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https://www.readbyqxmd.com/read/28215460/early-experience-with-lateral-lumbar-total-disc-replacement-utility-complications-and-revision-strategies
#1
Gregory M Malham, Rhiannon M Parker
Lumbar total disc replacement (TDR) is an alternative to interbody fusion for the treatment of symptomatic degenerative disc disease. Traditionally, lumbar TDR is performed via an anterior retroperitoneal approach with regional risks of vascular and visceral injury. The direct lateral retroperitoneal, transpsoas approach avoids mobilisation of the great vessels and preserves the anterior longitudinal ligament, thereby maintaining physiological limits on motion. This study aimed to (i) report one site's early experience with lateral lumbar TDR and (ii) provide case examples illustrating the utility, complications and revision strategies of the XL-TDR device...
February 16, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28210626/osteogenic-differentiation-capacity-of-in-vitro-cultured-human-skeletal-muscle-for-expedited-bone-tissue-engineering
#2
Chunlei Miao, Lulu Zhou, Lufeng Tian, Yingjie Zhang, Wei Zhang, Fanghong Yang, Tianyi Liu, Shengjian Tang, Fangjun Liu
Expedited bone tissue engineering employs the biological stimuli to harness the intrinsic regenerative potential of skeletal muscle to trigger the reparative process in situ to improve or replace biological functions. When genetically modified with adenovirus mediated BMP2 gene transfer, muscle biopsies from animals have demonstrated success in regenerating bone within rat bony defects. However, it is uncertain whether the human adult skeletal muscle displays an osteogenic potential in vitro when a suitable biological trigger is applied...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28198781/biomechanical-analysis-of-two-level-cervical-disc-replacement-with-a-stand-alone-u-shaped-disc-implant
#3
Yang Li, Guy R Fogel, Zhenhua Liao, Rajnesh Tyagi, Gaolong Zhang, Weiqiang Liu
STUDY DESIGN: Biomechanical study using a three-dimensional nonlinear finite element (FE) model. OBJECTIVE: To analyze biomechanical changes with three prostheses based on two-level arthroplasty and to verify the biomechanical efficiency of dynamic cervical implants (DCIs) with a stand-alone U-shaped structure. SUMMARY OF BACKGROUND DATA: Few studies have compared biomechanical behavior of various prostheses as they relate to clinical results after two-level total disc replacement (TDR)...
February 14, 2017: Spine
https://www.readbyqxmd.com/read/28183604/wear-behaviour-of-uhmwpe-reinforced-by-carbon-nanofiller-and-paraffin-oil-for-joint-replacement
#4
Samy Yousef, Annamaria Visco, Giovanna Galtieri, Davide Nocita, Claudia Espro
The majority of artificial joints incorporate biomedical grade Ultra High Molecular Weight Poly Ethylene (UHMWPE), whose wear is considered most important in controlling service time of the whole joint. The aim of this work was to improve wear resistance of UHMWPE through the addition of 0.5-2.0wt% of Carbon Nano Filler (CNF) and 2% wt of Paraffin Oil (PO) using ball milling (BM) and extrusion techniques (EX). The wear tests on these nanocomposites were conducted by a pin on disc in dry (air) and wet media (simulated synovial fluid or artificial lubricant, and bovine synovial fluid or natural lubricant)...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28178135/durability-of-cervical-disc-arthroplasties-and-its-influence-factors-a-systematic-review-and-a-network-meta-analysis
#5
Chao Chen, Xiaolin Zhang, Xinlong Ma
BACKGROUND: The durability of cervical disc arthroplasties (CDA) may vary significantly because of different designs and implanting techniques of the devices. Nevertheless, the comparative durability remains unknown. OBJECTIVES: We aimed to assess the durability of CDAs in at least 2-year follow-up. We analyzed the classifications and causes of secondary surgical procedures, as well as the structural designs of the devices that might influence the durability. METHODS: PubMed, Medline, Embase, and Cochrane Central Register of Controlled Trials were searched from the inception of each database to September 2015 using the following Keywords: "cervical disc replacement" OR "cervical disc arthroplasty" AND "randomized controlled trial (RCT)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28175530/342%C3%A2-lumbar-total-disc-replacement-by-the-lateral-approach-up-to-10-year-follow-up
#6
Luiz Pimenta, Luis Marchi, Rodrigo Augusto Amaral, Leonardo Oliveira, Joes Nogueira-Neto, Rubens Jensen, Etevaldo Coutinho
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
https://www.readbyqxmd.com/read/28175519/345%C3%A2-elective-anterior-cervical-discectomy-and-fusion-vs-cervical-artificial-disc-replacement-a-comparison-of-perioperative-morbidity-and-early-outcomes
#7
Pavan S Upadhyayula, John K Yue, Reid Hoshide, Erik Curtis, Joseph D Ciacci
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
https://www.readbyqxmd.com/read/28142281/adjacent-level-arthroplasty-following-cervical-fusion
#8
Deshpande V Rajakumar, Akshay Hari, Murali Krishna, Subhas Konar, Ankit Sharma
OBJECTIVE Adjacent-level disc degeneration following cervical fusion has been well reported. This condition poses a major treatment dilemma when it becomes symptomatic. The potential application of cervical arthroplasty to preserve motion in the affected segment is not well documented, with few studies in the literature. The authors present their initial experience of analyzing clinical and radiological results in such patients who were treated with arthroplasty for new or persistent arm and/or neck symptoms related to neural compression due to adjacent-segment disease after anterior cervical discectomy and fusion (ACDF)...
