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https://www.readbyqxmd.com/read/28819219/the-fabrication-of-an-ica-sf-plcl-nanofibrous-membrane-by-coaxial-electrospinning-and-its-effect-on-bone-regeneration-in-vitro-and-in-vivo
#1
Lihua Yin, Kaijuan Wang, Xiaoqin Lv, Rui Sun, Shaohua Yang, Yujie Yang, Yanyun Liu, Jiatao Liu, Jing Zhou, Zhanhai Yu
GBR is currently accepted as one of the most effective approaches for bone defect regeneration relating to dental implant. Icariin is the main active ingredient in the extraction of total flavonoids from the Chinese traditional herb Epimediumbrevicornum Maxim. In this study, ICA was successfully incorporated into the nanofibers barrier membrane (ICA-SF/PLCL) as osteoinduction factor by coaxial electrospinning and was released in a sustained and controlled manner. The entire release period included two stages: an initial burst stage (47...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817740/influence-of-microtextured-implant-surfaces-on-peri-implantitis-and-its-treatment-a-preclinical-trial
#2
Juan C Rodriguez, Tapan Koticha, Diana L Eubanks, Ivan Rudek, Fred J Molz, Ludovica Chiavaccini, Andrew Claude, Steven Elder, Hom-Lay Wang
PURPOSE: The prevalence of peri-implantitis has increased significantly, forcing clinicians to search for ways to prevent it. Laser-microtextured surfaces promote soft tissue attachment and provide a tight seal around implants. Hence, the aim of this study was to examine the clinical, radiographic, and histologic features of ligature-induced peri-implantitis, as well as the effect of surgical treatment of these induced peri-implantitis lesions on laser-microtextured implants in a controlled animal model...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28794497/the-trophic-role-of-a-large-marine-predator-the-tiger-shark-galeocerdo-cuvier
#3
Luciana C Ferreira, Michele Thums, Michael R Heithaus, Adam Barnett, Kátya G Abrantes, Bonnie J Holmes, Lara M Zamora, Ashley J Frisch, Julian G Pepperell, Derek Burkholder, Jeremy Vaudo, Robert Nowicki, Jessica Meeuwig, Mark G Meekan
Tiger sharks were sampled off the western (Ningaloo Reef, Shark Bay) and eastern (the Great Barrier Reef; GBR, Queensland and New South Wales; NSW) coastlines of Australia. Multiple tissues were collected from each shark to investigate the effects of location, size and sex of sharks on δ(13)C and δ(15)N stable isotopes among these locations. Isotopic composition of sharks sampled in reef and seagrass habitats (Shark Bay, GBR) reflected seagrass-based food-webs, whereas at Ningaloo Reef analysis revealed a dietary transition between pelagic and seagrass food-webs...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28772618/bilayer-poly-lactic-co-glycolic-acid-nano-hydroxyapatite-membrane-with-barrier-function-and-osteogenesis-promotion-for-guided-bone-regeneration
#4
Li Fu, Zhanfeng Wang, Shujun Dong, Yan Cai, Yuxin Ni, Tianshou Zhang, Lin Wang, Yanmin Zhou
Guided bone regeneration (GBR) is one such treatment that reconstructs neo-bone tissue by using a barrier membrane to prevent the invasion of soft tissue and to create a space for guiding new bone growth into the bone defect. Herein, we report a novel functionally graded bilayer membrane (FGBM) for GBR application. To fabricate the novel membrane, the composites of poly(lactic-co-glycolic acid) and nano-hydroxyapatite were prepared by phase inversion for the dense layer and by electrospinning for another porous layer, and their corresponding properties were evaluated including surface morphology, mechanics, degradability, cell barrier function, and in vitro osteogenic bioactivity...
