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https://www.readbyqxmd.com/read/29028849/the-effect-of-resin-cement-type-and-thermomechanical-aging-on-the-retentive-strength-of-custom-zirconia-abutments-bonded-to-titanium-inserts
#1
Merve Bankoğlu Gu Ngör
PURPOSE: The purpose of this study was to investigate the effect of resin cement type on the retentive strength of custom zirconia abutments bonded to titanium inserts. MATERIALS AND METHODS: Sixty implant (4.3 mm diameter and 11.5 mm length) and custom zirconia abutment (15 mm height and 2 mm wall thickness) pairs were used to form six groups (n = 10 each). Three different resin cements were used to bond the zirconia abutments and titanium inserts: Panavia F 2...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29027926/nanocomposites-for-machining-tools
#2
REVIEW
Daria Sidorenko, Pavel Loginov, Leon Mishnaevsky, Evgeny Levashov
Machining tools are used in many areas of production. To a considerable extent, the performance characteristics of the tools determine the quality and cost of obtained products. The main materials used for producing machining tools are steel, cemented carbides, ceramics and superhard materials. A promising way to improve the performance characteristics of these materials is to design new nanocomposites based on them. The application of micromechanical modeling during the elaboration of composite materials for machining tools can reduce the financial and time costs for development of new tools, with enhanced performance...
October 13, 2017: Materials
https://www.readbyqxmd.com/read/29026135/interventions-for-treating-displaced-intracapsular-femoral-neck-fractures-in-the-elderly-a-bayesian-network-meta-analysis-of-randomized-controlled-trials
#3
Bin-Fei Zhang, Peng-Fei Wang, Hai Huang, Yu-Xuan Cong, Hu Wang, Yan Zhuang
Displaced intracapsular femoral neck (AO type 31 B2/3) fractures have various treatments, including internal fixation (IF), unipolar uncemented hemiarthroplasty (HA), bipolar uncemented HA, unipolar cemented HA, bipolar cemented HA, uncemented total hip replacement (THR), and cemented THR. Systematic literature retrieval was performed from the databases to compare them in a network meta-analysis. Forty studies (85 arms) containing 6141 patients were included. Overall, our network meta-analysis rank the orders of 7 procedures in reoperation, mortality, dislocation and infection, which indicates that IF may provide the highest reoperation incidence, unipolar cemented HA may provide the lowest reoperation incidence; uncemented THR contributes the highest dislocation incidence; and bipolar uncemented HA provides the lowest infection incidence...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29025611/carbon-fiber-reinforced-intramedullary-nailing-in-musculoskeletal-tumor-surgery-a-national-multicentric-experience-of-the-italian-orthopaedic-society-siot-bone-metastasis-study-group
#4
Andrea Piccioli, Raimondo Piana, Michele Lisanti, Alberto Di Martino, Barbara Rossi, Francesco Camnasio, Marco Gatti, Pietro Maniscalco, Franco Gherlinzoni, Maria Silvia Spinelli, Davide Maria Donati, Roberto Biagini, Rodolfo Capanna, Vincenzo Denaro
INTRODUCTION: Carbon fiber reinforced (CFR) implants have been proposed for the treatment of fractures or impending fractures of the long bones in the oncology patient. Aim of this study is to present the largest cohort of oncology patients operated by CFR nailing by the Italian Orthopaedic Society (SIOT) Bone Metastasis Study Group. METHODS: 53 adult oncology patients were operated on with a CFR-PEEK nail. All the data from adjuvants therapies were collected. Bone callus formation, response to radiotherapy, relapse or progression of the osteolysis were recorded...
