keyword
https://read.qxmd.com/read/38464545/biomechanical-evaluation-of-a-new-intramedullary-nail-compared-with-proximal-femoral-nail-antirotation-and-intertan-for-the-management-of-femoral-intertrochanteric-fractures
#1
JOURNAL ARTICLE
ChaoFeng Wang, Ning Duan, Zhong Li, Teng Ma, Kun Zhang, Qian Wang, Qiang Huang
Purpose: Surgical treatment is the main treatment method for femoral intertrochanteric fractures (FIFs), however, there are lots of implant-related complications after surgery. Our team designed a new intramedullary nail (NIN) to manage such fractures. The purpose of this study was to introduce this new implant and compare it with proximal femoral nail antirotation (PFNA) and InterTAN for treating FIFs. Methods: An AO/OTA 31-A1.3 FIF model was built and three fixation models were created via finite element method, comprising PFNA, InterTAN, and the NIN...
2024: Frontiers in Bioengineering and Biotechnology
https://read.qxmd.com/read/38440186/multi-segment-osteotomy-with-interlocking-intramedullary-nail-fixation-in-the-treatment-of-lower-limb-deformity-in-older-children-with-hypophosphatemic-rickets
#2
JOURNAL ARTICLE
Ming Lu, Haifeng You, Yukun Wang
OBJECTIVE: Malformations of the lower limbs caused by hypophosphatemic rickets in older children are mostly complex, occurring on multiple planes without a single apex and showing arcuate bending of the diaphysis combined with torsion deformity, and are difficult to correct. This study retrospectively investigated the effect of and indicators for multi-segment osteotomy with interlocking intramedullary nail fixation in the treatment of bony deformity caused by hypophosphatemic rickets...
2024: Frontiers in Pediatrics
https://read.qxmd.com/read/38404819/biomechanical-analysis-of-titanium-alloy-and-biodegradable-implants-in-dual-plate-osteosynthesis-for-ao-asif-type-33-c2-fractures
#3
JOURNAL ARTICLE
Mengmeng Hu, Meng Li, Rui Ma, Xiaoya Li, Xiaomeng Ren, Longbo Du, Chuyang Zeng, Jiantao Li, Wei Zhang
BACKGROUND AND OBJECTIVE: Treating geriatric osteoporotic distal femur fractures has always presented challenges, but developing biodegradable materials has brought new opportunities for therapeutic intervention. Despite this progress, there currently needs to be more evidence-based biomechanical guidelines for using dual plate fixation and biodegradable materials in treating osteoporotic comminuted distal femoral fractures.In this study, finite element analysis was conducted to evaluate the mechanical effectiveness of different implant materials (titanium alloys, biodegradable materials, and combinations of both) in the fixation of physiological and osteoporotic distal femoral fractures...
February 29, 2024: Heliyon
https://read.qxmd.com/read/38402230/optimized-reamer-geometry-for-controlled-reaming-of-the-proximal-femur
#4
JOURNAL ARTICLE
Markus Heinecke, Frank Layher, Georg Matziolis
Preparation of the femoral proximal medullary cavity by reaming is essential for intramedullary nail osteosynthesis and hip revision arthroplasty. The use of reamers sometimes exerts high torsional forces on the bone. Design and direction of rotation of the reamer are potential influencing factors. The aim of this biomechanical study is to evaluate the best combination of a right- or left-cutting reamer with a clockwise- or counterclockwise-rotating insert in terms of preparation and safety. Right- and left-cutting reamers with conical design were each introduced into five synthetic femurs in both clockwise and counterclockwise rotation with constant feed force...
February 24, 2024: Scientific Reports
https://read.qxmd.com/read/38385776/derotational-distal-femoral-osteotomy-corrects-excessive-femoral-anteversion-in-patients-with-patellofemoral-instability-a-systematic-review
#5
JOURNAL ARTICLE
Ricardo Ribeiro, Eluana Gomes, Bárbara Ferreira, Inês Figueiredo, Cristina Valente, Diego Delgado, Mikel Sánchez, Renato Andrade, João Espregueira-Mendes
PURPOSE: Patellofemoral instability (PFI) is a common condition that can be caused from multiple factors, including lower limb rotational malalignments. Determining precise criteria for performing corrective torsional osteotomy can be a daunting task due to the lack of consensus on normal and excessive values and the limited evidence-based data in the postoperative results. The purpose was to assess the clinical, functional and imaging outcomes following derotational distal femoral osteotomy (DDFO) in patients with PFI and/or anterior knee pain (AKP) associated with lower limb rotational malalignments...