March 3, 2017: Materials
https://www.readbyqxmd.com/read/28745035/evaluation-of-complication-rates-and-vertical-bone-gain-after-guided-bone-regeneration-with-non-resorbable-membranes-versus-titanium-meshes-and-resorbable-membranes-a-randomized-clinical-trial
#5
Alessandro Cucchi, Elisabetta Vignudelli, Aldo Napolitano, Claudio Marchetti, Giuseppe Corinaldesi
BACKGROUND: The partial edentulous posterior mandible is often a challenge area that requires a bone reconstructive surgery for implants placement. PURPOSE: This RCT was aimed to evaluate complications rate and vertical bone gain after Guided Bone Regeneration (GBR) with dense non-resorbable d-PTFE titanium-reinforced membranes (Group A) versus titanium meshes covered by cross-linked collagen membranes (Group B). MATERIAL AND METHODS: 40 partially edentulous patients with atrophic posterior mandible, were randomly divided into two study group: 20 patients were treated with one stage GBR by means of non-resorbable d-PTFE titanium-reinforced membranes (Group A); and 20 patients, by means of titanium mesh covered by cross-linked collagen membranes (Group B)...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28732054/types-of-devices-used-in-ridge-split-procedure-for-alveolar-bone-expansion-a-systematic-review
#6
Nayansi Jha, Eun Ha Choi, Nagendra Kumar Kaushik, Jae Jun Ryu
The aim of this systematic review was to evaluate instrumentation procedures of the alveolar ridge expansion technique (ARST) with or without Guided Bone Regeneration (GBR) and to identify the most used instruments for successful outcome. An electronic as well as manual literature search was conducted in several databases including Medline, Embase, and Cochrane Central Register of Controlled Trials, for articles written in English up to September 2016. The question in focus was to identify the type of device for ridge expansion that is most frequently used and provides adequate bone expansion and implant success rate...
2017: PloS One
https://www.readbyqxmd.com/read/28719032/the-effect-of-experimental-diabetes-and-glycaemic-control-on-guided-bone-regeneration-histology-and-gene-expression-analyses
#7
M Retzepi, E Calciolari, I Wall, M P Lewis, N Donos
OBJECTIVES: To investigate the effect of experimental diabetes and metabolic control on intramembranous bone healing following guided bone regeneration (GBR). MATERIAL AND METHODS: Ninety-three Wistar rats were allocated to three experimental groups, healthy (H), uncontrolled diabetes (D) and controlled diabetes (CD). Twenty one days following diabetes induction, a standardised 5-mm defect was created at the mid-portion of each parietal bone. In 75 animals (25H, 25D, 25CD), one defect was treated with an intracranial and extracranial membrane according to the GBR principle, and one defect was left empty (control); five animals per group were then randomly sacrificed at 3, 7, 15, 30 and 60 days and processed for decalcified histology...
July 18, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28717963/the-role-of-multislice-computed-tomography-of-the-costal-cartilage-in-adult-age-estimation
#8
Kui Zhang, Fei Fan, Meng Tu, Jing-Hui Cui, Jing-Song Li, Zhao Peng, Zhen-Hua Deng
To establish population-specific age estimation models in adults from costal cartilage for contemporary Chinese by using three-dimensional volume-rendering technique. Five hundred and twelve individuals (254 females and 258 males) with documented ages between 20 and 85 years were retrospectively included. Their clinical CT examinations (1 mm slice thickness) were used to develop the sex-specific age prediction model. A validation sample comprising 26 female and 24 male individuals was then used to test the predictive accuracy of the established models...
July 17, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28713118/preserving-the-bone-profile-in-anterior-maxilla-using-an-equine-cortical-bone-membrane-and-an-equine-enzyme-treated-bone-graft-a-case-report-with-5-year-follow-up
#9
Danilo A Di Stefano, Umberto Garagiola, Mirko A Bassi
AIM: This study aimed to report a well-succeeded use of equine enzyme-deantigenic cortical membrane and bone granules for guided bone regeneration (GBR) in the esthetic zone concomitant with implant placement. BACKGROUND: In the anterior maxilla, where patients typically have the highest expectations for implant-supported restorations, bone resorption in the wake of tooth loss often leads to a lack of soft tissue support and ultimately to unsatisfactory esthetic results...
July 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28710858/identification-of-group-b-rotavirus-as-an-etiological-agent-in-the-gastroenteritis-outbreak-in-maharashtra-india
#10
Madhuri S Joshi, Nital N Ganorkar, Sujata S Ranshing, Atanu Basu, Nutan A Chavan, Varanasi Gopalkrishna
Acute gastroenteritis outbreak occurred at Pargaon, Maharashtra, India in 1789 cases with an attack rate of 32.5% between November to December 2015. The stool specimens (n = 32) were investigated for different enteric viral agents using conventional methods. Transmission electron microscopy and RNA polyacrylamide gel electrophoresis respectively identified morphologically distinct rotavirus particles in 28% and RNA migration pattern of Group B Rotavirus (GBR) in 72% of the specimens. Reverse transcription polymerase chain reaction and nucleotide sequencing confirmed presence of GBR in 97% of the samples analyzed...
