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https://www.readbyqxmd.com/read/29744321/morphology-of-intra-articular-structures-and-histology-of-menisci-of-knee-joint
#1
Monika Gupta, Parmod Kumar Goyal, Poonam Singh, Anu Sharma
Introduction: Menisci and cruciate ligaments are intra-articular structures of knee, and injury to these structures is common. Morphometric data gained in the study will help in analyzing the variations among humans and correlating it with the possibility, location, and type of injuries as well as better interpretation of structures during magnetic resonance imaging and arthroscopy which will further help in reconstructive surgeries of knee. Materials and Methods: Width and thickness of the medial menisci (MM), lateral menisci (LM), and maximum length and width of anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) were taken on twenty knees...
April 2018: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/29722123/a-tricalcium-phosphate-polyether-ether-ketone-anchor-bionic-fixation-device-for-anterior-cruciate-ligament-reconstruction-safety-and-efficacy-in-a-beagle-model
#2
Genwen Mao, Zili Qin, Zheng Li, Xiang Li, Yusheng Qiu, Weiguo Bian
The goal of this study was to develop a bionic fixation device based on the use of a tricalcium phosphate/polyether ether ketone anchor and harvesting of the ulnar carpal flexor muscle tendon for application as a ligament graft in a beagle anterior cruciate ligament (ACL) reconstruction model, with the goal of accelerating the ligament graft-to-bone tunnel healing and providing a robust stability through exploration of this new kind of autologous ligament graft. The safety and efficacy of this fixation device were explored 3 and 6 months after surgery in a beagle ACL reconstruction model using biomechanical tests and comprehensive histological observation...
May 2, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29706246/cross-sectional-area-measurement-of-the-central-tarsometatarsal-articulation-a-review-of-computed-tomography-scans
#3
John Randolph Clements, Kelley Whitmer, Hoa Nguyen, Matthew Rich
Currently, disagreement exists regarding the superior method for repairing a ligamentous Lisfranc injury regarding whether to use arthrodesis or open reduction internal fixation. The 2 procedures differ in the amount of articular cartilage destroyed. Arthrodesis removes all the articular cartilage, and open reduction internal fixation places transarticular screws, essentially destroying a portion of cartilage. We performed a review of 30 consecutive computed tomography scans that included both foot length and undamaged first, second, and third tarsometatarsal joints to quantify the amount of articular surface area destroyed by placement of standardized 4-mm diameter screws...
April 26, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29694389/site-specific-glycosaminoglycan-content-is-better-maintained-in-the-pericellular-matrix-than-the-extracellular-matrix-in-early-post-traumatic-osteoarthritis
#4
Simo P Ojanen, Mikko A J Finnilä, Aino E Reunamo, Ari P Ronkainen, Santtu Mikkonen, Walter Herzog, Simo Saarakkala, Rami K Korhonen
INTRODUCTION: One of the characteristics of early osteoarthritis (OA) is the loss of fixed charged density (FCD) of glycosaminoglycans in the superficial zone of articular cartilage. However, possible local changes in the FCD content of the pericellular matrix (PCM) are not fully understood. Hence, our aim was to investigate the effect of unilateral anterior cruciate ligament transection (ACLT) in rabbit knees on estimated FCD in the PCM compared to that in the ECM, and relate these results with cell morphology...
2018: PloS One
https://www.readbyqxmd.com/read/29692374/evaluation-of-knees-in-asymptomatic-amateur-ice-hockey-players-using-3-0-t-magnetic-resonance-imaging-a-case-control-study
#5
Xiao-Dan Chang, Pei Yang, Xin-Yan Mu, Wei-Li Ma, Mo Zhou
Background: Research on the changes to knee structures in asymptomatic amateur ice hockey players (AAIHPs) has been limited. We aimed to assess the performance of the knees in AAIHPs using 3.0-T magnetic resonance imaging (MRI). Methods: A total of 71 asymptomatic knees (32 AAIHPs and 39 age- and sex-matched controls) were imaged using a 3.0-T MRI scanner at the Affiliated Zhongshan Hospital of Dalian University in April 2017. Two experienced musculoskeletal radiologists were blinded to assess all MRI findings, including bursae around the knee, bone marrow edema (BME), meniscal signal changes, and articular cartilage and ligament damage...