February 22, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38365167/femoral-internal-torsion-greater-than-twenty-five-degrees-and-or-external-tibial-torsion-greater-than-thirty-degrees-as-measured-by-computed-tomography-are-threshold-values-for-axial-alignment-correction-in-patellofemoral-instability
#6
REVIEW
Kristen I Barton, Kevin R Boldt, Olawale A Sogbein, Nicholas J Steiner, Gilbert Moatshe, Elizabeth Arendt, Alan Getgood
OBJECTIVES: Patellofemoral instability (PFI) has multiple predisposing anatomic factors including ligamentous hyperlaxity, coronal and axial malalignment, patella alta, trochlea dysplasia, excessive lateral patellar tilt, and excessive lateral Q vector. Yet, few studies have analyzed surgical thresholds for performing axial alignment corrective osteotomies in the treatment of PFI and patella maltracking. The objective of this systematic literature review was to determine if there is a threshold for axial plane alignment that triggers surgical correction for treatment of patellar instability in the published literature...
February 14, 2024: Journal of ISAKOS
https://read.qxmd.com/read/38347085/a-framework-based-on-subject-specific-musculoskeletal-models-and-monte-carlo-simulations-to-personalize-muscle-coordination-retraining
#7
JOURNAL ARTICLE
Hans Kainz, Willi Koller, Elias Wallnöfer, Till R Bader, Gabriel T Mindler, Andreas Kranzl
Excessive loads at lower limb joints can lead to pain and degenerative diseases. Altering joint loads with muscle coordination retraining might help to treat or prevent clinical symptoms in a non-invasive way. Knowing how much muscle coordination retraining can reduce joint loads and which muscles have the biggest impact on joint loads is crucial for personalized gait retraining. We introduced a simulation framework to quantify the potential of muscle coordination retraining to reduce joint loads for an individuum...
February 12, 2024: Scientific Reports
https://read.qxmd.com/read/38345811/emergency-department-volume-and-delayed-diagnosis-of-serious-pediatric-conditions
#8
JOURNAL ARTICLE
Kenneth A Michelson, Chris A Rees, Todd A Florin, Richard G Bachur
IMPORTANCE: Diagnostic delays are common in the emergency department (ED) and may predispose to worse outcomes. OBJECTIVE: To evaluate the association of annual pediatric volume in the ED with delayed diagnosis. DESIGN, SETTING, AND PARTICIPANTS: This retrospective cohort study included all children younger than 18 years treated at 954 EDs in 8 states with a first-time diagnosis of any of 23 acute, serious conditions: bacterial meningitis, compartment syndrome, complicated pneumonia, craniospinal abscess, deep neck infection, ectopic pregnancy, encephalitis, intussusception, Kawasaki disease, mastoiditis, myocarditis, necrotizing fasciitis, nontraumatic intracranial hemorrhage, orbital cellulitis, osteomyelitis, ovarian torsion, pulmonary embolism, pyloric stenosis, septic arthritis, sinus venous thrombosis, slipped capital femoral epiphysis, stroke, or testicular torsion...
February 12, 2024: JAMA Pediatrics
https://read.qxmd.com/read/38321464/increased-knee-torsional-misalignment-associated-with-femoral-torsion-is-related-to-non-contact-anterior-cruciate-ligament-injury-a-case-control-study
#9
JOURNAL ARTICLE
Dehua Wang, Hengkai Fan, Linlin Hu, Xi Liang, Wei Huang, Ke Li
BACKGROUND: Altered axial biomechanics of the knee are recognized as a risk factor for non-contact anterior cruciate ligament (ACL) injury. However, the relationship of knee and segmental torsion to non-contact ACL and combined anterolateral ligament (ALL) injury is unclear. This study aims to determine the relationship of knee and segmental torsion to non-contact ACL injury and to explore their relationship with ALL injuries. METHODS: We divided 122 patients with arthroscopically confirmed non-contact ACL injuries into an ACL injury group (isolated ACL injury, 63 patients) and an ACL + ALL injury group (ACL combined with ALL injury,59 patients)...
February 6, 2024: Journal of Orthopaedic Surgery and Research
https://read.qxmd.com/read/38270286/tibial-tuberosity-trochlear-groove-distance-is-significantly-decreased-by-medial-closing-wedge-distal-femoral-osteotomy
#10
JOURNAL ARTICLE
Julius Watrinet, Maximilian Joergens, Philipp Blum, Yannick Ehmann, Peter Augat, Fabian Stuby, Steffen Schröter, Joerg Harrer, Julian Fürmetz
PURPOSE: While medial closing wedge distal femoral osteotomy (MCWDFO) has been used to address patella instability combined with valgus malalignment, its impact on patellofemoral parameters remains uncharted. Hence, this study seeks to establish a three-dimensional (3D) planning of MCWDFO and measure its effect on the tibial tubercle - trochlear groove distance (TTTG) through simulation and calculation. METHODS: MCWDFO with a stepwise increment of one-degree varisation (1°-15°) was performed on 3D surface models of 14 lower extremities with valgus malalignment and 24 lower extremities with neutral alignment of the lower limb, resulting in a total of 608 simulations...