July 15, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28691722/potential-role-of-dopamine-transporter-in-behavioral-flexibility
#11
Anita Cybulska-Klosowicz, Julia Dabrowska, Sebastian Niedzielec, Renata Zakrzewska, Aleksandra Rozycka
Behavioral flexibility is subserved by the prefrontal cortex and the basal ganglia. Orbitofrontal cortex (OFC) and dorsomedial striatum (DMS) form a functional frontocorticostriatal circuit crucial for the mediation of flexibility during reversal learning via dopamine (DA) neurotransmission. The regulatory control in maintaining DA homeostasis and function is provided by the dopamine transporter (DAT), which therefore likely plays a significant role in controlling the influence of DA on cognitive processes...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28653343/guided-bone-regeneration-at-zirconia-and-titanium-dental-implants-a-pilot-histological-investigation
#12
Goran I Benic, Daniel S Thoma, Ignacio Sanz-Martin, Fernando Munoz, Christoph H F Hämmerle, Antonio Cantalapiedra, Jens Fischer, Ronald E Jung
AIM: To test whether guided bone regeneration (GBR) of peri-implant defects at zirconia (ZrO2 ) implants differs from GBR at titanium (Ti) implants regarding the bone integration of the implant and of the grafting material. MATERIALS AND METHODS: Maxillary premolars and molars were extracted in seven dogs. After 5 months, four semi-saddle bone defects were created in each maxilla. Implant placement and simultaneous GBR were performed using the following randomly assigned modalities: (1) ZrO2 implant + deproteinized bovine bone mineral (DBBM) granules + a collagen membrane (CM), (2) ZrO2 implant + DBBM with 10% collagen matrix + CM, (3) ZrO2 implant + DBBM block + CM, and (4) Ti implant + DBBM granules + CM...
June 26, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28647227/in-vivo-cellular-reactions-to-different-biomaterials-physiological-and-pathological-aspects-and-their-consequences
#13
REVIEW
Sarah Al-Maawi, Anna Orlowska, Robert Sader, C James Kirkpatrick, Shahram Ghanaati
Biomaterials are widely used in guided bone regeneration (GBR) and guided tissue regeneration (GTR). After application, there is an interaction between the host immune system and the implanted biomaterial, leading to a biomaterial-specific cellular reaction. The present review focuses on cellular reactions to numerous biomaterials in vivo with consideration of different implantation models and microenvironments in different species, such as subcutaneous implantation in mice and rats, a muscle model in goats and a femur model in rabbits...
June 21, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28646518/comparative-proteomics-and-protein-profile-related-to-phenolic-compounds-and-antioxidant-activity-in-germinated-oryza-sativa-kdml105-and-thai-brown-rice-mali-dang-for-better-nutritional-value
#14
Sarunyaporn Maksup, Sarintip Pongpakpian, Sittiruk Roytrakul, Suriyan Cha-Um, Kanyaratt Supaibulwatana
BACKGROUND: Brown rice (BR) and germinated brown rice (GBR) are considered as a prime source of carbohydrate and bioactive compounds for more than half of the world's populations. Several studies have reported on the proteomics of BR and GBR; however, the proteomic profiles related to the synthesis of bioactive compounds are less well documented. In this study, BR and GBR were used in a comparative analysis of the proteomic and bioactive compound profiles for two famous Thai rice varieties, Khao Dawk Mali 105 (KDML) and Mali Dang (MD)...