May 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29680325/effects-of-severe-hallux-valgus-on-metatarsal-stress-and-the-metatarsophalangeal-loading-during-balanced-standing-a-finite-element-analysis
#6
Yan Zhang, Jan Awrejcewicz, Olga Szymanowska, Siqin Shen, Xiaoxue Zhao, Julien S Baker, Yaodong Gu
The internal stress of the human foot enables efficient parametric evaluation of structural and functional impairments associated with foot deformities, such as hallux valgus (HV). However, the status of the internal stress of such a deformed foot remains insufficiently addressed due to the difficulties and limitations of experimental approaches. This study, using finite element (FE) methodology, investigated the influence of severe HV deformity on the metatarsal stress and the metatarsophalangeal (MTP) joint loading during balanced standing...
April 16, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29679256/biomechanical-features-of-six-design-of-the-delta-external-fixator-for-treating-pilon-fracture-a-finite-element-study
#7
Muhammad Hanif Ramlee, Mohd Ayub Sulong, Evelyn Garcia-Nieto, Daniel Angure Penaranda, Antonio Ros Felip, Mohammed Rafiq Abdul Kadir
Pilon fractures can be caused by high-energy vertical forces which may result in long-term patient immobilization. Many experts in orthopedic surgery recommend the use of a Delta external fixator for type III Pilon fracture treatment. This device can promote immediate healing of fractured bone, minimizing the rate of complications as well as allowing early mobilization. The characteristics of different types of the Delta frame have not been demonstrated yet. By using the finite element method, this study was conducted to determine the biomechanical characteristics of six different configurations (Model 1 until Model 6)...
April 21, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29677139/musculoskeletal-model-development-of-the-elbow-joint-with-an-experimental-evaluation
#8
Munsur Rahman, Mohsen Sharifi Renani, Akin Cil, Antonis P Stylianou
A dynamic musculoskeletal model of the elbow joint in which muscle, ligament, and articular surface contact forces are predicted concurrently would be an ideal tool for patient-specific preoperative planning, computer-aided surgery, and rehabilitation. Existing musculoskeletal elbow joint models have limited clinical applicability because of idealizing the elbow as a mechanical hinge joint or ignoring important soft tissue (e.g., cartilage) contributions. The purpose of this study was to develop a subject-specific anatomically correct musculoskeletal elbow joint model and evaluate it based on experimental kinematics and muscle electromyography measurements...
April 20, 2018: Bioengineering
https://www.readbyqxmd.com/read/29662782/quantitative-analysis-of-t2-relaxation-times-of-the-patellofemoral-joint-cartilage-3-years-after-anterior-cruciate-ligament-reconstruction
#9
Chang-Wan Kim, Ali Hosseini, Lin Lin, Yang Wang, Martin Torriani, Thomas Gill, Alan J Grodzinsky, Guoan Li
Objective: To evaluate patient-specific patellofemoral joint (PFJ) cartilage 3 years postoperatively using T2 mapping magnetic resonance imaging and the uninjured contralateral side as control. Hypothesis: The cartilage of the PFJ in the anterior cruciate ligament (ACL) reconstructed knees would show increased T2 values compared to the uninjured contralateral knees at 3-year follow-up, and the femoral (trochlear) cartilage would be more susceptible than the patella in degeneration in ACL-reconstructed knees...
January 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29661110/alteration-of-gait-parameters-in-a-mouse-model-of-surgically-induced-knee-osteoarthritis
#10
Yuma Makii, Meiko Asaka, Susumu Setogawa, Soichiro Fujiki, Yoko Hosaka, Fumiko Yano, Hiroyuki Oka, Sakae Tanaka, Naoshi Fukui, Dai Yanagihara, Taku Saito
PURPOSE: Joint pain is the most common symptom of osteoarthritis (OA); however, its mechanism remains unclarified. The present study investigated hindlimb motion during locomotion on the treadmill using a three-dimensional (3D) motion analysis system with high-speed cameras to evaluate whether this method can be used as an indication of joint pain in a mouse model of surgically induced OA. METHODS: We resected the medial meniscus and medial collateral ligament in 8-week old C57BL/6 male mice and performed locomotion recording 6 months post-operatively...