January 25, 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38226671/clinical-outcomes-of-derotational-femoral-osteotomy-combined-with-medial-patellofemoral-ligament-reconstruction-in-patients-with-patellar-dislocation-and-increased-femoral-anteversion-unaffected-by-the-pattern-of-distribution-of-femoral-torsion
#11
JOURNAL ARTICLE
Chongyi Fan, Yingzhen Niu, Kuo Hao, Lingce Kong, Zhenhui Huo, Wei Lin, Fei Wang
PURPOSE: The aim of this study was to evaluate the clinical effect of derotational femoral osteotomy combined with medial patellofemoral ligament reconstruction for patellar dislocation and the effect of the distribution of femoral torsion at different segments on postoperative function. METHODS: Forty-two patients with patellar dislocation who underwent derotational femoral osteotomy from 2017 to 2021 were retrospectively analysed. All patients received computed tomography scans from the hip to the knee to evaluate correction of the femoral anteversion (FA) angle, patellar tilt angle (PTA) and congruence angle (CA) after derotational femoral osteotomy...
January 2024: Knee Surgery, Sports Traumatology, Arthroscopy
https://read.qxmd.com/read/38219109/editorial-commentary-absent-extreme-bony-malalignment-medial-patellofemoral-reconstruction-is-a-sufficient-primary-surgery-for-adolescents-with-recurrent-patella-instability
#12
EDITORIAL
Seth Lawrence Sherman, Anna Bartsch
When planning an adolescent's primary surgery for recurrent patella instability, the surgeon must weigh the failure risk of performing medial patellofemoral reconstruction (MPFLR) versus the potential morbidity of adding a concomitant bony procedure, such as tibial tubercle osteotomy (TTO). In this age group, isolated MPFLR is an excellent operation with high clinical success, low failure rates, and favorable complication profile. Patients with high grade J-sign and severe trochlea dysplasia, apprehension into deep flexion, and extremes of bony malalignment, including elevated tibial tubercle-trochlear groove distance may benefit from "doing more" than MPFLR alone...
November 19, 2023: Arthroscopy
https://read.qxmd.com/read/38161408/remodeling-of-rotational-malunion-of-femoral-shaft-in-children
#13
JOURNAL ARTICLE
C Anil Kumar, Jonathan Reddy, M Praveen Jose, Abhay Gahukamble, Thomas Palocaren, Vrisha Madhuri
BACKGROUND: The degree of expected rotational remodeling in femoral shaft fractures is poorly understood, partly because of the difficulty in accurately measuring rotational alignment radiographically before and after treatment. This study aimed to assess the degree of rotational remodeling in the short-term following post-traumatic fracture shaft of the femur with > 10° rotational malunion in children under 15 years. METHODOLOGY: We carried out an observational study with a prospective follow-up on 18 children aged < 15 years with isolated, unilateral, oblique, or spiral, closed femur shaft fracture treated with closed reduction and immobilization with hip spica or internal fixation with elastic stable intramedullary nails or minimal invasive plate osteosynthesis...
January 2024: Indian Journal of Orthopaedics
https://read.qxmd.com/read/38128220/functional-knee-joint-axis-calibration-and-outcome-after-femoral-derotation-in-patients-with-cerebral-palsy
#14
JOURNAL ARTICLE
Arik Rehani Musagara, Firooz Salami, Marco Götze, Sebastian I Wolf
BACKGROUND: Patients with cerebral palsy and increased femoral anteversion frequently show disturbing internal rotation gait which may be treated via femoral derotation osteotomy (FDO). A recent study monitored that hip rotation in gait may heavily depend on the procedure by which it is being determined. Traditional measures using the femoral epicondyles as reference for the knee axis (CONV) resulted in more severe transverse plane deviations compared to those using a functional method (FUNC) with relevant implications for treatment indication of FDO...
December 10, 2023: Gait & Posture
https://read.qxmd.com/read/38116197/proximal-femoral-bionic-nail-a-novel-internal-fixation-system-for-the-treatment-of-femoral-neck-fractures-a-finite-element-analysis
#15
JOURNAL ARTICLE
Kai Ding, Yanbin Zhu, Yifan Zhang, Yonglong Li, Haicheng Wang, Jiaxing Li, Wei Chen, Qi Zhang, Yingze Zhang
Introduction: Currently, cannulated screws (CSs) and dynamic hip screws (DHSs) are widely used for the treatment of femoral neck fractures, but the postoperative complications associated with these internal fixations remain high. In response to this challenge, our team proposes a new approach involving triangular-supported fixation and the development of the proximal femoral bionic nail (PFBN). The primary objective of this study is to investigate the biomechanical differences among CSs, DHSs, and the PFBN in their capacity to stabilize femoral neck fractures...
