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https://www.readbyqxmd.com/read/29780619/hip-arthroscopy-for-femoroacetabular-impingement
#1
Rima Nasser, Benjamin Domb
The purpose of this article is to give a general overview of femoroacetabular impingement (FAI) and how it could be treated arthroscopically, with some details about indications, the procedure itself and some of the complications associated with the surgery.FAI is a dynamic condition of the hip that can be a source of pain and disability and could potentially lead to arthritis.When symptomatic, and if conservative treatment fails, FAI can be addressed surgically.The goal of surgical treatment for FAI is to recreate the spherical contour of the femoral head, improve femoral offset, normalize coverage of the acetabulum, repair/reconstruct chondral damage and repair/reconstruct the labrum to restore normal mechanics and joint sealing...
April 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29777779/bilateral-total-mandibular-reconstruction-with-patient-specific-implants-for-temporomandibular-joint-ankylosis
#2
Jorge Chaurand
Temporomandibular joint (TMJ) ankylosis is a complex entity that requires accurate diagnosis and prompt treatment. Multiple surgical modalities have been proposed to treat TMJ ankylosis, including gap arthroplasty, interpositional arthroplasty, and total joint reconstruction. This article is to report one treated with patient specific implants due to its complexity, technical considerations are presented and could be an option for patients with similar conditions requiring this type of complicated treatment...
May 16, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29772190/serum-metal-levels-in-maxillofacial-reconstructive-surgery-patients-a-pilot-study
#3
Louis G Mercuri, Michael Miloro, Anastasia K Skipor, Divya Bijukumar, Cortino Sukotjo, Mathew T Mathew
PURPOSE: The aim of this pilot study was to assay metal concentrations in the serum of patients who had undergone dental implant placement, orthognathic surgery using rigid metal fixation plates and screws, and total temporomandibular joint replacement (TMJ TJR). MATERIALS AND METHODS: Thirty patients were identified and included in this pilot study. Sixteen patients (9 men and 8 women), with an average age of 44 years (range, 19 to 79 yr), provided informed consent to participate and were divided into 3 study groups with 4 patients in each (group 1, orthognathic surgery; group 2, TMJ TJR; and group 3, dental implant placement)...
April 21, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29771398/a-cadaveric-study-of-the-mean-distance-of-the-radial-artery-during-the-approach-to-the-first-carpometacarpal-joint
#4
Baris Yildirim, Daniel E Hess, Jesse B Seamon, Matthew L Lyons, A Rashard Dacus
Multiple surgical procedures have been described to treat first carpometacarpal (CMC) arthritis. Although the superiority of one procedure over the others continues to be a controversial topic, they all approach the trapezium and require careful attention to the surrounding structures. One potential complication is injury to the radial artery, which lies in close proximity to the trapezium and is often encountered during surgical approach. Using cadaveric specimens, the authors dissected to identify and isolate the radial artery as it travels in the forearm, wrist, and hand while being careful not to disturb its native course...
May 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29770342/fibular-collateral-ligament-varus-stress-radiographic-analysis-using-3-different-clinical-techniques
#5
Patrick W Kane, Mark E Cinque, Gilbert Moatshe, Jorge Chahla, Nicholas N DePhillipo, Matthew T Provencher, Robert F LaPrade
Background: Fibular collateral ligament (FCL) tears are challenging to diagnose. Left untreated, FCL tears lead to residual ligament instability and increased joint loading on the medial compartment of the knee. Additionally, when a concomitant anterior cruciate ligament (ACL) reconstruction is performed, increased forces on reconstruction grafts occur, which may lead to premature graft failure. Stress radiographs constitute a reliable and validated technique for the objective assessment of a complete grade III FCL tear...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29769463/the-kinematic-recovery-process-of-rhesus-monkeys-after-spinal-cord-injury
#6
Rui-Han Wei, Can Zhao, Jia-Sheng Rao, Wen Zhao, Xia Zhou, Peng-Yu Tian, Wei Song, Run Ji, Ai-Feng Zhang, Zhao-Yang Yang, Xiao-Guang Li
After incomplete spinal cord injury (SCI), neural circuits may be plastically reconstructed to some degree, resulting in extensive functional locomotor recovery. The present study aimed to observe the post-SCI locomotor recovery of rhesus monkey hindlimbs and compare the recovery degrees of different hindlimb parts, thus revealing the recovery process of locomotor function. Four rhesus monkeys were chosen for thoracic hemisection injury. The hindlimb locomotor performance of these animals was recorded before surgery, as well as 6 and 12 weeks post-lesion...
