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Reconstruction of the. Spine

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https://www.readbyqxmd.com/read/28720989/trapezius-perforator-flap-for-reconstruction-of-a-posterior-cervical-defect
#1
Ricardo Nascimento, Joana Costa, Ricardo Horta, Álvaro Silva
The use of free flaps is considered the "gold standard" for reconstruction of head and neck defects. Locoregional flaps allows a better aesthetic result compared to free flaps, whenever there's an external skin defect. However the use of free flaps is not always adequate in the presence of preoperative comorbidities or previous surgeries. Since the description of the trapezius myocutaneous flap in the 1980's, many authors have published the results of the applicability of this flap in head and neck salvage reconstructive surgery...
April 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28718273/3d-quantitative-evaluation-of-spine-proprioceptive-perception-motor-control-through-instinctive-self-correction-manoeuvre-in-healthy-young-subjects-posture-an-observational-study
#2
Moreno D'Amico, Edyta Kinel, Piero Roncoletta
BACKGROUND: Conservative treatment in spine deformities and spine related disorders is mainly based on proper individual proprioceptive and motor control training. For these reasons, conservative treatment involves the stimulation of individual capability of perceiving/reducing deformities, blocks and/or improper spine posture by voluntary control. The literature describes that habitually adopted relaxed postures often exacerbate low back pain. Typically, youths can be referred to therapeutic programs aimed at improving the quality of body posture along with fostering the awareness of the importance of correct posture...
July 18, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28717599/improving-the-trajectory-of-transpedicular-transdiscal-lumbar-screw-fixation-with-a-computer-assisted-3d-printed-custom-drill-guide
#3
Zhen-Xuan Shao, Jian-Shun Wang, Zhong-Ke Lin, Wen-Fei Ni, Xiang-Yang Wang, Ai-Min Wu
Transpedicular transdiscal screw fixation is an alternative technique used in lumbar spine fixation; however, it requires an accurate screw trajectory. The aim of this study is to design a novel 3D-printed custom drill guide and investigate its accuracy to guide the trajectory of transpedicular transdiscal (TPTD) lumbar screw fixation. Dicom images of thirty lumbar functional segment units (FSU, two segments) of L1-L4 were acquired from the PACS system in our hospital (patients who underwent a CT scan for other abdomen diseases and had normal spine anatomy) and imported into reverse design software for three-dimensional reconstructions...
2017: PeerJ
https://www.readbyqxmd.com/read/28711208/applications-of-dual-energy-computed-tomography-for-artifact-reduction-in-the-head-neck-and-spine
#4
REVIEW
Eric Liao, Ashok Srinivasan
Conventional computed tomography (CT) uses a polychromatic energy beam to offer superb anatomic detail of the head and spine. However, technical challenges remain that can degrade the diagnostic image quality of these examinations. Dual-energy CT analyzes the changes in attenuation of soft tissues at different energy levels, from which different reconstructions can be made to yield the optimal contrast-to-noise ratio, reduce beam-hardening artifact, or evaluate tissue composition. In this article, selective applications of the dual energy CT technique are discussed, highlighting a powerful tool in the diagnostic CT evaluation of the head, neck, and spine...
August 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/28707527/diagnostic-usefulness-of-low-dose-lumbar-multi-detector-ct-with-iterative-reconstruction-in-trauma-patients-a-comparison-with-standard-dose-ct
#5
Sun Hwa Lee, Seong Jong Yun, Dong Hyeon Kim, Hyeon Hwan Jo, Jae Gwang Song, Yong Sung Park
OBJECTIVE: To compare the image quality (IQ), radiation dose, and diagnostic reliability of standard-dose and low-dose lumbar spine (L-spine) multi-detector CT (SDCT and LDCT, respectively) with iterative reconstruction (IR) in trauma patients. METHODS: We retrospectively analyzed the data of 263 consecutive patients (male:female, 133:130; mean age, 44.3 years) who underwent SDCT (200-300 mAs; 120 kVp) with IR (n=126) or LDCT (80-150 mAs; 120 kVp) with IR (n=137) for suspected L-spine fractures between November 2015 and September 2016...
