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https://www.readbyqxmd.com/read/29240113/homogeneous-material-based-calibration-method-for-correcting-laser-induced-breakdown-spectroscopy-measurement-error-bias-in-the-case-of-dust-pollution
#1
Yang Zhao, Lei Zhang, Wangbao Yin, Jiajia Hou, Zhe Wang, Zongyu Hou, Weiguang Ma, Lei Dong, Guangye Yang, Liantuan Xiao, Suotang Jia
A calibration method based on homogeneous material for correcting laser-induced breakdown spectroscopy (LIBS) measurement-error bias in the case of dust pollution under laboratory conditions is proposed. The measured plasma spectra of the sample can be corrected by measuring the spectral integral of the homogeneous material. Thus, we can effectively minimize the dust pollution effect on LIBS and guarantee its precision. Results show that the mean absolute errors of CaO, MgO, Fe2O3, Al2O3, and SiO2 in cement samples are decreased notably from 1...
December 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29238859/-influence-of-thermodisinfection-on-impaction-of-cancellous-bone-an%C3%A2-in-vitro-model-of-femoral-impaction-bone-grafting
#2
REVIEW
C Fölsch, A Jahnke, A Groß, G Martels, G A Krombach, M Rickert, M Kampschulte
BACKGROUND: The reconstruction of bony defects during endoprosthesis revision surgery using "impaction bone grafting" leads to the possibility of a longstanding osseous integration to achieve good clinical results. Native allogeneic cancellous bone is often used for the procedure. This study examines the influence of thermodisinfection on the impaction behaviour of cancellous bone of different geometries and on the cement distribution. METHODS: The cancellous bone was obtained from the femoral heads of 7‑month old pigs...
December 13, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/29238488/effect-of-hydrofluoric-acid-surface-treatments-on-micro-shear-bond-strength-of-cad-cam-ceramics
#3
Faraneh Mokhtarpour, Homayoon Alaghehmand, Soraya Khafri
Introduction: Dental ceramics are appreciated as highly esthetic restorative materials that can simulate the appearance of natural dentition better than other materials. The aim of this study was to evaluate the effect of hydrofluoric acid concentration and etching time on micro-shear bond strength (μSBS) to IPS e.max CAD and Vita Mark II of a dual cured resin cement (Panavia F2.0). Methods: This study was an experimental in vitro study, performed in the dental material research center of Babol University of Medical Sciences in 2016...
October 2017: Electronic Physician
https://www.readbyqxmd.com/read/29237021/human-specific-subcellular-compartmentalization-of-p-element-induced-wimpy-testis-like-piwil-granules-during-germ-cell-development-and-spermatogenesis
#4
Maria Gomes Fernandes, Nannan He, Fang Wang, Liesbeth Van Iperen, Cristina Eguizabal, Roberto Matorras, Bernard A J Roelen, Susana M Chuva De Sousa Lopes
STUDY QUESTION: What is the dynamics of expression of P-element induced wimpy testis-like (PIWIL) proteins in the germline during human fetal development and spermatogenesis? SUMMARY ANSWER: PIWIL1, PIWIL2, PIWIL3 and PIWIL4 were expressed in a sex-specific fashion in human germ cells (GC) during development and adulthood. PIWILs showed a mutually exclusive pattern of subcellular localization. PIWILs were present in the intermitochondrial cement and a single large granule in meiotic GC and their expression was different from that observed in mice, highlighting species-differences...
December 11, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29236900/influence-of-implantoplasty-on-stress-distribution-of-exposed-implants-at-different-bone-insertion-levels
#5
João Paulo Mendes Tribst, Amanda Maria de Oliveira Dal Piva, Jamil Awad Shibli, Alexandre Luiz Souto Borges, Rubens Nisie Tango
This study evaluated the effect of implantoplasty on different bone insertion levels of exposed implants. A model of the Bone Level Tapered implant (Straumann Institute, Waldenburg, Switzerland) was created through the Rhinoceros software (version 5.0 SR8, McNeel North America, Seattle, WA, USA). The abutment was fixed to the implant through a retention screw and a monolithic crown was modeled over a cementation line. Six models were created with increasing portions of the implant threads exposed: C1 (1 mm), C2 (2 mm), C3 (3 mm), C4 (4 mm), C5 (5 mm) and C6 (6 mm)...
