keyword
MENU ▼
Read by QxMD icon Read
search

Artificial disc

keyword
https://www.readbyqxmd.com/read/29457442/-development-and-application-of-artificial-vertebral-body
#1
REVIEW
Jian-Tao Liu, Feng Zhang, Zheng-Chao Gao, Bin-Bin Niu, Yu-Huan Li, Xi-Jing He
Artificial vertebral body has achieved good results in treating spinal tumors, tuberculosis, fracture and other diseases. Currently, artificial vertebral body with variety of kinds and pros and cons, is generally divided into two types: fusion type and movable type. The former according to whether the height could be adjusted and strength of self-stability is divided into three types: support-fixed type, adjust-fixed type and self-fixed type. Whether the height of self-fixed type could be adjusted is dependent on structure of collar thread rotation...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29456709/anterior-spinal-instrumentation-combining-a-prosthetic-disc-nucleus-with-a-flexible-stabilization-device-manufacture-and-use-in-intervertebral-disc-repair
#2
Da Bao, Dawei Li
Artificial disc replacement alone is unable to completely cure cervical degenerative diseases; thus, a stabilization device markedly improves patient recovery. In order to meet this requirement, an anterior spinal instrumentation combining a prosthetic disc nucleus with a flexible stabilization device (ASI combining PDN/FD) was developed. An artificial disc was designed and manufactured using polyvinyl alcohol hydrogel (PVA-H) with a repeated freeze-melting technique, and subsequently the dehydration and swelling properties of the PVA-H were investigated...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29408574/clinical-and-radiological-features-of-three-reconstructive-procedures-for-the-surgical-management-of-patients-with-bi-level-cervical-degenerative-disc-disease-at-a-minimum-follow-up-period-of-five-years-a-comparative-study
#3
Kai-Feng Wang, Shuo Duan, Zhen-Qi Zhu, Hai-Ying Liu, Chen-Jun Liu, Shuai Xu
OBJECTIVE: To assess the mid-long-term follow-up of the safety and efficacy of anterior cervical discectomy and fusion (ACDF), cervical artificial disc replacement (CADR) and hybrid surgery (HS) for bi-level cervical degenerative disc disease (cDDD). METHODS: 77 patients who underwent ACDF, HS and CADR were retrospectively reviewed. Clinical effects were evaluated based on NDI, VAS and JOA scores, and the Odom criteria. Radiographic outcomes were evaluated, including cervical range of motion(ROM), operative and adjacent segments ROM, incidence of adjacent segments degeneration(ASD) and heterotopic ossification(HO)...
January 30, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29398208/histo-morphologic-characteristics-of-intra-osseous-implants-of-we43-mg-alloys-with-and-without-heat-treatment-in-an-in%C3%A2-vivo-cranial-bone-sheep-model
#4
Andrea Torroni, Chongchen Xiang, Lukasz Witek, Eduardo D Rodriguez, Roberto L Flores, Nikhil Gupta, Paulo G Coelho
WE43 Mg alloy, composed of Mg, Yttrium, Rare Earth elements, and Zirconium, has proved to be a suitable candidate for production of resorbable osteosynthesis implants in both clinical and experimental settings. In a previous study we tested biocompatibility and degradation properties of untreated (as-cast) and artificially aged (T-5) WE43 Mg-alloys as subperiosteal implants on a maxillofacial sheep model. Both the alloy compositions showed excellent biocompatibility, however, with respect to degradation rate, the as-cast form showed increased degradability compared with the T-5...
January 4, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29394530/breeding-system-and-bumblebee-drone-pollination-of-an-explosive-pollen-releasing-plant-meliosma-tenuis-sabiaceae
#5
Akira A Wong Sato, Makoto Kato
Explosive pollen release is a mechanism by some angiosperms that serves to attach pollen to a pollinator's body. It is usually adopted by species with zygomorphic tubular flowers and pollinated by birds and bees. The tree genus Meliosma (Sabiaceae, Proteales) has unique disc-like flowers that are externally actinomorphic, but internally zygomorphic, and release pollen explosively. To elucidate the adaptive significance of explosive pollen release, we observed flowering behavior, the breeding system, and pollinator visits to flowers of the Japanese species Meliosma tenuis in a temperate forest...