2023: Frontiers in Bioengineering and Biotechnology
https://read.qxmd.com/read/38114998/combination-effect-of-chinese-kidney-tonifying-granules-and-platelet-rich-plasma-gels-on-enhancing-bone-healing-in-rat-models-with-femur-defects
#16
JOURNAL ARTICLE
Zhiqian Huo, Feng Wu, Guoliang Lu, Feng Huang
BACKGROUND: The traditional Chinese kidney-tonifying granules, known as Bushen Zhongyao Keli (BSZYKL), have been found to stimulate calcium salt deposition, enhance bone formation, and foster bone growth within the bone matrix at sites of bone defects. On the other hand, platelet-rich plasma (PRP) is enriched with various growth factors capable of facilitating the repair of bone defects and enhancing bone strength following fractures. This study is dedicated to investigating the combined efficacy of BSZYKL and PRP gel (PRP-G) in the treatment of bone defects...
December 19, 2023: Journal of Orthopaedic Surgery and Research
https://read.qxmd.com/read/38113915/early-surgical-management-of-medial-patellar-luxation-in-juvenile-dogs
#17
JOURNAL ARTICLE
Alefe L C Carrera, Bruno W Minto, Eloy H P Curuci, Carla G Paula, Julia B Jassniker, Olicies Cunha
OBJECTIVE:  The aim of this study was to analyse a series of five cases of early surgical treatment in juvenile canine patients with high-grade medial patellar luxation. STUDY DESIGN:  Canine patients, with immature skeleton, affected by grade III or IV medial patellar luxation and treated by multimodal surgical techniques were selected. RESULTS:  Five dogs of different breeds, mean age 7.2 ± 3.0 months, met the inclusion criteria...
December 19, 2023: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://read.qxmd.com/read/38108926/the-quest-for-optimal-femoral-torsion-angle-measurements-a-comparative-advanced-3d-study-defining-the-femoral-neck-axis
#18
JOURNAL ARTICLE
Bert Van Fraeyenhove, Jeroen C F Verhaegen, Jonas Grammens, Gino Mestach, Emmanuel Audenaert, Annemieke Van Haver, Peter Verdonk
PURPOSE: There is high variability in femoral torsion, measured on two-dimensional (2D) computed tomography (CT) scans. The aim of this study was to find a reliable three-dimensional (3D) femoral torsion measurement method, assess the influence of CAM deformity on femoral torsion measurement, and to promote awareness for the used measurement method. METHODS: 3D models of 102 dry femur specimens were divided into a CAM and non-CAM group. Femoral torsion was measured by one 2D-CT method described by Murphy et al...
December 18, 2023: Journal of Experimental Orthopaedics
https://read.qxmd.com/read/38088406/-what-surgical-treatment-for-femoro-acetabular-impingement
#19
JOURNAL ARTICLE
Morgan Gauthier, Matthieu Zingg, Didier Hannouche
Femoroacetabular impingement (FAI) is a frequent cause of hip pain in young people and athletes. It requires a complete work-up, including X-rays, hip arthro-MRI and CT coxometry with measurement of femoral torsion. The surgical management of CFA must be adapted to the morphological anomalies of the femur (cam), acetabulum (pincer) and femoral torsional disorders. Most CFA can be treated by hip arthroscopy, with correction of the cam and suture of the labrum. Some CFA with a bulky or posterior cam require surgical hip dislocation...
December 13, 2023: Revue Médicale Suisse
https://read.qxmd.com/read/38079507/loading-of-the-hip-and-knee-during-swimming-an-in-vivo-load-study
#20
JOURNAL ARTICLE
Sijia Zhou, Alwina Bender, Ines Kutzner, Jörn Dymke, Tazio Maleitzke, Carsten Perka, Georg N Duda, Tobias Winkler, Philipp Damm
BACKGROUND: Swimming is commonly recommended as postoperative rehabilitation following total hip arthroplasty (THA) and total knee arthroplasty (TKA). So far, in vivo hip and knee joint loads during swimming remain undescribed. METHODS: In vivo hip and knee joint loads were measured in 6 patients who underwent THA and 5 patients who underwent TKA with instrumented joint implants. Joint loads, including the resultant joint contact force (FRes), torsional moment around the femoral shaft axis or the tibial axis (MTors), bending moment at the middle of the femoral neck (MBend), torsional moment around the femoral neck axis (MTne), and medial force ratio (MFR) in the knee, were measured during breaststroke swimming at 0...
October 23, 2023: Journal of Bone and Joint Surgery. American Volume
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