December 7, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/29236682/is-it-beneficial-to-reuse-the-balloon-in-percutaneous-kyphoplasty-for-the-treatment-of-non-neoplastic-vertebral-compression-fractures
#6
Zehao Jing, Qi Sun, Jianli Dong, Fanqi Meng, Youzhi Song, Tonglin Xia, Jia Luo, Yanqiang Li, Feng Nan
BACKGROUND Percutaneous kyphoplasty (PKP) has been widely used to treat vertebral compression fractures (VCFs). Bilateral percutaneous punctures are always performed to access the fractured vertebrae. However, the procedure has expensive clinical costs, especially the cost for the device, which creates a heavy financial burden for patients. MATERIAL AND METHODS Data from 49 patients who have single-level non-neoplastic vertebral compression fracture (VCF) were collected for 12 months after treated by PKP, including 21 cases that used bilateral puncture with single balloon (S group) and 28 cases that used bilateral puncture with double balloon (D group)...
December 13, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29235775/screw-retained-versus-cement-retained-restorations-aesthetic-zone-options
#7
Todd R Schoenbaum, Chandur P K Wadhwani
No abstract text is available yet for this article.
January 2017: Dentistry Today
https://www.readbyqxmd.com/read/29235196/influence-of-particle-and-air-abrasion-moment-on-y-tzp-surface-characterization-and-bond-strength
#8
Samira Branco Martins, Filipe de Oliveira Abi-Rached, Gelson Luis Adabo, Paolo Baldissara, Renata Garcia Fonseca
PURPOSE: To evaluate the influence of particle and air-abrasion on the surface characterization and shear bond strength (SBS) of a Y-TZP ceramic with a resin cement. MATERIALS AND METHODS: Y-TZP specimens were air-abraded with 50 μm alumina particles; 120 μm alumina particles; 30 μm silica-coated alumina particles (Rocatec Soft); 110 μm silica-coated alumina particles (Rocatec Plus). Air-abrasion was performed before (BS); after (AS); before and after (BAS) zirconia sintering...
December 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29235022/atmospheric-heavy-metal-deposition-in-agro-ecosystems-in-china
#9
Yanling Zhang, Shixiang Zhang, Fengpeng Zhu, Aiguo Wang, Huaxin Dai, Sen Cheng, Jianwei Wang, Lina Tang
Atmospheric deposition has become one of the main sources of heavy metals in crops in developed and industrial zones in China for the past several years. However, lack of data of the agro-ecosystems on the vast areas of China makes it difficult to assess the impacts of air pollution on the heavy metal accumulation in crops. In this study, with deposit samples from 67 sites located at different agro-ecosystems (typical, factory nearby, town nearby, roadside, and remote) of four natural regions [Huanghuai (HH), Southeast (SE), Southwest (SW) and upper-mid Yangzi River (Up-mid YR)], atmospheric heavy metal deposition in agro-ecosystems on a large scale in China was studied...
December 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29234957/factors-affecting-the-outcomes-of-direct-pulp-capping-using-biodentine
#10
Mariusz Lipski, Alicja Nowicka, Katarzyna Kot, Lidia Postek-Stefańska, Iwona Wysoczańska-Jankowicz, Lech Borkowski, Paweł Andersz, Anna Jarząbek, Katarzyna Grocholewicz, Ewa Sobolewska, Krzysztof Woźniak, Agnieszka Droździk
INTRODUCTION: This study aimed to evaluate the prognostic value of factors with regard to the treatment outcome of direct pulp capping using Biodentine (Septodont, Saint-Maur-des-Fossés, France), in permanent teeth in which the pulps were exposed during caries removal. METHODS: Between 2010 and 2014, 112 teeth with deep carious lesions underwent direct pulp capping. The patients were followed up at 2-3 months and 1-1.5 years with a routine examination on both recall visits...