February 2, 2018: Plant Biology
https://www.readbyqxmd.com/read/29393833/myelopathy-after-cervical-disc-arthroplasty-due-to-progression-of-spondylosis-at-the-index-level-case-report
#6
Anita Bhansali, Michael Musacchio, Noam Stadlan
Cervical disc arthroplasty (CDA) has emerged as a popular alternative to anterior cervical discectomy and fusion (ACDF) for the surgical treatment of cervical degenerative disc disease. CDA has been well studied, with efficacy reported to be equivalent to or better than that seen with ACDF, and it is associated with a consistently low incidence of adverse events. The development or progression of myelopathy after CDA is a particularly rare occurrence. In this report, the authors describe the first known case of recurrence of myelopathy at the index level of surgery after CDA implantation due the continuation of the spondylitic process after placement of the artificial disc...
February 2, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29390319/the-influence-of-artificial-nucleus-pulposus-replacement-on-stress-distribution-in-the-cartilaginous-endplate-in-a-3-dimensional-finite-element-model-of-the-lumbar-intervertebral-disc
#7
Yu Wang, Xiao-Dong Yi, Chun-De Li
OBJECTIVE: This study aimed to investigate the effects involved with the artificial nucleus pulposus (NP) replacement on stress distribution of the cartilaginous endplate (CEP) in a 3-dimensional lumbar intervertebral disc (IVD) model using a finite element (FE) analysis. METHODS: A healthy male volunteer was recruited for the purposes of the study and a spiral computed tomography scan was subsequently conducted to obtain the data information in relation to the L4/5 motion segment...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29390151/high-co2-hypoxia-responsive-transcription-factor-network-involved-in-persimmon-fruit-deastringency
#8
Qing-Gang Zhu, Zi-Yuan Gong, Miao-Miao Wang, Xian Li, Donald Grierson, Xue-Ren Yin, Kun-Song Chen
Plant responses to anaerobic environments are regulated by ethylene response factors (ERFs) in both vegetative and productive organs, but the roles of other transcription factors (TFs) in hypoxia responses are poorly understood. Here, eight TFs (DkbHLH1, DkMYB9/10/11, DkRH2-1, DkGT3-1, DkAN1-1, DkHSF1) were shown to be strongly up-regulated by AHCA (artificial high CO2 atmosphere, 1 % O2 and 95 % CO2). Dual-luciferase assay indicated some TFs were activators of previously characterized DkERFs, including DkMYB10 for the DkERF9 promoter, DkERF18/19 and DkMYB6 for the DkERF19 promoter, DkERF21/22 for the DkERF10 promoter...
January 30, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29382028/intraoperative-conversion-of-artificial-cervical-disc-replacement-to-anterior-cervical-discectomy-and-fusion-for-iatrogenic-fracture-a-rare-case-report
#9
Bei-Yu Wang, Ting-Kui Wu, Hao Liu, Yu-Xiao Deng, Chen Ding
RATIONALE: Artificial cervical disc replacement (ACDR) has been reported to be an effective and safe surgical treatment for cervical spondylosis. However, iatrogenic fracture during ACDR surgery has rarely been reported. Considering its infrequency, we report a rare clinical case, with the aim of sharing our experience and exploring when to convert ACDR to fusion intraoperatively. PATIENTS CONCERNS: A 47-year-old woman felt neck pain with weakness and numbness in both upper limbs for 5 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29369059/use-of-an-ultrasonic-bone-curet-for-the-extraction-of-a-cervical-artificial-disc-a-novel-application-a-case-report
#10
J Timothy, V Petralia, J R Wilson
CASE: Eighteen months after implantation of a C6-C7 cervical artificial disc (ProDisc-C; DePuy Synthes), a 44-year-old woman presented with right-sided C7 radiculopathy. Imaging revealed posterior subsidence of the prosthesis, with C7 foraminal stenosis. An ultrasonic curet was used to safely and effectively extract the prosthesis without neurologic complication; safe access for the insertion of an intervertebral cage was facilitated. CONCLUSION: The ultrasonic curet was a safe and effective adjunct for revision artificial cervical disc replacement surgery; this technique may help to reduce potential injury to neural structures in a procedure with a traditionally high complication rate...