May 16, 2018: Experimental Animals
https://www.readbyqxmd.com/read/29769139/double-bundle-anterior-cruciate-ligament-reconstruction-improves-tibial-rotational-instability-analysis-of-squatting-motion-using-a-2d-3d-registration-technique
#7
Kenichi Kidera, Akihiko Yonekura, Takeshi Miyaji, Yusuke Nakazoe, Kazuyoshi Gamada, Kei Yoneta, Futoshi Ikuta, Masato Tomita, Takashi Miyamoto, Shiro Kajiyama, Akira Hozumi, Ko Chiba, Narihiro Okazaki, Takayuki Shida, Makoto Osaki
BACKGROUND: The anterior cruciate ligament-deficient (ACLD) knee requires appropriate treatment for the patient to return to sports. The purpose of this study was to clarify the kinematics of the anterior cruciate ligament-deficient knee in squatting motion before and after double-bundle anterior cruciate ligament reconstruction (DB-ACLR) using a 2D/3D registration technique. METHODS: The subjects of this study were 10 men with confirmed unilateral ACL rupture who underwent DB-ACLR...
May 16, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29768929/current-concepts-in-revision-hip-arthroscopy
#8
Renato Locks, Ioanna Bolia, Hajime Utsunomiya, Karen Briggs, Marc J Philippon
Hip arthroscopy is an evolving procedure and its indications have expanded. The number of patients undergoing this procedure has increased significantly as well as the number of surgeons being trained. This has resulted in a notable increase in post-operative complication rates creating the need to develop advanced hip arthroscopic techniques. Revision hip arthroscopy is often complex and many factors should be considered to achieve a satisfactory clinical outcome. Careful pre-operative planning and agreement of expectations between the physician and patient regarding the procedure are important...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29767809/pediatric-anterior-cruciate-ligament-reconstruction
#9
Alexia G Gagliardi, Jay C Albright
The rate of anterior cruciate ligament (ACL) ruptures diagnosed among the pediatric and adolescent population is increasing. The rise in ACL injuries may be attributed to earlier sports specialization, year-round sports participation, increased awareness, and improved ability to diagnose the injury. Treatment options for pediatric or adolescent ACL injuries include nonoperative conservative treatment, ACL repair, or various techniques for ACL reconstruction. The best course of treatment for ACL rupture in young patients continues to be debated...
May 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29764366/phylogenetic-signal-from-rearrangements-in-18-anopheles-species-by-joint-scaffolding-extant-and-ancestral-genomes
#10
Yoann Anselmetti, Wandrille Duchemin, Eric Tannier, Cedric Chauve, Sèverine Bérard
BACKGROUND: Genomes rearrangements carry valuable information for phylogenetic inference or the elucidation of molecular mechanisms of adaptation. However, the detection of genome rearrangements is often hampered by current deficiencies in data and methods: Genomes obtained from short sequence reads have generally very fragmented assemblies, and comparing multiple gene orders generally leads to computationally intractable algorithmic questions. RESULTS: We present a computational method, ADSEQ, which, by combining ancestral gene order reconstruction, comparative scaffolding and de novo scaffolding methods, overcomes these two caveats...