July 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28688033/first-case-of-robotic-laparoendoscopic-single-site-radical-prostatectomy-with-single-site-vespa-platform
#6
D Mattevi, L G Luciani, V Vattovani, S Chiodini, M Puglisi, G Malossini
This study aimed at reporting our first experience with robotic laparoendoscopic single-site radical prostatectomy (R-LESS-RP) with single-site VesPa platform (Intuitive Surgical Inc.). A 68-year-old-man presenting with a cT1c adenocarcinoma Gleason Score 3 + 4 = 7 in 4/12 bilateral cores underwent a transperitoneal robotic LESS-RP with a single-site Vespa platform. Initial PSA, prostate weight, and body mass index (BMI) were 4.4 ng/ml, 45 g, and 25, respectively. Instruments and camera cross within the Single-Site port; the da Vinci System software detects and reassigns the user's hands with the instruments position...
July 7, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28678130/outcomes-and-complications-of-reconstruction-with-use-of-free-vascularized-fibular-graft-for-spinal-and-pelvic-defects-following-resection-of-a-malignant-tumor
#7
Matthew T Houdek, Peter S Rose, Karim Bakri, Eric R Wagner, Michael J Yaszemski, Franklin H Sim, Steven L Moran
BACKGROUND: Following resection of malignant tumors of the spine and pelvis, reconstructive surgeons often face large structural defects. Unlike reconstruction in the extremities, wherein a free vascularized fibular graft (FVFG) is a highly utilized option for segmental osseous reconstruction, there are limited data on the use of an FVFG in the spine and pelvis. The aim of this study was to review our institution's experience with reconstruction with use of an FVFG following oncological resection in the spine and pelvis...
July 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28671878/application-of-low-dose-stereoradiography-in-in-vivo-vertebral-morphologic-measurements-comparison-with-computed-tomography
#8
Saba Pasha, Tom Schlösser, Xiaowei Zhu, Xochitl Mellor, René Castelein, John Flynn
BACKGROUND: Though computed tomography (CT) and 3 dimensional (3D) reconstruction of the spine and ribcage are powerful techniques for detailed monitoring of spinal growth and surgical planning of patients, drawbacks can arise. We explored the application of low-dose stereoradiography of the spine to calculate distinct morphologic parameters of the vertebral body in a juvenile patient population with early-onset scoliosis or congenital scoliosis. This study compares the 3D vertebral morphology measurements using low-dose stereoradiography with the currently accepted imaging modality for such measurements, CT scans...
June 30, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28668408/metal-artifact-reduction-by-dual-layer-computed-tomography-using-virtual-monoenergetic-images
#9
Victor Neuhaus, Nils Große Hokamp, Nuran Abdullayev, Robert Rau, Anastasios Mpotsaris, David Maintz, Jan Borggrefe
OBJECTIVE: The aim of the study was to investigate the performance and diagnostic value of metal artifact reduction in virtual monoenergetic images generated from dual-layer computed tomography (DLCT). METHODS: 35 patients that received a DLCT at the University Hospital Cologne and had an orthopedic implant in the examined region were included in this study. For each DLCT virtual monoenergetic images of different energy levels (64keV, 70keV, 105keV, 140keV, 200keV and an optimized photon energy) were reconstructed and analyzed by three blinded observers...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28665245/prophylactic-use-of-intraoperative-vancomycin-powder-and-postoperative-infection-an-analysis-of-microbiological-patterns-in-1200-consecutive-surgical-cases
#10
Owoicho Adogwa, Aladine A Elsamadicy, Amanda Sergesketter, Victoria D Vuong, Ankit I Mehta, Raul A Vasquez, Joseph Cheng, Carlos A Bagley, Isaac O Karikari
OBJECTIVE Wound infections following spinal surgery for deformity place a high toll on patients, providers, and the health care system. The prophylactic application of intraoperative vancomycin powder has been shown to lower the infection risk after thoracolumbar decompression and fusion for deformity correction. The purpose of this study was to assess the microbiological patterns of postoperative surgical site infections (SSIs) after prophylactic use of vancomycin powder in adult patients undergoing spinal deformity surgery...