February 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28142261/thirty-day-readmission-and-reoperation-rates-after-single-level-anterior-cervical-discectomy-and-fusion-versus-those-after-cervical-disc-replacement
#9
Niketh Bhashyam, Rafael De la Garza Ramos, Jonathan Nakhla, Rani Nasser, Ajit Jada, Taylor E Purvis, Daniel M Sciubba, Merritt D Kinon, Reza Yassari
OBJECTIVE The goal of this study was to compare 30-day readmission and reoperation rates after single-level anterior cervical discectomy and fusion (ACDF) versus those after cervical disc replacement (CDR). METHODS The authors used the 2013-2014 American College of Surgeons National Surgical Quality Improvement Program database. Included were adult patients who underwent first-time single-level ACDF or CDR for cervical spondylosis or disc herniation. Primary outcome measures were readmission and/or reoperation within 30 days of the original surgery...
February 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28142258/bone-loss-of-vertebral-bodies-at-the-operative-segment-after-cervical-arthroplasty-a-potential-complication
#10
Dong Hwa Heo, Dong Chan Lee, Jong Yang Oh, Choon Keun Park
OBJECTIVE Bony overgrowth and spontaneous fusion are complications of cervical arthroplasty. In contrast, bone loss or bone remodeling of vertebral bodies at the operation segment after cervical arthroplasty has also been observed. The purpose of this study is to investigate a potential complication-bone loss of the anterior portion of the vertebral bodies at the surgically treated segment after cervical total disc replacement (TDR)-and discuss the clinical significance. METHODS All enrolled patients underwent follow-up for more than 24 months after cervical arthroplasty using the Baguera C disc...
February 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28142245/cervical-arthroplasty-what-does-the-labeling-say
#11
Mazda K Turel, Mena G Kerolus, Owoicho Adogwa, Vincent C Traynelis
OBJECTIVE The aim of this paper was to comprehensively review each of the Food and Drug Administration (FDA)-approved labels of 7 total cervical disc replacements, assess the exact methodology in which the trial was conducted, and provide a broad comparison of these devices to allow each surgeon to determine which disc best suits his or her specific treatment goals based on the specific labels and not the studies published. METHODS The FDA-approved labels for each of the 7 artificial discs were obtained from the official FDA website...
February 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28125523/machine-learning-based-classification-of-38-years-of-spine-related-literature-into-100-research-topics
#12
David C Sing, Lionel N Metz, Stefan Dudli
STUDY DESIGN: Retrospective review. OBJECTIVE: To identify the top 100 spine research topics. SUMMARY OF BACKGROUND DATA: Recent advances in "machine learning," or computers learning without explicit instructions, have yielded broad technological advances. Topic modeling algorithms can be applied to large volumes of text to discover quantifiable themes and trends. METHODS: Abstracts were extracted from the National Library of Medicine PubMed database from five prominent peer-reviewed spine journals (European Spine Journal [ESJ], The Spine Journal [SpineJ], Spine, Journal of Spinal Disorders and Techniques [JSDT], Journal of Neurosurgery: Spine [JNS])...
January 25, 2017: Spine
https://www.readbyqxmd.com/read/28108424/clinical-and-radiological-findings-after-multilevel-cervical-total-disc-replacement-defining-radiological-changes-to-predict-surgical-outcomes
#13
Jung Hwan Lee, Sang-Ho Lee, Jun Ho Lee
OBJECTIVE: This study compared the radiological parameters between preoperation and postoperation for patients who underwent multilevel cervical total disc replacement (MCTDR) and assessed which parameters were related to successful clinical outcomes after MCTDR. METHODS: The study included a consecutive series of 24 patients who were treated with MCTDR following the diagnosis of multilevel cervical disc herniation or stenosis. Numeric Rating Scale (NRS), C2-7 sagittal vertical axis (SVA), range of motion (ROM) of C2-7 segment and TDR implanted levels were evaluated at pre- and post-TDR...
January 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28090406/leaf-disc-grafting-for-the-transmission-of-candidatus-liberibacter-asiaticus-in-citrus-citrus-sinensis-rutaceae-seedlings
#14
Flavia Tabay Zambon, Karen Plant, Ed Etxeberria
PREMISE OF THE STUDY: The search for resistance/tolerance to the devastating citrus huanglongbing disease (syn. HLB or citrus greening) is generating an increasing number of new plants of diverse genetic makeup. As the increasing number of new plants require more space, resources, and time, the need for faster and more efficient HLB screening tests becomes crucial. METHODS AND RESULTS: The leaf-disc grafting system described here consists in replacing a disc of leaf tissue with a similar disc from an infected plant...
