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https://www.readbyqxmd.com/read/29457444/-effect-of-surface-modification-on-biotribological-properties-of-ultra-high-molecular-weight-polyethylene-artificial-joints
#1
REVIEW
Jie Ding, Yu-Song Pan
Friction and wear of ultra-high molecular weight polyethylene is a major cause of artificial joint failure. According to mechanism of surface modification method, friction reduction and wear-resistance properties of UHMWPE were improve by several kinds of surface modification methods. Meanwhile, this do not damage the internal structure and properties of UHMWPE. In the process, condition is easy to control and operation is simple. However, reaction time of radiation crosslinking method is too long, the material will be oxidized embrittlement; Monomer itself homopolymerization are seriously in the process of surface grafting; The injection layer of ion implantation methods is very thin and easy to be destroyed...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29455422/correction-to-learning-curves-of-two-different-techniques-for-the-intra-articular-injection-of-the-knee-joint-under-fluoroscopic-guidance
#2
Paolo Simoni, Olivier Malaise, Mounia El Hachemi, Angelo Tromba, Grammatina Boitsios
The published version of this article contained a mistake. In Table 1 of the original article, the numbers of successful injections and failed injections were not correct. The correct Table 1 should read as given below.
February 17, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29455094/emodin-attenuates-titanium-particle-induced-osteolysis-and-rankl-mediated-osteoclastogenesis-through-the-suppression-of-ikk-phosphorylation
#3
Juehong Li, Yamin Li, Xiaochun Peng, Bin Li, Xiangwei Yuan, Yunsu Chen
Aseptic loosening due to wear particles is a serious challenge for orthopedic surgeons, sabotaging the long-term success of total joint arthroplasty. The existing treatments for aseptic loosening are still far from satisfactory, necessitating more aggressive drug exploration. Here, we examined the effect of emodin on titanium particle-induced osteolysis and further investigated its underlying mechanism in vivo and in vitro. Thirty-two C57BL/6 mice were randomly assigned into four groups: the Sham group (sham operation with vehicle injection), Vehicle group (titanium particle treatment with vehicle injections), Low group (titanium particle treatment with injections of 10 mg/kg/day emodin) and High group (titanium particle treatment with injections of 50 mg/kg/day emodin)...
February 15, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29453629/-the-application-of-different-injection-methods-for-cervical-and-lumbar-syndromes
#4
F Faber, A Benditz, D Boluki, J Grifka
The differentiated consideration of cervical and lumbar pain syndromes leads to a decoding of complaints to assignable pain generators which enables a targeted injection method. Depending on the origin of pain injections are placed at the nerve root or the joints. Thus, the vicious cycle can be stopped. A correct technical procedure is of enormous importance. Because pharmacological effects and special complications are possible, monitoring and precautions are mandatory.
February 16, 2018: Der Schmerz
https://www.readbyqxmd.com/read/29453488/no-evidence-for-combining-cartilage-treatment-and-knee-osteotomy-in-osteoarthritic-joints-a-systematic-literature-review
#5
REVIEW
G Filardo, S Zaffagnini, R De Filippis, F Perdisa, L Andriolo, C Candrian
PURPOSE: To assess whether the combination of HTO and cartilage treatment produced an additional clinical benefit compared to HTO alone. The secondary aim was to identify if there was any difference among different cartilage procedures in terms of healing potential and clinical outcome. METHODS: A systematic review of the literature was performed on PubMed database by three independent observers according to the following inclusion criteria: clinical reports of any level of evidence, written in the English language, with no time limitation, about HTO associated with cartilage surgical and injective treatment, including surveys reporting clinical, radiological, or second-look outcomes at any follow-up time...
