keyword
MENU ▼
Read by QxMD icon Read
search

Disc replacement

keyword
https://www.readbyqxmd.com/read/28062121/instantaneous-centers-of-rotation-for-lumbar-segmental-extension-in-vivo
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28002363/comparison-of-outcomes-of-single-level-anterior-cervical-discectomy-with-fusion-and-single-level-artificial-cervical-disc-replacement-for-single-level-cervical-degenerative-disc-disease
#7
Praveen Kumar Pandey, Inder Pawar, Jyoti Gupta, Raaghav Rai Verma
STUDY DESIGN: A single-center, prospective comparative study of prospectively collected outcomes, with a minimum 12 months follow-up. OBJECTIVES: The primary purpose of the study is to investigate the clinical, functional, and radiological outcomes of cervical total disc replacement (CTDR) in comparison with anterior cervical discectomy and fusion (ACDF) in the treatment of single-level cervical disc degenerative disease, prospectively. SUMMARY OF BACKGROUND DATA: CTDR has recently been an alternative to ACDF in cervical disc degenerative disease to preserve the motion at the treated level...
January 1, 2017: Spine
https://www.readbyqxmd.com/read/27990418/finite-element-study-of-a-lumbar-intervertebral-disc-nucleus-replacement-device
#8
Jessica S Coogan, W Loren Francis, Travis D Eliason, Todd L Bredbenner, Brian D Stemper, Narayan Yoganandan, Frank A Pintar, Daniel P Nicolella
Nucleus replacement technologies are a minimally invasive alternative to spinal fusion and total disc replacement that have the potential to reduce pain and restore motion for patients with degenerative disc disease. Finite element modeling can be used to determine the biomechanics associated with nucleus replacement technologies. The current study focuses on a new nucleus replacement device designed as a conforming silicone implant with an internal void. A validated finite element model of the human lumbar L3-L4 motion segment was developed and used to investigate the influence of the nucleus replacement device on spine biomechanics...
2016: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/27989698/tumor-suppressor-rybp-harbors-three-nuclear-localization-signals-and-its-cytoplasm-located-mutant-exerts-more-potent-anti-cancer-activities-than-corresponding-wild-type
#9
Kuan Tan, Xuan Zhang, Xiaojie Cong, Bingren Huang, Hong Chen, Deng Chen
Ectopically expressed Ring1 and YY1 binding protein (RYBP) induces tumor cell apoptosis through promoting the formation of the death-inducing signaling complex (DISC) in the cytoplasm. However, transiently overexpressed as well as endogenous RYBP in tumor tissues were observed to be mainly located in the nucleus while that in adjacent non-tumor tissues distributed majorly in the cytoplasm. Currently, we do not know the nuclear localization signals and biological function of different subcellular location of RYBP...
October 27, 2016: Cellular Signalling
https://www.readbyqxmd.com/read/27958664/geometry-landmarks-and-the-cerebral-hemispheres-2d-spatial-reorientation-in-split-brain-patients
#10
Giulia Prete, Mara Fabri, Nicoletta Foschi, Luca Tommasi
A right-hemispheric superiority in spatial encoding based on geometric cues has been largely documented in a variety of species, together with a left-hemispheric specialization for encoding based on landmarks. In humans, hemispheric asymmetries for spatial encoding have been little explored. In this study, we compared a patient with a complete callosal resection (D.D.C.) and a patient with a wide callosal resection saving the splenium (A.P.), with healthy participants. In two 2D versions of the 'reorientation task', participants were asked to find the target corner of a rectangle-shaped environment, by exploiting either geometric information alone or the combination of geometric and landmark information...