May 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29658534/the-influence-of-osteoporotic-bone-structures-of-the-pelvic-hip-complex-on-stress-distribution-under-impact-load
#11
Katarzyna Arkusz, Tomasz Klekiel, Niezgoda Niezgoda, Romuald Będziński
PURPOSE: The aim of this study was to determine the effect of bone mineral density (BMD) on the stress distribution in pelvic-hip complex (PHC) model which included bone structures and soft tissues. Bone mass changes in osteoporosis and osteopenia were considered in this analysis. In addition, the relations between force direction and stress distribution causing PHC fractures were determined. METHODS: This paper presents the development and validation of a detailed 3D finite element model with high anatomical fidelity of the PHC and BMD changes in trabecular and cortical bones, modelled based on CT scans...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29657849/talar-process-fractures-an-overview-and-update-of-the-literature
#12
Haroon Majeed, Donald J McBride
Fractures of the lateral and the posterior processes of the talus are uncommon and frequently missed because of a low level of suspicion and difficulty in interpretation on plain radiographs. Missed fractures can lead to persistent pain and reduced function.Lateral process fractures are usually a consequence of forced dorsiflexion and inversion of fixed pronated foot. These are also commonly known as snowboarder's fractures.The posterior process of the talus is composed of medial and lateral tubercles, separated by the groove for the flexor hallucis longus tendon...
March 2018: EFORT open reviews
https://www.readbyqxmd.com/read/29657444/radial-axial-interosseous-load-rail-test-for-essex-lopresti-type-injuries
#13
REVIEW
Zachary C Lum, Eric G Huish, Marc A Trzeciak
Background: When approaching radial head and neck fractures, the decision for ORIF, resection, or arthroplasty is often performed intraoperatively. Factors that contribute include ligamentous and bony stability, cartilage injury, mechanical alignment as well as patient factors. Recent data has suggested conventional methods may not be sufficiently sensitive in detecting Essex Lopresti injuries. Here we describe an intraoperative technique that could objectively assess proximal radio-ulnar stability with subsequent disruption of the ligamentous structures...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29655900/the-anterolateral-ligament-is-a-distinct-ligamentous-structure-a-histological-explanation
#14
Thomas Neri, Pierre Dalcol, Fabien Palpacuer, Florian Bergandi, Jean Michel Prades, Frederic Farizon, Remi Philippot, Michel Peoc'h
BACKGROUND: The aim was to determine whether the anterolateral ligament (ALL) had a histological structure that defined it as a real ligament. METHODS: Histological examination of 30 ALL samples taken from fresh-frozen knees were performed. The ALL femoral insertion and its relationship with the lateral collateral ligament (LCL) were studied and the tibial insertion and its relationship with articular cartilage of the tibial joint surface were analyzed. For the ligamentous part, its histological structure and its differences with the articular capsule were studied...
April 11, 2018: Knee
https://www.readbyqxmd.com/read/29650413/taurine-protects-against-knee-osteoarthritis-development-in-experimental-rat-models
#15
Yiqun Bian, Meng Zhang, Kai Wang
BACKGROUND: Osteoarthritis (OA) is one of the complex diseases that affect a large population of the world. The aim of the current study was to explore the roles of taurine in OA rat models, and discover the related mechanisms. METHODS: OA rat models were established by anterior cruciate ligament transection (ACLT) plus medial meniscus resection (MMx) surgery on the right knees. Secondary mechanical allodynia, weight-bearing alterations and knee joint width were evaluated before surgery and every two weeks after surgery...