June 30, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28662894/medial-patellofemoral-ligament-medial-patellotibial-ligament-and-medial-patellomeniscal-ligament-anatomic-histologic-radiographic-and-biomechanical-study
#11
Betina B Hinckel, Riccardo G Gobbi, Marco K Demange, Cesar Augusto M Pereira, Jose Ricardo Pécora, Renato Jose M Natalino, Luciana Miyahira, Bruno S Kubota, Gilberto Luis Camanho
PURPOSE: To describe the anatomy (quantitative macroscopic and histologic), radiographic parameters of the insertions, and biomechanical characteristics of the medial ligamentous restrictors of the patella (medial patellofemoral ligament [MPFL], medial patellotibial ligament [MPTL], and medial patellomeniscal ligament [MPML]) in cadaveric knees. Because the MPTL and the MPML are not as well known as the MPFL, they were the focus of this study. METHODS: MPFLs, MPTLs, and MPMLs from 9 knees were dissected...
June 26, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28662423/biomechanical-research-on-contour-cage-with-transacetabular-screws-fixation-in-revision-total-hip-arthroplasty
#12
Haobo Wu, Chiyuan Ma, Jisheng Ran, Danfeng Xu, An Liu, Miao Sun, Lidong Wu, Shigui Yan
BACKGROUND: Use biomechanical technique to access the strain distribution and stability of Contour anti-protrusion cage with or without the whole circumference acetabular cup fixation by the transacetabular screws. METHODS: Pelvic specimens from 10 male cadavers were used for the biomechanical test. The models of type C bone defect were copied according to the AAOS classification. Group 1: the contour reconstruction ring was fixed only by flange screws; Group 2: the contour reconstruction ring was fixed both by flange screws and transacetabular screws in dome...
June 21, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28662210/three-dimensional-spatial-modeling-of-spines-along-dendritic-networks-in-human-cortical-pyramidal-neurons
#13
Laura Anton-Sanchez, Pedro Larrañaga, Ruth Benavides-Piccione, Isabel Fernaud-Espinosa, Javier DeFelipe, Concha Bielza
We modeled spine distribution along the dendritic networks of pyramidal neurons in both basal and apical dendrites. To do this, we applied network spatial analysis because spines can only lie on the dendritic shaft. We expanded the existing 2D computational techniques for spatial analysis along networks to perform a 3D network spatial analysis. We analyzed five detailed reconstructions of adult human pyramidal neurons of the temporal cortex with a total of more than 32,000 spines. We confirmed that there is a spatial variation in spine density that is dependent on the distance to the cell body in all dendrites...
2017: PloS One
https://www.readbyqxmd.com/read/28660437/optimization-of-technique-for-insertion-of-implants-at-the-supra-acetabular-corridor-in-pelvis-and-acetabular-surgery
#14
Theodoros H Tosounidis, Cyril Mauffrey, Peter V Giannoudis
The technique for application of implants at the sciatic buttress has been well described in the pelvic and acetabular fracture reconstruction literature. We described a new use of the inlet-obturator oblique view for the identification of the anterior inferior iliac spine, which is the entry point of implants, and we provide a detailed fluoroscopic and radiographic description of this view. A small series of 15 patients who underwent an application of an anterior inferior pelvic external (supra-acetabular) fixator via this technique is presented...
June 28, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28660110/assessing-foraminal-stenosis-in-the-cervical-spine-a-comparison-of-three-dimensional-computed-tomographic-surface-reconstruction-to-two-dimensional-modalities
#15
Adam Schell, John M Rhee, John Holbrook, Eric Lenehan, Kun Young Park
STUDY DESIGN: Retrospective radiographic study. OBJECTIVE: The optimal radiographic modality for assessing cervical foraminal stenosis is unclear. Determination on conventional axial cuts is made difficult due in part to the complex, oblique orientation of the cervical neuroforamen. The utility of 3-dimensonal (3D) computed tomography (CT) reconstruction in improving neuroforaminal assessment is not well understood. The objective of this study is to determine inter-rater variability in grading cervical foraminal stenosis using 3 different CT imaging modalities: 3D CT surface reconstructions (3DSR), 2D sagittal oblique multiplanar reformations (2D-SOMPR), and conventional 2D axial CT imaging...