January 24, 2018: JBJS Case Connector
https://www.readbyqxmd.com/read/29354749/focal-hypermobility-observed-in-cervical-arthroplasty-with-mobi-c
#11
Jack William Kerferd, David Abi-Hanna, Kevin Phan, Prashanth Rao, Ralph J Mobbs
In recent decades cervical arthroplasty, or cervical disc replacement, has been steadily increasing in popularity as a procedure for the treatment of degenerative pathologies of the cervical spine. This is based on an evolving body of literature that documents superior outcomes in cervical disc replacement over fusion, for both single and double level pathologies, in well selected patients. One of the more recent and popular implants currently on the market is the Mobi-C cervical artificial disc (LDR Medical; Troyes, France)...
December 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29333707/impact-of-gastric-acid-induced-surface-changes-on-mechanical-behavior-and-optical-characteristics-of-dental-ceramics
#12
Aditi Kulkarni, James Rothrock, Jeffery Thompson
PURPOSE: To test the impact of exposure to artificial gastric acid combined with toothbrush abrasion on the properties of dental ceramics. Earlier research has indicated that immersion in artificial gastric acid has caused increased surface roughness of dental ceramics; however, the combined effects of acid immersion and toothbrush abrasion and the impact of increased surface roughness on mechanical strength and optical properties have not been studied. MATERIALS AND METHODS: Three commercially available ceramics were chosen for this study: feldspathic porcelain, lithium disilicate glass-ceramic, and monolithic zirconium oxide...
January 14, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29328088/determination-of-the-optimum-double-pass-image-through-focus-operators
#13
Anibal G de Paul, Roberto F Sanchez, Luis A Issolio
A set of autofocus operators (AFO) are assessed for their ability to determine the optimal double-pass image as well as their potential to detect the focus lines and the disc of least confusion in astigmatic eyes. Eight AFO and three optical quality parameters (OQP) often used to analyze double-pass aerial images were considered. To quantify the discriminative power of each AFO and OQP, a maximum discrimination (MD) parameter was proposed. Double-pass images were obtained from an artificial eye with an induced astigmatism (Cylinder: -1  D, -0...
January 1, 2018: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29315119/cervical-artificial-disc-replacement-with-discover-prosthesis-does-not-reduce-the-midterm-risk-of-heterotopic-ossification-results-of-a-cohort-study
#14
Jinhao Miao, Ye Shen, Chao Li, Lei Fang, Lei Zhang, Xiangyi Zhang, Yiman Li, Yong Kuang
STUDY DESIGN: A prospective cohort study with 79 patients. OBJECTIVE: To analyze the midterm incidence of heterotopic ossification (HO) after cervical artificial disc replacement with Discover prosthesis in treatment of cervical degenerative disc disease. MATERIALS AND METHODS: A cohort of 79 patients with 102 Discover prostheses (56 monosegment and 23 bisegments) was evaluated. Clinical and radiographic follow-up was performed. The performance of HO of the operative segments was assessed annually after the operation for 4 years...
January 8, 2018: Clinical Spine Surgery
https://www.readbyqxmd.com/read/29303467/prospective-randomized-multicenter-study-of-cervical-arthroplasty-versus-anterior-cervical-discectomy-and-fusion-5-year-results-with-a-metal-on-metal-artificial-disc
#15
Domagoj Coric, Richard D Guyer, Pierce D Nunley, David Musante, Cameron Carmody, Charles Gordon, Carl Lauryssen, Margaret O Boltes, Donna D Ohnmeiss
OBJECTIVE Seven cervical total disc replacement (TDR) devices have received FDA approval since 2006. These devices represent a heterogeneous assortment of implants made from various biomaterials with different biomechanical properties. The majority of these devices are composed of metallic endplates with a polymer core. In this prospective, randomized multicenter study, the authors evaluate the safety and efficacy of a metal-on-metal (MoM) TDR (Kineflex|C) versus anterior cervical discectomy and fusion (ACDF) in the treatment of single-level spondylosis with radiculopathy through a long-term (5-year) follow-up...