October 2017: Injury
https://www.readbyqxmd.com/read/29024120/remodeling-and-modeling-based-bone-formation-with-teriparatide-versus-denosumab-a-longitudinal-analysis-from-baseline-to-3-months-in-the-ava-study
#5
David W Dempster, Hua Zhou, Robert R Recker, Jacques P Brown, Christopher P Recknor, E Michael Lewiecki, Paul D Miller, Sudhaker D Rao, David L Kendler, Robert Lindsay, John H Krege, Jahangir Alam, Kathleen A Taylor, Thomas E Melby, Valerie A Ruff
There has been renewed interest of late in the role of modeling-based formation (MBF) during osteoporosis therapy. Here we describe early effects of an established anabolic (teriparatide) versus antiresorptive (denosumab) agent on remodeling-based formation (RBF), MBF, and overflow MBF (oMBF) in human transiliac bone biopsies. Postmenopausal women with osteoporosis received subcutaneous teriparatide (n = 33, 20 µg/day) or denosumab (n = 36, 60 mg once/6 months), open-label for 6 months at 7 US and Canadian sites...
October 12, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29023292/silicone-facial-prosthesis-a-preliminary-report-on-silicone-adhesion-to-magnet
#6
Soung Min Kim, Yun Ju Cho, Mi Young Eo, Jong Sic Kim, Suk Keun Lee
Although a silicone facial prosthesis has many advantages, silicone's limited cementation with resin or metal has caused many maxillofacial reconstructive surgeons and prosthodontists concern regarding the use of silicone-based facial prostheses. This study demonstrates 1 representative silicone facial prosthesis patient with magnet cementation to silicone using plastic clay, which will be applied to various maxillofacial prosthesis strategies in the near future.
October 11, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29022974/the-mechanism-of-cesium-ions-immobilization-in-the-nanometer-channel-of-calcium-silicate-hydrate-a-molecular-dynamics-study
#7
Jinyang Jiang, Pan Wang, Dongshuai Hou
The cement-based matrices are preferred candidates in disposing nuclear waste due to the immobilization role of the calcium-silicate-hydrate (C-S-H) gel. To better understand the immobilization mechanism of cementitious materials, molecular dynamics was utilized to investigate the intensity distribution, local structure and dynamics properties of Cs(+) ions in the vicinity of the calcium silicate surface. The strong inner-sphere adsorbed cesium ions were restricted by coordinated oxygen atoms in bridging and pair silicate tetrahedron and water molecules were fixed in the silicate channel by H-bonds network...
October 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29022206/effect-of-an-alkaline-environment-on-the-engineering-behavior-of-cement-stabilized-solidified-zn-contaminated-soils
#8
Jingjing Liu, Fusheng Zha, Yongfeng Deng, Kerui Cui, Xueqin Zhang
Although the stabilization/solidification method has been widely used for remediation of heavy metal-contaminated soils in recent decades, the engineering behavior and mobility of heavy metal ions under alkaline groundwater conditions are still unclear. Therefore, the unconfined compressive strength test (UCS) combined with toxicity characteristic leaching procedure (TCLP) and general acid neutralization capacity (GANC) was used to investigate the effects of alkalinity (using NaOH to simulate alkalinity in the environment) on the mechanical and leaching characteristics of cement-solidified/stabilized (S/S) Zn-contaminated soils...
October 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29022137/effect-of-different-endodontic-sealers-and-time-of-cementation-on-push-out-bond-strength-of-fiber-posts
#9
Danielle Araújo Vilas-Boas, Renata Grazziotin-Soares, Diego Machado Ardenghi, José Bauer, Patrícia Oliveira de Souza, George Táccio de Miranda Candeiro, Etevaldo Matos Maia-Filho, Ceci Nunes Carvalho
OBJECTIVES: This study aims to evaluate the effect of different endodontic sealers (epoxy resin, eugenol, and bioceramic/calcium silicate-based) and the time of cementation (immediately or 7 days after canal obturation) on the bond strength of a fiberglass post cemented with RelyX™ ARC. MATERIAL AND METHODS: Eighty-four premolars were instrumented and divided into groups (n = 12) according to the sealer and the time of post cementation: Endofill (EN), Endosequence BC Sealer (BC), and AH Plus (AH) had immediately fiber post cementation; EN7, BC7, and AH7 had post cementation after 7 days; and control group (C) had fiber post cementation without endodontic sealer...
