics-on-implant-fixation
#37
JOURNAL ARTICLE
Jonathan D Glenday, Jonathan M Vigdorchik, Peter K Sculco, Cynthia A Kahlenberg, David J Mayman, Eytan M Debbi, Joseph D Lipman, Timothy M Wright, Fernando J Quevedo González
Computational studies of total knee arthroplasty (TKA) often focus on either joint mechanics (kinematics and forces) or implant fixation mechanics. However, such disconnect between joint and fixation mechanics hinders our understanding of overall TKA biomechanical function by preventing identification of key relationships between these two levels of TKA mechanics. We developed a computational workflow to holistically assess TKA biomechanics by integrating musculoskeletal and finite element (FE) models. For our initial study using the workflow, we investigated how tibiofemoral contact mechanics affected the risk of failure due to debonding at the implant-cement interface using the four available subjects from the Grand Challenge Competitions to Predict In Vivo Knee Loads...
February 3, 2024: Journal of Biomechanics
https://read.qxmd.com/read/38323331/speech-perception-difficulty-modulates-theta-band-encoding-of-articulatory-synergies
#38
JOURNAL ARTICLE
Alessandro Corsini, Alice Tomassini, Aldo Pastore, Ioannis Delis, Luciano Fadiga, Alessandro D'Ausilio
The human brain tracks available speech acoustics and extrapolates missing information such as the speaker's articulatory patterns. However, the extent to which articulatory reconstruction supports speech perception remains unclear. This study explores the relationship between articulatory reconstruction and task difficulty. Participants listened to sentences and performed a speech-rhyming task. Real kinematic data of the speaker's vocal tract were recorded via electromagnetic articulography (EMA) and aligned to corresponding acoustic outputs...
February 7, 2024: Journal of Neurophysiology
https://read.qxmd.com/read/38310005/assessment-of-a-fully-parametric-thoraco-lumbar-spine-model-generator-with-articulated-ribcage
#39
JOURNAL ARTICLE
Emilia Bellina, Maria Elvira Laurino, Alice Perego, Alice Pezzinga, Linda Carpenedo, Davide Ninarello, Luigi La Barbera
The present paper describes a novel user-friendly fully-parametric thoraco-lumbar spine CAD model generator including the ribcage, based on 22 independent parameters (1 posterior vertebral body height per vertebra + 4 sagittal alignment parameters, namely pelvic incidence, sacral slope, L1-L5 lumbar lordosis, and T1-T12 thoracic kyphosis). Reliable third-order polynomial regression equations were implemented in Solidworks to analytically calculate 56 morphological dependent parameters and to automatically generate the spine CAD model based on primitive geometrical features...
January 20, 2024: Journal of Biomechanics
https://read.qxmd.com/read/38306675/analyzing-the-kinematics-and-longitudinal-aerodynamics-of-a-four-wing-bionic-aircraft
#40
JOURNAL ARTICLE
Lishuang Wang, Zhiwei Shi, Xi Geng, Shengxiang Tong, Zhen Chen
This paper designs a bionic aircraft model equipped with multiple degrees of freedom to study the inertial force equation and the aerodynamic interaction between its forewings and hindwings. Each wing's Phase Difference Angle (PDA) and Stroke Plane Angle (SPA) are independently adjustable. Employing the kinematic equation of a single wing, we establish a model for the inertial force of the four-wing aircraft, validating its accuracy through experimental comparisons. Furthermore, we analyze various combinations of PDA and SPA parameters for the fore- and hindwings to ascertain the most efficient aerodynamic motion modes...
February 2, 2024: Bioinspiration & Biomimetics
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