April 9, 2018: Knee
https://www.readbyqxmd.com/read/29628695/medical-textiles-in-orthopedics-an-overview
#16
REVIEW
Raju Vaishya, Amit Kumar Agarwal, Manish Tiwari, Abhishek Vaish, Vipul Vijay, Yash Nigam
The use of textile in the medical field is not new; this has given rise to a new branch known as medical textiles. These are being used to repair or replace various other musculoskeletal tissues. The most common uses of biomaterials are to create aseptic conditions for protection, general health care, and hygiene including bedding and clothing, surgical gowns, face masks, head and shoe covers, sterilization wraps, suture anchors, fiber cast and braces/orthotics. These are also used as materials for preparation of wipes, swabs, wound dressings, bandages, gauzes, plasters, pressure garments, orthopedic belts and for new applications, such as heart valves, vascular grafts, artificial veins, artificial ligaments, artificial joints, artificial skin, and artificial cartilage...
March 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29614621/three-dimensional-finite-element-analysis-of-the-influence-of-posterior-tibial-slope-on-the-anterior-cruciate-ligament-and-knee-joint-forward-stability
#17
Yong Qi, Hongtao Sun, Yueguang Fan, Feimeng Li, Yunting Wang, Chana Ge
OBJECTIVE: To explore the biomechanical influence of posterior tibial angle on the anterior cruciate ligament and knee joint forward stability. METHODS: The left knee joint of a healthy volunteer was scanned by CT and MRI. The data were imported into Mimics software to obtain 3D models of bone, cartilage, meniscus and ligament structures, and then Geomagic software was used to modify of the image. The relative displacement between tibia and femur and the stress of ACL were recorded...
March 23, 2018: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29613816/anterior-cruciate-ligament-reconstruction-affects-tibiofemoral-joint-congruency-during-dynamic-functional-movement
#18
Kanto Nagai, Tom Gale, James J Irrgang, Scott Tashman, Freddie H Fu, William Anderst
BACKGROUND: Anterior cruciate ligament reconstruction (ACLR) has been shown to alter kinematics, which may influence dynamic tibiofemoral joint congruency (a measure of how well the bone surfaces fit together). This may lead to abnormal loading of cartilage and joint degeneration. However, joint congruency after ACLR has never been investigated. HYPOTHESES: The ACLR knee will be more congruent than the contralateral uninjured knee, and dynamic congruency will increase over time after ACLR...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29589491/risk-factors-for-progression-of-articular-cartilage-damage-after-anatomical-anterior-cruciate-ligament-reconstruction
#19
A Nakamae, N Adachi, M Deie, M Ishikawa, T Nakasa, Y Ikuta, M Ochi
Aims To investigate the risk factors for progression of articular cartilage damage after anatomical anterior cruciate ligament (ACL) reconstruction. Patients and Methods A total of 174 patients who underwent second-look arthroscopic evaluation after anatomical ACL reconstruction were enrolled in this study. The graded condition of the articular cartilage at the time of ACL reconstruction was compared with that at second-look arthroscopy. Age, gender, body mass index (BMI), ACL reconstruction technique, meniscal conditions, and other variables were assessed by regression analysis as risk factors for progression of damage to the articular cartilage...
March 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29534754/early-detection-of-osteoarthritis-in-rabbits-using-mri-with-a-double-contrast-agent
#20
Okihiro Onishi, Kazuya Ikoma, Masamitsu Kido, Yukichi Kabuto, Keiichiro Ueshima, Ken-Ichi Matsuda, Masaki Tanaka, Toshikazu Kubo
BACKGROUND: Articular cartilage degeneration has been evaluated by magnetic resonance imaging (MRI). However, this method has several problems, including its time-consuming nature and the requirement of a high magnetic field or specialized hardware. The purpose of this study was to sequentially assess early degenerative changes in rabbit knee articular cartilage using MRI with a new double-contrast agent. METHODS: We induced osteoarthritis (OA) in the right knee of rabbits by anterior cruciate ligament transection and partial medial meniscectomy...
March 13, 2018: BMC Musculoskeletal Disorders
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