October 11, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29021886/antibiotic-laden-arthroplasty-with-a-novel-design-of-cement-mould-and-metallic-endoskeleton-for-treatment-of-hip-infection-an-inexpensive-alternative-a-preliminary-report-of-two-cases
#10
Cch William, S Simmrat, A M Suhaeb
Infection of the hip after implant fixation is an uncommon yet devastating complication that results in poor long-term outcome. The gold standard treatment for chronic infection after hip arthroplasty is a two-stage protocol: eradication of infection, follow by re-implantation arthroplasty. The use of interim antibiotic-laden cement spacer has become a popular procedure to maintain hip joint function and provide antibiotic elution simultaneously before re-implantation. However, antibiotic cement spacer is mechanically weak and breaks if overloaded...
July 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/29020705/mechanical-strength-of-the-proximal-tibia-following-total-knee-arthroplasty-a-cadaveric-study-of-resection-depth-and-bone-density
#11
Tatsuya Sueyoshi, Scott R Small, Jeffrey B Elliott, Grace E Gibbs, Ryan B Seale, Merrill A Ritter
BACKGROUND: Tibial component failure has been a problem in total knee arthroplasty, it is still undetermined how tibial resection depth affects the strength to support a tibial component. This study examined the relationship between the resection depth and the bone density and the mechanical strength to support the tibial component. MATERIALS AND METHODS: Eight matched pairs of fresh, frozen cadaver lower legs were imaged with computed tomography to assess the bone density...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29020561/saving-life-limb-and-eyesight-assessing-the-medical-rules-of-eligibility-during-armed-conflict
#12
Michael L Gross
Medical rules of eligibility permit severely injured Iraqi and Afghan nationals to receive care in Coalition medical facilities only if bed space is available and their injuries result directly from Coalition fire. The first rule favors Coalition soldiers over host-nation nationals and contradicts the principle of impartial, needs-based medical care. To justify preferential care for compatriots, wartime medicine invokes associative obligations of care that favor friends, family, and comrades-in-arms. Associative obligations have little place in peacetime medical care but significantly affect wartime medicine...
October 2017: American Journal of Bioethics: AJOB
https://www.readbyqxmd.com/read/29017759/differential-cytotoxic-effects-on-odontoblastic-cells-induced-by-self-adhesive-resin-cements-as-a-function-of-the-activation-protocol
#13
Paulo Henrique Perlatti D'Alpino, Gioconda Emanuella Diniz de Dantas Moura, Silvana Coelho de Arruda Barbosa, Lygia de Azevedo Marques, Marcos Nogueira Eberlin, Fábio Dupart Nascimento, Ivarne Luis Dos Santos Tersariol
OBJECTIVES: To evaluate the cytotoxic effects of exposing odontoblast cells to a variety of commercial self-adhesive cements polymerized using different activation modes. METHODS: Five cements: MaxCem Elite (MAX), Bifix SE (BSE), G-Cem LinkAce (GCE), Clearfil SA Luting (CAS), and RelyX U200 (U200) were mixed, dispensed into molds, and distributed in groups, according to polymerization protocols: immediate photoactivation; delayed photoactivation (10min self-curing plus light-activation); and chemical activation (no light exposure)...
October 7, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29017495/treatment-of-thoracic-or-lumbar-burst-fractures-with-balloon-assisted-endplate-reduction-using-tricalcium-phosphate-cement-histological-and-radiological-evaluation
#14
Joep Kitzen, Martijn G M Schotanus, Herbert S W Plasschaert, Frans-Jan H Hulsmans, Pieter B J Tilman
BACKGROUND: Short-segment pedicle-screw instrumentation is frequently used to stabilize thoracolumbar burst fractures. A recognized disadvantage of this procedure is recurrent kyphosis from intervertebral disc creep into the fractured central endplate. Balloon Assisted Endplate Reduction (BAER) using Tricalcium Phosphate bone cement (TCP) enables elevation of the centrally depressed endplate. Our objective was to evaluate the bone-tissue response to TCP and to analyse whether BAER using TCP can prevent recurrent kyphosis after removal of the instrumentation...