December 13, 2016: Journal of Neuropsychology
https://www.readbyqxmd.com/read/27939974/revision-surgeries-following-artificial-disc-replacement-of-cervical-spine
#11
Jong-Beom Park, Han Chang, Jin S Yeom, Kyung-Soo Suk, Dong-Ho Lee, Jae Chul Lee
OBJECTIVE: We investigated causes and results of revision surgeries after artificial disc replacement of cervical spine (C-ADR). METHODS: Twenty-one patients (mean age: 52.8) who underwent revision surgery after C-ADR and who had a minimum 2-year of follow-up were included into this study. The mean time between the primary and revision surgeries was 21 months. During their primary surgeries, 14 patients underwent single level C-ADR, 2 two-level C-ADR, and 5 two-level hybrid surgery for 16 radiculopathy, 3 myelopathy, and 2 adjacent segment diseases...
December 8, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27936042/influence-of-biodentine%C3%A2-a-dentine-substitute-on-collagen-type-i-synthesis-in-pulp-fibroblasts-in-vitro
#12
Frangis Nikfarjam, Kim Beyer, Anke König, Matthias Hofmann, Manuel Butting, Eva Valesky, Stefan Kippenberger, Roland Kaufmann, Detlef Heidemann, August Bernd, Nadja Nicole Zöller
Preserving a patient's own teeth-even in a difficult situation-is nowadays preferable to surgical intervention and therefore promotes development of suitable dental repair materials. Biodentine®, a mineral trioxide aggregate substitute, has been used to replace dentine in a bioactive and biocompatible manner in both the dental crown and the root. The aim of our study was to evaluate the influence of Biodentine® on pulp fibroblasts in vitro. For this study, one to five Biodentine® discs with a diameter of 5...
2016: PloS One
https://www.readbyqxmd.com/read/27930865/surrogate-outcome-measures-of-in-vitro-osteoclast-resorption-of-%C3%AE-tricalcium-phosphate
#13
Susan A Clarke, Joanne Martin, John Nelson, Jean-Christophe Hornez, Marc Bohner, Nicholas Dunne, Fraser Buchanan
Introduction of porosity to calcium phosphate scaffolds for bone repair has created a new challenge when measuring bioresorption in vitro, rendering traditional outcome measures redundant. The aim of this study is to identify a surrogate endpoint for use with 3D scaffolds. Murine RAW 264.7 cells are cultured on dense discs of β-tricalcium phosphate in conditions to stimulate osteoclast (OC) formation. Multinucleated OCs are visible from day 6 with increases at days 8 and 10. Resorption pits are first observed at day 6 with much larger pits visible at days 8, 10, and 12...
December 8, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27906950/clinical-evaluation-and-magnetic-resonance-imaging-assessment-of-intradiscal-methylene-blue-injection-for-the-treatment-of-discogenic-low-back-pain
#14
XiaoJun Zhang, Jie Hao, Zhenming Hu, HaiTao Yang
BACKGROUND: Low back pain is a common worldwide health problem and has a significant socioeconomic impact on public health. Internal disc disruption has been considered as the most common cause of low back pain. Various therapies, including interbody fusion, disc replacement, injection therapies, and thermal annular procedures have been utilized for the treatment of discogenic low back pain. Recently, a new method of intradiscal methylene blue injection has been introduced to treat discogenic low back pain, but the clinical outcomes are controversial...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27902945/artificial-cervical-disc-replacement-with-the-prestige-lp-prosthesis-for-the-treatment-of-non-contiguous-2-level-cervical-degenerative-disc-disease-a-minimum-24-month-follow-up
#15
Tingkui Wu, Beiyu Wang, Chen Ding, Yang Meng, Jigang Lou, Yi Yang, Hao Liu
OBJECTIVE: We describe the features of non-contiguous 2-level cervical degenerative disc disease (NCDDD), investigate the safety and feasibility of artificial cervical disc replacement (ACDR) for the treatment of NCDDD, and expect that our study will provide spine surgeons with an alternative procedure for NCDDD. METHODS: Twenty-five patients with NCDDD received ACDR with a Prestige-LP prosthesis. Clinical outcomes were evaluated using the 36-Short Form (SF-36, Mental Component Summary [MCS] and Physical Component Summary [PCS]), Visual Analog Scale (VAS), Japanese Orthopedic Association (JOA), and Neck Disability Index (NDI) scores...