June 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28643223/the-effect-of-membrane-exposure-on-lateral-ridge-augmentation-a-case-controlled-study
#15
Mehmet A Eskan, Marie-Eve Girouard, Dean Morton, Henry Greenwell
BACKGROUND: The effect of membrane exposure on guided bone regeneration (GBR) for lateral ridge augmentation has been poorly addressed. This case-controlled study aimed to investigate potential effect of membrane exposure lateral ridge augmentation and subsequent implant placement. METHODS: A total of 14 patients that did receive lateral ridge augmentation procedure using allogeneic cancellous graft particulate in combination with an alloplastic bioresorbable matrix barrier were retrospectively selected for this study...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28638369/diversity-and-activity-of-diazotrophs-in-great-barrier-reef-surface-waters
#16
Lauren F Messer, Mark V Brown, Miles J Furnas, Richard L Carney, A D McKinnon, Justin R Seymour
Discrepancies between bioavailable nitrogen (N) concentrations and phytoplankton growth rates in the oligotrophic waters of the Great Barrier Reef (GBR) suggest that undetermined N sources must play a significant role in supporting primary productivity. One such source could be biological dinitrogen (N2) fixation through the activity of "diazotrophic" bacterioplankton. Here, we investigated N2 fixation and diazotroph community composition over 10° S of latitude within GBR surface waters. Qualitative N2 fixation rates were found to be variable across the GBR but were relatively high in coastal, inner and outer GBR waters, reaching 68 nmol L(-1) d(-1)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28628357/continuous-periosteal-strapping-sutures-cpss-for-fixation-of-osseous-grafts-with-resorbable-membranes-for-buccal-ridge-augmentation
#17
Tamir Shalev, Gregori M Kurtzman, Alon H Shalev, Deborah K Johnson, Mark Elias Kersten
GBR is a technique sensitive procedure that routinely involves placement of particulate bone with or without fixation screws and either a resorbable or a non-resorbable membrane. Grafting of the buccal-crestal aspect of the implant site can be particularly challenging as external pressure from the flap or occlusal forces may displace the graft laterally and apically resulting in deficient bone in the desired region. A novel technique for stabilizing a resorbable membrane and underlying particulate graft allowing for predictable bone grafting across multiple edentulous sites...
June 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28617576/ex-vivo-measurement-of-electrically-evoked-dopamine-release-in-zebrafish-whole-brain
#18
Mimi Shin, Thomas M Field, Chase S Stucky, Mia N Furgurson, Michael A Johnson
Zebrafish (Danio rerio) have recently emerged as useful model organism for the study of neuronal function. Here, fast-scan cyclic voltammetry (FSCV) at carbon-fiber microelectrodes was used to measure locally evoked dopamine release and uptake in zebrafish whole brain preparations and results were compared with those obtained from brain slices. Evoked dopamine release ([DA]max) was similar in whole brain and sagittal brain slice preparations (0.49 ± 0.13 μM in whole brain and 0.59 ± 0.28 μM in brain slices)...
June 28, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28610340/myxosporea-cnidaria-myxozoa-infecting-the-saddled-seabream-oblada-melanura-l-1758-teleostei-sparidae-and-the-painted-comber-serranus-scriba%C3%A2-l-1758-teleostei-serranidae-in-tunisia
#19
Sayef Laamiri
First parasitological surveys of Myxozoa are performed on the sparid saddled seabream Oblada melanura (Linnaeus, 1758) and the serranid painted comber Serranus scriba (Linnaeus, 1758) caught from the Bay of Bizerte and the Gulf of Tunis respectively in Northeast Tunisia, Western Mediterranean. In this study, 6 bivalvulid myxosporean species belonging to the 3 genera Ceratomyxa Thélohan, 1892, Myxodavisia Zhao, Zhou, Kent & Whipps, 2008 and Zschokkella Auerbach, 1910, are isolated infecting their hosts. Two species Ceratomyxa sp...
May 19, 2017: Zootaxa
https://www.readbyqxmd.com/read/28593053/natural-graft-tissues-and-synthetic-biomaterials-for-periodontal-and-alveolar-bone-reconstructive-applications-a-review
#20
REVIEW
Zeeshan Sheikh, Nader Hamdan, Yuichi Ikeda, Marc Grynpas, Bernhard Ganss, Michael Glogauer
Periodontal disease is categorized by the destruction of periodontal tissues. Over the years, there have been several clinical techniques and material options that been investigated for periodontal defect repair/regeneration. The development of improved biomaterials for periodontal tissue engineering has significantly improved the available treatment options and their clinical results. Bone replacement graft materials, barrier membranes, various growth factors and combination of these have been used. The available bone tissue replacement materials commonly used include autografts, allografts, xenografts and alloplasts...
2017: Biomaterials Research
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