October 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29016356/decline-in-lung-function-among-cement-production-workers-a-meta-analysis
#15
REVIEW
Somayeh Rahimi Moghadam, Siavosh Abedi, Mahdi Afshari, Ehsan Abedini, Mahmood Moosazadeh
BACKGROUND: Several studies with different results have been performed regarding cement dust exposure and its pathogenic outcomes during the previous years. This study aims to combine these results to obtain a reliable estimate of the effect of exposure to cement dust. METHODS: PubMed and other data banks were searched to identify required electronic articles. The search was extended interviewing with relevant experts and research centers. Point and pooled estimates of outcome with 95% confidence intervals were estimated...
October 10, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28993040/severe-pulmonary-cement-embolism
#16
Ya-Fang Wu, Chih-Cheng Lai, Chien-Ming Chao
No abstract text is available yet for this article.
October 6, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28990203/drug-induced-immune-hemolytic-anemia-associated-with-anti-vancomycin-complicated-by-a-paraben-antibody
#17
Thomas J Gniadek, Patricia A Arndt, Regina M Leger, Daniel Zydowicz, Edward Y Cheng, Nicole D Zantek
BACKGROUND: Drug-induced immune hemolytic anemia (DIIHA) is rare, but potentially life-threatening. A high index of clinical suspicion is required for diagnosis, since the number of medications known to induce DIIHA continues to expand. Additionally, in vitro antibody reactivity against reagent additives has been reported, which may complicate test interpretation. CASE REPORT: A 61-year-old group A, D+ woman with a history of negative antibody detection tests developed hemolytic anemia on Postoperative Day 7 after repeat incision and drainage of a chronically infected right knee prosthesis...
October 8, 2017: Transfusion
https://www.readbyqxmd.com/read/28989132/post-insertion-posterior-single-implant-occlusion-changes-at-different-intervals-a-t-scan-computerized-occlusal-analysis
#18
Azam S Madani, Mohammadreza Nakhaei, Malihe Alami, Hamidreza Rajati Haghi, Saied Mostafa Moazzami
AIM: The aim of this prospective cohort study was to evaluate the postinsertion posterior single-implant occlusion changes at 3- and 6-month intervals using T-Scan computerized occlusal analysis. MATERIALS AND METHODS: A total of 21 patients received single implant, opposed by natural dentition, in posterior regions of the maxilla or mandible (13 premolar, 8 molar) and were finally restored with cemented-retained metal-ceramic crowns. The occlusal contacts were equilibrated according to the implant-protective occlusion concept to develop light contact with heavy occlusion and no contact with light occlusion in maximum inter-cuspation...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28989131/comparison-of-hypersensitivity-in-metal-ceramic-crowns-cemented-with-zinc-phosphate-and-self-adhesive-resin-a-prospective-study
#19
Thatapudi Shankar, Mirna Garhnayak, Lokanath Garhnayak, Angurbala Dhal, Aswini K Kar
BACKGROUND: Luting agents used to fix artificial prostheses, such as fixed partial denture (FPD) to tooth are basically viscous in nature and show chemical reaction for fixation. Postcementation hypersensitivity is a frequent complaint of patients. The present study was conducted to compare postcementation hypersensitivity with zinc phosphate and self-adhesive resin in complete coverage crown. MATERIALS AND METHODS: This study included 30 patients in which 60 porcelein fused to metal crowns was placed...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28989124/comparison-of-shear-bond-strengths-of-conventional-resin-cement-and-self-adhesive-resin-cement-bonded-to-lithium-disilicate-an-in-vitro-study
#20
Anip K Roy, Dennis Mohan, M Sunith, Rashmi B Mandokar, S Suprasidh, Soumya Rajan
AIM: The aim of this study is to compare the shear bond strengths of conventional resin cement and self-adhesive resin cement bonded to lithium disilicate. MATERIALS AND METHODS: A total of 40 extracted human molar teeth were mounted in self-cure acrylic resin. Teeth were prepared to obtain flat occlusal surface. About 40 lithium disilicate specimens of dimension-10 mm in diameter and thickness of 2 mm-were fabricated using lost wax technique. The samples were divided into four groups: Groups I, II, III, and IV (n = 10)...
October 1, 2017: Journal of Contemporary Dental Practice
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