December 12, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29234746/short-implants-as-an-alternative-to-crestal-sinus-lift-a-3-year-multicentre-randomised-controlled-trial
#11
Giorgio Gastaldi, Pietro Felice, Roberto Pistilli, Carlo Barausse, Anna Trullenque-Eriksson, Marco Esposito
PURPOSE: To evaluate the efficacy of short (5 or 6 mm long) dental implants vs 10 mm or longer implants placed in crestally lifted sinuses. MATERIALS AND METHODS: Twenty partially edentulous patients with 5 to 7 mm of residual crestal height and at least 7 mm thickness below the maxillary sinuses as measured on computed tomography scans were randomised according to a parallel group design to receive either one to two 5 or 6 mm long implants (10 patients) or 10 mm long implants (10 patients) after crestal sinus lifting and grafting with anorganic bovine bone...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29234663/reconstruction-with-iliac-pedestal-cup-and-proximal-femur-tumor-prosthesis-after-wide-resection-of-chondrosarcoma-10-year-follow-up-results
#12
Diogo Lino Moura, Rúben Fonseca, João Freitas, António Figueiredo, José Casanova
Chondrosarcoma is a malignant cartilage-forming neoplasm. It is difficult to treat because of resistance to both chemotherapy and radiation, making wide local excision the only treatment. This report presents an active, 43 year-old man who was diagnosed with recurrent clear cell chondrosarcoma of the proximal left femur, previously reconstructed with a total hip prosthesis, extending to the weight-bearing dome of the acetabulum. Cancer staging study revealed no signs of tumor dissemination at distance. Given the excellent functional status of the patient, the authors performed a Enneking-Dunham type periacetabular pelvic resection and resected en bloc, with the total hip prosthesis including 22 cm of the femur and a portion of the hip abductor apparatus...
November 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29234138/effect-of-high-power-laser-with-and-without-graphite-coating-on-bonding-of-resin-cement-to-lithium-disilicate-ceramic
#13
Fernanda A Feitosa, Rodrigo M de Araújo, Franklin R Tay, Lina Niu, César R Pucci
The present study evaluated the effect of different high-power-laser surface treatments on the bond strength between resin cement and disilicate ceramic. Lithium disilicate ceramic specimens with truncated cones shape were prepared and divided into 5 groups: HF (hydrofluoric acid-etching), Er:YAG laser + HF, Graphite + Er:YAG laser + HF, Nd:YAG laser + HF, and Graphite + Nd:YAG laser + HF. The treated ceramic surfaces were characterized with scanning electron microscopy and surface roughness measurement...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29232186/cemented-or-cementless-total-knee-arthroplasty-comparative-results-of-200-cases-at-a-minimum-follow-up-of-11-years
#14
Jean-Louis Prudhon, Régis Verdier
INTRODUCTION: Since 1996 we have been using cementless fixation with hydroxyapatite (HA) coating. The purpose of this paper is to compare survivorship of a series of 100 cemented Total Knee Arthroplasty (TKA) to a similar series of 100 cementless with a follow up of 11-16 years. Material methods: Both TKA are mobile bearing total knee postero-stabilized. They can be used with cement or without cement. Among 1030 New Wave TKATM implanted from 2002 to 2015 we have identified 100 cemented TKAs and 100 cementless TKAs...
2017: SICOT-J
https://www.readbyqxmd.com/read/29231669/single-unit-cement-retained-implant-restorations-strategies-protocols-and-techniques
#15
Todd Schoenbaum, Richard G Stevenson, Alireza Moshaverinia
No abstract text is available yet for this article.
June 2017: Dentistry Today
https://www.readbyqxmd.com/read/29230489/-potential-of-allogeneic-bone-grafts-as-antibiotic-carriers-effect-of-different-preparation-processes-on-efficacy
#16
REVIEW
D C Coraça-Huber, M Nogler, K-D Kühn
BACKGROUND: The rising number of primary joint replacements worldwide is causing an increase of endoprosthetic revision surgery due bacterial infection. Revision surgery using non-cemented implants seems beneficial for the long-term outcome, and the use of antibiotic-impregnated bone grafts might control the infection and provide a good support for the implant. In this study, we evaluated the release of antibiotics from fresh-frozen and lyophilized allogeneic bone grafts. METHODS: Heat-treated, lyophilized and fresh frozen cryopreserved bone chips were impregnated with gentamicin sulphate, gentamicin palmitate and vancomycin, and calcium carbonate/calcium sulphate treated with antibiotics...