January 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27893747/analysis-of-the-function-of-apoptosis-during-imaginal-wing-disc-regeneration-in-drosophila-melanogaster
#16
Sandra Diaz-Garcia, Sara Ahmed, Antonio Baonza
Regeneration is the ability that allows organisms to replace missing organs or lost tissue after injuries. This ability requires the coordinated activity of different cellular processes, including programmed cell death. Apoptosis plays a key role as a source of signals necessary for regeneration in different organisms. The imaginal discs of Drosophila melanogaster provide a particularly well-characterised model system for studying the cellular and molecular mechanisms underlying regeneration. Although it has been shown that signals produced by apoptotic cells are needed for homeostasis and regeneration of some tissues of this organism, such as the adult midgut, the contribution of apoptosis to disc regeneration remains unclear...
2016: PloS One
https://www.readbyqxmd.com/read/27890691/minimum-four-year-subsequent-surgery-rates-of-cervical-disc-replacement-versus-fusion-a-meta-analysis-of-prospective-randomized-clinical-trials
#17
T K Wu, H Liu, B Y Wang, Y Meng
INSTRUCTION: Anterior cervical discectomy and fusion (ACDF) is a well-accepted surgical management strategy for radiculopathy and/or myelopathy. However, complications sometimes required subsequent surgery at the operated and adjacent levels. Artificial cervical disc replacement (ACDR) has been accepted as the most extensive non-fusion procedure and is designed to preserve motion. However, some specific complications can result in subsequent surgery, thus, attracting the attention of investigators...
November 24, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27888676/revision-surgery-for-cervical-artificial-disc-surgical-technique-and-clinical-results
#18
J Onken, A Reinke, J Radke, T Finger, S Bayerl, P Vajkoczy, B Meyer
OBJECTIVE: Cervical artificial disc replacement (C-ADR) was developed with the goal of preserving mobility of the cervical segment in patients with degenerative disc disease. So far, little is known about experiences with revision surgery and explantation of C-ADRs. Here, we report our experience with revision the third generation, Galileo-type disc prosthesis from a retrospective study of two institutions. PATIENTS AND METHODS: Between November 2008 and July 2016, 16 patients with prior implantation of C-ADR underwent removal of the Galileo-type disc prosthesis (Signus, Medizintechnik, Germany) due to a call back by industry...
January 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27865820/adjacent-segment-disease-requiring-reoperation-in-cervical-total-disc-arthroplasty-a-literature-review-and-update
#19
REVIEW
Ki-Eun Chang, Martin H Pham, Patrick C Hsieh
OBJECTIVE: To evaluate the difference in rate of reoperation for adjacent segment disease (ASD) between anterior cervical decompression and fusion (ACDF) and total disc replacement (TDR). METHOD: A systematic review of literature was performed using PubMed, clinicaltrials.gov, and various other search engines. Nine studies met the inclusion criteria and were used to report an estimated overall rate of reoperation secondary to ASD for both ACDF and TDR. RESULTS: Forty-six clinical trials were identified after the initial search, and 9 studies met our inclusion criteria...
November 16, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27847073/impingement-of-single-tilting-disc-mitral-prosthesis-during-transcatheter-aortic-valve%C3%A2-replacement
#20
John J Squiers, Katherine R Hebeler, J Michael DiMaio, Patrick Ogbue, Molly Szerlip, William T Brinkman
An 80-year-old woman with a medical history of mitral valve replacement with single-tilting disc prosthesis underwent transcatheter aortic valve replacement (TAVR). The tilting disc was noted to have abnormal motion after re-ballooning of the TAVR valve. Cardiopulmonary bypass was initiated, and the procedure was converted to surgical aortic valve replacement. After removal of the TAVR valve, the tilting disc moved freely. Although TAVR in patients with mitral prostheses is technically feasible, particular caution is necessary, and postdeployment dilation should be avoided...
December 2016: Annals of Thoracic Surgery
keyword
keyword
26208
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"