May 9, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29762285/cone-beam-computed-tomography-guided-navigation-in-complex-osteotomies-improves-accuracy-at-all-competence-levels-a-study-assessing-accuracy-and-reproducibility-of-joint-sparing-bone-cuts
#11
Amir Sternheim, Aidin Kashigar, Michael Daly, Harley Chan, Jimmy Qiu, Robert Weersink, David Jaffray, Jonathan C Irish, Peter C Ferguson, Jay S Wunder
BACKGROUND: The objective of this study was to assess the accuracy and reproducibility of a novel cone-beam computed tomography (CBCT)-guided navigation system designed for osteotomies with joint-sparing bone cuts. METHODS: Eighteen surgeons participated in this study. First, 3 expert tumor surgeons resected bone tumors in 3 Sawbones tumor models identical to actual patient scenarios. They first performed these osteotomies without navigation and then performed them using a navigation system and 3-dimensional (3D) planning tools based on CBCT imaging...
May 16, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29761322/concurrent-risk-reduction-surgery-in-patients-with-increased-lifetime-risk-for-breast-and-ovarian-cancer-an-analysis-of-the-national-surgical-quality-improvement-program-nsqip-database
#12
Maryam Elmi, Arash Azin, Ahmad Elnahas, David R McCready, Tulin D Cil
BACKGROUND: Patients with genetic susceptibility to breast and ovarian cancer are eligible for risk-reduction surgery. Surgical morbidity of risk-reduction mastectomy (RRM) with concurrent bilateral salpingo-oophorectomy (BSO) is unknown. Outcomes in these patients were compared to patients undergoing RRM without BSO using a large multi-institutional database. METHODS: A retrospective cohort analysis was conducted using the American College of Surgeon's National Surgical Quality Improvement Program (NSQIP) 2007-2016 datasets, comparing postoperative morbidity between patients undergoing RRM with patients undergoing RRM with concurrent BSO...
May 14, 2018: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29761106/current-strategies-and-future-directions-to-optimize-acl-reconstruction-in-adolescent-patients
#13
Dustin Jon Richter, Roger Lyon, Scott Van Valin, Xue-Cheng Liu
The incidence of anterior cruciate ligament (ACL) injuries in the pediatric population has risen in recent years. These injuries have historically presented a management dilemma in skeletally immature patients with open physes and significant growth remaining at time of injury. While those nearing skeletal maturity may be treated with traditional, transphyseal adult techniques, these same procedures risk iatrogenic damage to the growth plates and resultant growth disturbances in younger patients with open physes...
2018: Frontiers in Surgery
https://www.readbyqxmd.com/read/29758411/eds-tomographic-reconstruction-regularized-by-total-nuclear-variation-joined-with-haadf-stem-tomography
#14
Zhichao Zhong, Willem Jan Palenstijn, Jonas Adler, K Joost Batenburg
Energy-dispersive X-ray spectroscopy (EDS) tomography is an advanced technique to characterize compositional information for nanostructures in three dimensions (3D). However, the application is hindered by the poor image quality caused by the low signal-to-noise ratios and the limited number of tilts, which are fundamentally limited by the insufficient number of X-ray counts. In this paper, we explore how to make accurate EDS reconstructions from such data. We propose to augment EDS tomography by joining with it a more accurate high-angle annular dark-field STEM (HAADF-STEM) tomographic reconstruction, for which usually a larger number of tilt images are feasible...
May 5, 2018: Ultramicroscopy
https://www.readbyqxmd.com/read/29758101/model-based-reconstruction-for-simultaneous-multislice-and-parallel-imaging-accelerated-multishot-diffusion-tensor-imaging
#15
Zijing Dong, Erpeng Dai, Fuyixue Wang, Zhe Zhang, Xiaodong Ma, Chun Yuan, Hua Guo
PURPOSE: Multishot interleaved echo-planar imaging (iEPI) can achieve higher image resolution than single-shot EPI for diffusion-tensor imaging (DTI), but its application is limited by the prolonged acquisition time. To reduce the acquisition time, a novel model-based reconstruction for simultaneous multislice (SMS) and parallel imaging (PI) accelerated iEPI DTI is proposed. MATERIALS AND METHODS: DTI datasets acquired by iEPI with SMS and PI acceleration can be regarded as 3D k-space data, which is undersampled along both the slice and phase encoding directions...