February 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29447948/roles-of-ihh-signaling-in-chondroprogenitor-function-in-postnatal-condylar-cartilage
#6
Naito Kurio, Cheri Saunders, Till E Bechtold, Imad Salhab, Hyun-Duck Nah, Sayantani Sinha, Paul C Billings, Maurizio Pacifici, Eiki Koyama
Condylar articular cartilage in mouse temporomandibular joint develops from progenitor cells near the articulating surface that proliferate, undergo chondrogenesis and mature into hypertrophic chondrocytes. However, it remains unclear how these processes are regulated, particularly postnatally. Here we focused on the apical polymorphic layer rich in progenitors and asked whether the phenotype and fate of the cells require signaling by Indian hedgehog (Ihh) previously studied in developing long bones. In condyles in newborn mice, the apical polymorphic/progenitor cell layer was ~10 cell layer-thick and expressed the articular matrix marker Tenascin-C (Tn-C), and the underlying thick cell layer expressed Tn-C as well as the chondrogenic master regulator Sox9...
February 12, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29447219/optimization-of-prophylaxis-for-hemophilia-a
#7
Robert D Herbert, Carolyn R Broderick, Chris Barnes, Laurent Billot, Albert Zhou, Jane Latimer
BACKGROUND & AIMS: Prophylactic injections of factor VIII reduce the incidence of bleeds and slow the development of joint damage in people with hemophilia. The aim of this study was to identify optimal person-specific prophylaxis regimens for children with hemophilia A. METHODS: Analytic and numerical methods were used to identify prophylaxis regimens which maximize the time for which plasma factor VIII concentrations exceed a threshold, maximize the lowest plasma factor VIII concentrations, and minimize risk of bleeds...
2018: PloS One
https://www.readbyqxmd.com/read/29443754/multiple-extra-articular-synovial-cysts-accompanied-by-rheumatoid-arthritis-in-the-bilateral-elbow-joints-a-case-report
#8
Jingfeng Zhang, Junli Wang, Xiongwei Mao, Zhengang Li
RATIONALE: Synovial cysts are well known in rheumatoid arthritis (RA), and most common in the popliteal fossa. They may produce lots of local symptoms and complaints, which may present initially as an unrelated clinical condition. Few studies have reported multiple extra-articular synovial cysts (MESCs) in the RA patients. Early diagnosis is crucial for patient treatment. PATIENT CONCERNS: A 50-year-old man without any special clinical histories found a soya bean size bump at the left elbow medially, then multiple lumps were found at bilateral elbows and gradually increasing...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29443020/autologous-microfractured-and-purified-adipose-tissue-for-arthroscopic-management-of-osteochondral-lesions-of-the-talus
#9
Riccardo D'Ambrosi, Cristian Indino, Camilla Maccario, Luigi Manzi, Federico Giuseppe Usuelli
In recent years, regenerative techniques have been increasingly studied and used to treat osteochondral lesions of the talus. In particular, several studies have focused their attention on mesenchymal stem cells derived from adipose tissue. Adipose-derived stem cells (ADSCs) exhibit morphological characteristics and properties similar to other mesenchymal cells, and are able to differentiate into several cellular lines. Moreover, these cells are also widely available in the subcutaneous tissue, representing 10 - 30% of the normal body weight, with a concentration of 5,000 cells per gram of tissue...
January 23, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29441754/extraspinal-percutaneous-osteoplasty-for-the-treatment-of-painful-bony-metastasis
#10
Jae Heon Lee, Su Young Kim, Hwoe Gyeong Ok, Tae Kyun Kim, Kyung Hoon Kim
BACKGROUND: Extraspinal percutaneous osteoplasties (POPs) are novel techniques for the treatment of painful bony metastasis, which is often the cause of both persistent and incidental breakthrough pain. This retrospective study explored the efficacy and complications of extraspinal POPs. METHODS: The origin of the cancer metastasis, performed POP sites, necessity of adjacent joint injections, pain and Karnofsky Performance Scale (KPS) scores, complications related to the POPs, and life expectancy were evaluated from the medical records from 2009 to 2016...