January 2017: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28062121/instantaneous-centers-of-rotation-for-lumbar-segmental-extension-in-vivo
#15
Ameet Aiyangar, Liying Zheng, William Anderst, Xudong Zhang
The study aimed to map instantaneous centers of rotation (ICRs) of lumbar motion segments during a functional lifting task and examine differences across segments and variations caused by magnitude of weight lifted. Eleven healthy participants lifted loads of three different magnitudes (4.5, 9, and 13.5kg) from a trunk-flexed (~75°) to an upright position, while being imaged by a dynamic stereo X-ray (DSX) system. Tracked lumbar vertebral (L2-S1) motion data were processed into highly accurate 6DOF intervertebral (L2L3, L3L4, L4L5, L5S1) kinematics...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28061490/comparative-analysis-between-total-disc-replacement-and-posterior-foraminotomy-for-posterolateral-soft-disc-herniation-with-unilateral-radiculopathy-clinical-and-biomechanical-results-of-a-minimum-5-years-follow-up
#16
Kyoung-Tae Kim, Dae-Chul Cho, Joo-Kyung Sung, Young-Baeg Kim, Du Hwan Kim
OBJECTIVE: To compare the clinical outcomes and biomechanical effects of total disc replacement (TDR) and posterior cervical foraminotomy (PCF) and to propose relative inclusion criteria. METHODS: Thirty-five patients who underwent surgery between 2006 and 2008 were included. All patients had single-level disease and only radiculopathy. The overall sagittal balance and angle and height of a functional segmental unit (FSU; upper and lower vertebral body of the operative lesion) were assessed by preoperative and follow-up radiographs...
January 1, 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28042722/m6-c-artificial-disc-placement
#17
Domagoj Coric, John Parish, Margaret O Boltes
There has been a steady evolution of cervical total disc replacement (TDR) devices over the last decade resulting in surgical technique that closely mimics anterior cervical discectomy and fusion as well as disc design that emphasizes quality of motion. The M6-C TDR device is a modern-generation artificial disc composed of titanium endplates with tri-keel fixation as well as a polyethylene weave with a polyurethane core. Although not yet approved by the FDA, M6-C has finished a pilot and pivotal US Investigational Device Exemption (IDE) study...
January 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28042721/surgical-technique-for-revision-surgery-of-cervical-artificial-disc-replacements
#18
Julia Onken, Bernhard Meyer, Peter Vajkoczy
OBJECTIVE Cervical artificial disc replacement (C-ADR) is a widely used procedure with low risk at implantation. Few cases have been reported about the surgical techniques of C-ADR revision. The authors describe their surgical experience with the explantation of a Galileo C-ADR. METHODS Revision surgery was performed in a 58-year-old patient. Patient positioning and surgical opening techniques were performed as appropriate for anterior cervical decompression. RESULTS Revision surgery via the initial anterior approach was successful following an atraumatic removal of the implant...
January 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28032699/an-analysis-of-paravertebral-ossification-in-cervical-artificial-disc-replacement-a-novel-classification-based-on-computed-tomography
#19
Wei Tian, Ming-Xing Fan, Ya-Jun Liu, Xiao Han, Kai Yan, Han Wang, Yan-Wei Lyu
OBJECTIVE: Cervical artificial disc replacement (CADR) is a new technology in cervical spine surgery. However, CADR may result in paravertebral ossification (PO) after surgery and affect the mobility of the related spinal segments. The present widely used assessment method based on X-ray tomography cannot provide the position information of PO, and also PO detection rates by X-ray are low. The incidence of PO varies dramatically between studies. This study built a novel classification system based on cervical computer tomography (CT) scan to re-evaluate the incidence of PO and its influence on CADR, and also analyzed the predisposing factors of PO...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28002693/degree-of-conversion-and-polymerization-shrinkage-of-bulk-fill-resin-based-composites
#20
P Yu, Auj Yap, X Y Wang
This study evaluated the degree of conversion (DC) and polymerization shrinkage (PS) of contemporary bulk-fill resin-based composites (RBCs) including giomer materials. Two giomer bulk-fill (Beautifil Bulk Restorative [BBR], Beautifil Bulk Flowable [BBF]), two nongiomer bulk-fill (Tetric N-Ceram Bulk-fill [TNB], Smart Dentin Replacement [SDR]), and three conventional non-bulk-fill (Beautifil II [BT], Beautifil Flow Plus [BF], Tetric N-Ceram [TN]) RBCs were selected for the study. To evaluate the DC, disc-shaped specimens of 5-mm diameter and 2-mm, 4-mm, and 6-mm thickness were fabricated using customized Teflon molds...
January 2017: Operative Dentistry
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