May 14, 2018: Medical Physics
https://www.readbyqxmd.com/read/29755840/treatment-of-mallet-finger-deformity-with-a-modified-palmaris-longus-tendon-graft-through-a-bone-tunnel
#16
Zengbing Liu, Kai Ma, Dong Huang
OBJECTIVE: To investigate the clinical effect of treating mallet finger deformity using a modified palmaris longus tendon graft through a bone tunnel. METHODS: Altogether, 21 patients with mallet finger deformity (16 men, 5 women; average age 31 years, range 19-47 years) were treated with a modified palmaris longus tendon graft through a bone tunnel during 18 months (2014-2016). Four index fingers, seven middle fingers, eight ring fingers, and two little fingers were treated for four cutting injuries, eleven finger sprains, four crush injuries, and two twist injuries (7 open and 14 closed injuries)...
2018: International Journal of Burns and Trauma
https://www.readbyqxmd.com/read/29752384/a-regulatory-pathway-involving-retinoic-acid-and-calcineurin-demarcates-and-maintains-joint-cells-and-osteoblasts-in-the-fin-regenerate
#17
Stephanie C McMillan, Jing Zhang, Hue-Eileen Phan, Shirine Jeradi, Leona Probst, Matthias Hammerschmidt, Marie-Andrée Akimenko
During zebrafish fin regeneration, blastema cells lining the epidermis differentiate into osteoblasts and joint cells to reconstruct the segmented bony rays. We show that osteoblasts and joint cells originate from a common cell lineage, but are committed to different cell fates. Pre-osteoblasts expressing runx2a/b commit to the osteoblast lineage upon expressing sp7 , while the strong upregulation of hoxa13a correlates with a commitment to a joint cell type. In the distal regenerate, hoxa13a , evx1, and pthlha are sequentially upregulated at regular intervals to define the newly identified presumptive joint cells...
May 11, 2018: Development
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#18
M Bourgain, S Hybois, P Thoreux, O Rouillon, P Rouch, C Sauret
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29749751/visual-motor-control-of-drop-landing-after-anterior-cruciate-ligament-reconstruction
#19
Dustin R Grooms, Ajit Chaudhari, Stephen J Page, Deborah S Nichols-Larsen, James A Onate
CONTEXT:   Visual feedback is crucial in the control of human movement. When vision is obstructed, alterations in landing neuromuscular control may increase movements that place individuals at risk for injury. Anterior cruciate ligament (ACL) injury may further alter the motor-control response to alterations in visual feedback. The development of stroboscopic glasses that disrupt visual feedback without fully obscuring it has enabled researchers to assess visual-motor control during movements that simulate the dynamic demands of athletic activity...
May 11, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29747677/use-of-clinical-and-computed-tomography-findings-to-assess-long-term-unsatisfactory-outcome-after-femoral-head-and-neck-ostectomy-in-four-large-breed-dogs
#20
Ciprian Ober, Cosmin Pestean, Lucia Bel, Marian Taulescu, Joshua Milgram, Adrian Todor, Rodica Ungur, Mirela Leșu, Liviu Oana
Femoral head and neck ostectomy (FHNO) is a salvage surgical procedure intended to eliminate hip joint laxity associated pain in the immature dog, or pain due to secondary osteoarthritis in the mature dog. The outcome of the procedure is associated with the size of the dog but the cause of a generally poorer outcome in larger breeds has not been determined. The objective of this study was to assess the long-term results of FHNO associated with unsatisfactory functional outcome by means of clinical examination and computed tomography (CT) scanning...
May 10, 2018: Acta Veterinaria Scandinavica
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