February 19, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29440889/a-novel-therapeutic-strategy-for-cartilage-diseases-based-on-lipid-nanoparticle-rnai-delivery-system
#11
Shaowei Wang, Xiaochun Wei, Xiaojuan Sun, Chongwei Chen, Jingming Zhou, Ge Zhang, Heng Wu, Baosheng Guo, Lei Wei
Background: Cartilage degeneration affects millions of people but preventing its degeneration is a big challenge. Although RNA interference (RNAi) has been used in human trials via silencing specific genes, the cartilage RNAi has not been possible to date because the cartilage is an avascular and very dense tissue with very low permeability. Purpose: The objective of this study was to develop and validate a novel lipid nanoparticle (LNP)-siRNA delivery system that can prevent cartilage degeneration by knocking down specific genes...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29439762/the-treatment-of-temporomandibular-joint-dislocation
#12
Ulla Prechel, Peter Ottl, Oliver M Ahlers, Andreas Neff
BACKGROUND: The estimated incidence of temporomandibular joint dislocation in Germany is at least 25/100 000 per year. A correct diagnosis and the initiation of appropriate treatment without delay are essential if permanent damage to the joint is to be avoided. METHODS: This review is based on pertinent publications retrieved by a systematic search in the PubMed, Cochrane, Embase, and ZB Med databases. RESULTS: The initial search yielded 24 650 hits; duplicates were removed and 136 studies were chosen for further analysis...
February 2, 2018: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29437060/degenerative-subtalar-joints-complicated-by-medial-plantar-intraneural-cysts-cutting-the-cystic-articular-branch-prevents-recurrence
#13
P Laumonerie, F Lapègue, N Reina, M Tibbo, M Rongières, M Faruch, P Mansat
AIMS: The pathogenesis of intraneural ganglion cysts is controversial. Recent reports in the literature described medial plantar intraneural ganglion cysts (mIGC) with articular branches to subtalar joints. The aim of the current study was to provide further support for the principles underlying the articular theory, and to explain the successes and failures of treatment of mICGs. PATIENTS AND METHODS: Between 2006 and 2017, five patients with five mICGs were retrospectively reviewed...
February 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29436106/corticosteroid-and-cortisol-serum-levels-following-intra-articular-triamcinolone-acetonide-lumbar-facet-joint-injections
#14
Rozalin R Dickson, Joel M Reid, Wayne T Nicholson, Tim J Lamer, W Michael Hooten
BACKGROUND: Facet joint steroid injections are used to treat chronic low back. However, little is known about the systemic absorption and serum levels of steroids following intra-articular facet joint injections. The primary objective of this preliminary study was to investigate the pharmacokinetics of triamcinolone acetonide following fluoroscopically guided intra-articular lumbar facet joint injections in a cohort of patients with chronic low back pain. A secondary aim was to investigate the effects of triamcinolone on serum cortisol levels following lumbar facet joint injections...
February 12, 2018: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29435623/the-biological-basis-for-concentrated-iliac-crest-aspirate-to-enhance-core-decompression-in-the-treatment-of-osteonecrosis
#15
REVIEW
Stuart B Goodman
Core decompression is a surgical procedure that is capable of salvaging the patient's own natural joint, if the operation is performed in the early stages of osteonecrosis, in which the articular surface has not collapsed. The addition of concentrated cells, aspirated from the iliac crest, to the core tract has been shown to enhance the viability of the femoral head, although large, prospective, randomized, blinded multicentre studies are lacking. The rationale for adding these cells to the core decompression tract is to provide osteoprogenitor and vascular progenitor cells to the area of decompressed dead bone, in order to facilitate tissue regeneration and repair...