May 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28658939/use-of-stereovision-for-intraoperative-coregistration-of-a-spinal-surgical-field-a-human-feasibility-study
#16
S Scott Lollis, Xiaoyao Fan, Linton Evans, Jonathan D Olson, Keith D Paulsen, David W Roberts, Sohail K Mirza, Songbai Ji
BACKGROUND: The use of image guidance during spinal surgery has been limited by several anatomic factors such as intervertebral segment motion and ineffective spine immobilization. In its current form, the surgical field is coregistered with a preoperative computed tomography (CT), often obtained in a different spinal confirmation, or with intraoperative cross-sectional imaging. Stereovision offers an alternative method of registration. OBJECTIVE: To demonstrate the feasibility of stereovision-mediated coregistration of a human spinal surgical field using a proof-of-principle study, and to provide preliminary assessments of the technique's accuracy...
June 27, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28658132/emergency-1-stage-anterior-approach-for-cervical-spine-infection-complicated-by-epidural-abscess
#17
Haoxi Li, Zhaoxiong Chen, Zhiyao Yong, Xinhua Li, Yufeng Huang, Desheng Wu
It was a retrospective analysis.The aim of the study was to explore the safety and reliability of emergency 1-stage radical debridement and reconstruction using titanium mesh filled with autologous bone for patients with cervical spine infection complicated by epidural abscess.At present, cervical spine infection complicated by epidural abscess is known as a severe spine disease. Recently, case report of this disease is showing quite an increasing tendency, particularly in economically undeveloped areas and countries...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28656505/videoexoscopic-real-time-intraoperative-navigation-for-spinal-neurosurgery-a-novel-co-adaptation-of-two-existing-technology-platforms-technical-note
#18
Meng Huang, Sean Michael Barber, William James Steele, Zain Boghani, Viren Rajendrakumar Desai, Gavin Wayne Britz, George Alexander West, Todd Wilson Trask, Paul Joseph Holman
Image-guided approaches to spinal instrumentation and interbody fusion have been widely popularized in the last decade [1-5]. Navigated pedicle screws are significantly less likely to breach [2, 3, 5, 6]. Navigation otherwise remains a point reference tool because the projection is off-axis to the surgeon's inline loupe or microscope view. The Synaptive robotic brightmatter drive videoexoscope monitor system represents a new paradigm for off-axis high-definition (HD) surgical visualization. It has many advantages over the traditional microscope and loupes, which have already been demonstrated in a cadaveric study [7]...
June 27, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28648003/-curative-effect-analysis-of-15-cases-of-cervical-intra-and-extra-spinal-tumors-by-microsurgical-resection
#19
Y Han, X L Zheng, L Li, Z Q Jiang, F Y Lou, S J Zhang
Objective: To explore the curative effect of microsurgical treatment of cervical intra- and extra-spinal tumors. Methods: The clinical data of 15 patients with cervical intra-and extra-spinal tumors in Department of Neurosurgery, the First Affiliated Hospital of Bengbu Medical College from January 2013 to February 2017 were retrospectively analyzed. According to Shaw's tumor stage: 6 cases in stage Ⅰ, 5 cases in stage Ⅱ, 3 cases in stage Ⅲ, and 1 case in stage Ⅳ. About the surgical methods: 9 cases were treated via posterior median semi-laminectomy approach, of which were internal fixation in 2 cases, and via posterior median approach spinous process and vertebral plate complex orthotopic replantation to spinal canal plasty in 3 cases, other 3 cases were operated via anterior cervical approach, including internal fixation in 1 case...
June 20, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28640112/cement-leakage-in-osteoporotic-vertebral-compression-fractures-with-cortical-defect-using-high-viscosity-bone-cement-during-unilateral-percutaneous-kyphoplasty-surgery
#20
Tie Liu, Zhe Li, Qingjun Su, Yong Hai
The purpose of this study was to investigate cement leakage (CL) in osteoporotic vertebral compression fractures (OVCFs) with cortical defect using high-viscosity bone cement during unilateral percutaneous kyphoplasty (PKP) surgery.This study included a series of 77 patients (23 males, 54 females) with single level osteoporotic vertebral body fracture (OVCF) who underwent unilateral PKP in our hospital. Preoperative x-ray, computed tomography (CT) scan, and 3-dimensional reconstructions were studied. During the PKP procedure, needle was carefully put to avoid too near to the cortical defect according to CT image...
June 2017: Medicine (Baltimore)
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