January 5, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29291436/superhydrophilic-co-polymer-coatings-on-denture-surfaces-reduce-candida-albicans-adhesion-an-in-vitro-study
#16
Masahiro Hirasawa, Chiaki Tsutsumi-Arai, Kensuke Takakusaki, Toyohisa Oya, Kenji Fueki, Noriyuki Wakabayashi
OBJECTIVE: In this study, we aimed to investigate denture-base-resin coatings prepared with a crosslinkable co-polymer containing sulfobetaine methacrylamide (SBMAm) and the relationship between their surface characteristics and the initial adhesion of Candida albicans (C. albicans). METHODS: Acrylic resin discs were coated with co-polymers containing various concentrations of SBMAm and N,N'-(4,7,10-trioxa-1,13-tridecadiamine) diacrylamide (JDA) as crosslinking agent...
December 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29285031/efficacy-of-modified-bioactive-glass-for-dentin-remineralization-and-obstruction-of-dentinal-tubules
#17
Mahshid Saffarpour, Maryam Mohammadi, Mohammadreza Tahriri, Azadeh Zakerzadeh
Objectives: This study assessed the efficacy of modified bioactive glass (MBG) for dentin remineralization and obstruction of dentinal tubules. Materials and Methods: Thirty-six dentin discs were made from 20 third molars and were stored in 12% lactic acid solution for two weeks to induce demineralization. The samples were divided into three groups (n=12): 1- BG, 2- BG modified with 5% strontium (Sr) and 3- BG modified with 10% Sr. After applying the BG, the samples were stored in artificial saliva for 7, 14 and 21 days...
July 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29245217/efficacy-and-safety-of-mobi-c-cervical-artificial-disc-versus-anterior-discectomy-and-fusion-in-patients-with-symptomatic-degenerative-disc-disease-a-meta-analysis
#18
Hui Lu, Lihua Peng
BACKGROUND: Total disc replacement (TDR) using Mobi-C cervical artificial disc might be promising to treat symptomatic degenerative disc disease. However, the results remained controversial. We conducted a systematic review and meta-analysis to compare the efficacy and safety of Mobi-C cervical artificial disc and anterior cervical discectomy and fusion (ACDF) in patients with symptomatic degenerative disc disease. METHODS: PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases were systematically searched...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29215782/the-effect-of-urinary-foley-catheter-substrate-material-on-the-antimicrobial-potential-of-calixerene-based-molecules
#19
A Guildford, C Morris, O Kitt, I Cooper
AIMS: This study was to investigate the antimicrobial activity of a modified calixarene polymer bound to a silicone substrate in the presence of pathogens associated with catheter infections, Escherichia coli and Proteus mirabilis. METHODS AND RESULTS: The molecule and its constituent parts, were studied bound and unbound to silicone substrates to ascertain growth effects. Minimum inhibitory and bactericidal concentrations were determined against E.coli and Pr.mirabilis...
December 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29192178/characterisation-of-porous-knitted-titanium-for-replacement-of-intervertebral-disc-nucleus-pulposus
#20
Gauri Tendulkar, Vrinda Sreekumar, Frank Rupp, Arun K Teotia, Kiriaki Athanasopulu, Ralf Kemkemer, Alfred Buck, Alfred Buck, Hans-Peter Kaps, Jürgen Geis-Gerstorfer, Ashok Kumar, Andreas K Nussler
Effective restoration of human intervertebral disc degeneration is challenged by numerous limitations of the currently available spinal fusion and arthroplasty treatment strategies. Consequently, use of artificial biomaterial implant is gaining attention as a potential therapeutic strategy. Our study is aimed at investigating and characterizing a novel knitted titanium (Ti6Al4V) implant for the replacement of nucleus pulposus to treat early stages of chronic intervertebral disc degeneration. Specific knitted geometry of the scaffold with a porosity of 67...
November 30, 2017: Scientific Reports
keyword
keyword
23799
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"