February 12, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29434816/effectiveness-of-lentivirus-mediated-rna-interference-targeting-mouse-tumor-necrosis-factor-%C3%AE-in-vitro-and-in-vivo
#16
Jibo Wang, Yingjie Zhao, Miaomiao Xin, Lin Pan, Liqin Wang, Kun Yang
The aim of the present study was to identify the effectiveness of lentivirus-mediated RNA interference (RNAi) targeting mouse tumor necrosis factor-α (TNF-α). RNAi lentivirus was used in vitro to transfect RAW264.7 cells, and the expression of TNF-α, interleukin (IL)-1β and IL-6 mRNAs and TNF-α protein in RAW264.7 cells was measured by reverse transcription quantitative polymerase chain reaction (RT-qPCR) and enzyme-linked immunosorbent assay, respectively. In vivo, mice with collagen-induced arthritis (CIA) were injected intravenously with RNAi lentivirus, and CIA arthritis scores and the serum levels of TNF-α were detected...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29434814/metformin-and-pioglitazone-combination-therapy-ameliorate-polycystic-ovary-syndrome-through-ampk-pi3k-jnk-pathway
#17
Yuanyuan Wu, Pengfen Li, Dan Zhang, Yingpu Sun
Polycystic ovary syndrome (PCOS) is a common gynecological endocrine disorder, which results in health problems such as menstrual disorders, hyperandrogenism and persistent anovulation. Hyperandrogenism and insulin resistance are the basic characteristics of PCOS. To investigate the combined effect of metformin and pioglitazone on POCS and the potential mechanisms, a rat model of PCOS was established by intramuscular injection of estradiol valerate (EV). The effect of metformin and pioglitazone monotherapy or combination therapy in control rats and PCOS rats was evaluated, involving the testosterone level, follicular development and insulin resistance...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29433546/a-unique-role-for-galectin-9-in-angiogenesis-and-inflammatory-arthritis
#18
Martin J O'Brien, Qiang Shu, W Alexander Stinson, Pei-Suen Tsou, Jeffrey H Ruth, Takeo Isozaki, Phillip L Campbell, Ray A Ohara, Alisa E Koch, David A Fox, M Asif Amin
BACKGROUND: Galectin-9 (Gal-9) is a mammalian lectin secreted by endothelial cells that is highly expressed in rheumatoid arthritis synovial tissues and synovial fluid. Roles have been proposed for galectins in the regulation of inflammation and angiogenesis. Therefore, we examined the contribution of Gal-9 to angiogenesis and inflammation in arthritis. METHODS: To determine the role of Gal-9 in angiogenesis, we performed human dermal microvascular endothelial cell (HMVEC) chemotaxis, Matrigel tube formation, and mouse Matrigel plug angiogenesis assays...
February 12, 2018: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29430715/characterization-and-comparison-of-rat-monosodium-iodoacetate-and-medial-meniscal-tear-models-of-osteoarthritic-pain
#19
Jill-Desiree Brederson, Katharine L Chu, Jun Xu, Arthur L Nikkel, Stella Markosyan, Michael F Jarvis, Rebecca Edelmayer, Robert S Bitner, Steve McGaraughty
Osteoarthritis (OA) is a degenerative form of arthritis that can result in loss of joint function and chronic pain. The pathological pain state that develops with OA disease involves plastic changes in the peripheral and central nervous systems, however, the cellular mechanisms underlying OA are not fully understood. We characterized the medial meniscal tear (MMT) surgical model and the intra-articular injection of monosodium iodoacetate (MIA) chemical model of OA in rats. Both models produced histological changes in the knee joint and associated bones consistent with OA pathology...
February 11, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29430055/conservative-management-of-mri-confirmed-knee-osteoarthritis-with-instrument-assisted-soft-tissue-mobilization-joint-manipulation-and-platelet-rich-plasma
#20
Arif Karmali
Objective: To describe the successful conservative management of a patient with chronic degenerative knee pain. Clinical Features: An active 47 year-old female office-worker with intermittent right knee pain inferolateral to the right patella for eight months described difficulty ascending stairs, sitting on a chair for one hour, and squatting. A physical exam led to the diagnosis of a suspected chronic degenerative tear of the posterior horn of the right medial meniscus and chronic right subpatellar chondrosis, in addition to extensive cartilaginous degeneration revealed by an MRI study conducted prior to initial presentation...
December 2017: Journal of the Canadian Chiropractic Association
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