December 11, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/29227564/novel-mold-resistant-building-materials-impregnated-with-thermally-reduced-nano-silver
#17
Yen-Chi Chen, Kuo-Pin Yu, Wen-Cheng Shao, Chao-Heng Tseng, Wen-Chi Pan
In this study, we evaluated the long-term antifungal effectiveness of 3 types of interior building materials (gypsum board (GB), cement board (CB) and softwood plywood (S-PW)) impregnated with thermally reduced silver nanoparticles supported by titanium dioxide (AgNPs/TiO2 ) under 95% relative humidity for four weeks. AgNPs/TiO2 was synthesized at two thermal reduction temperatures (TRTs, 120 and 200°C) with two different AgNP weight percentages (2 and 5 wt%). Four different silver loading levels (SLLs, 0...
December 11, 2017: Indoor Air
https://www.readbyqxmd.com/read/29226608/internal-adaptation-of-resin-composite-restorations-with-different-thicknesses-of-glass-ionomer-cement-lining
#18
Ornjira Chailert, Danuchit Banomyong, Nataya Vongphan, Piyanart Ekworapoj, Michael F Burrow
AIM: The aim of the present study was to investigate the effect of the thin or thick placement of resin-modified glass ionomer cement (RMGIC) lining on the adaptation of resin composite restorations bonded with two types of adhesive. METHODS: Sixty deep occlusal cavities were prepared and divided into two groups: etch-and-rinse adhesive (Single Bond 2) or self-etching adhesive (Clearfil SE Bond). Specimens were further divided into three subgroups: no lining (control), lined with 0...
December 10, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29226553/design-and-properties-of-a-novel-radiopaque-injectable-apatitic-calcium-phosphate-cement-suitable-for-image-guided-implantation
#19
Myriam Le Ferrec, Charlotte Mellier, Florian Boukhechba, Thomas Le Corroller, Daphné Guenoun, Franck Fayon, Valérie Montouillout, Christelle Despas, Alain Walcarius, Dominique Massiot, François-Xavier Lefèvre, Caroline Robic, Jean-Claude Scimeca, Jean-Michel Bouler, Bruno Bujoli
An injectable purely apatitic calcium phosphate cement (CPC) was successfully combined to a water-soluble radiopaque agent (i.e., Xenetix® ), to result in an optimized composition that was found to be as satisfactory as poly(methyl methacrylate) (PMMA) formulations used for vertebroplasty, in terms of radiopacity, texture and injectability. For that purpose, the Xenetix dosage in the cement paste was optimized by injection of the radiopaque CPC in human cadaveric vertebrae under classical PMMA vertebroplasty conditions, performed by interventional radiologists familiar with this surgical procedure...
December 11, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29226342/calcium-chloride-enriched-calcium-aluminate-cement-promotes-in-vitro-osteogenesis
#20
L M S Castro-Raucci, L N Teixeira, A F S Barbosa, R R Fernandes, W Raucci-Neto, M Jacobovitz, I R Oliveira, P T de Oliveira
AIM: To evaluate the effects of 2.8% or 10% calcium chloride (CaCl2 ) in calcium aluminate cement (CAC) with either bismuth oxide (Bi2 O3 ) or zinc oxide (ZnO) as radiopacifiers on the progression of osteogenic cell cultures. METHODOLOGY: Rat calvaria-derived cells were grown on Thermanox® coverslips for 24 h and exposed to samples of 1) CACb: with 2.8% CaCl2 and 25% Bi2 O3 ; 2) CACb+: with 10% CaCl2 and 25% Bi2 O3 ; 3) CACz: with 2.8% CaCl2 and 25% ZnO; or 4) CACz+: with 10% CaCl2 and 25% ZnO, placed on inserts...
December 11, 2017: International Endodontic Journal
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