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https://www.readbyqxmd.com/read/29038630/effect-of-alveolar-segmental-sandwich-osteotomy-on-alveolar-height-a-preliminary-study
#1
Karan S Mehta, Kavitha Prasad, Vibha Shetty, Krishnappa Ranganath, R M Lalitha, Jayashree Dexith, Sejal K Munoyath, Vineeth Kumar
PURPOSE: Bone loss following extraction is maximum in horizontal dimension. Height is also reduced which is pronounced on the buccal aspect. Various surgical procedures are available to correct the bone volume viz. GBR, onlay bone grafting, alveolar distraction and sandwich osteotomy. Sandwich osteotomy has been found to increase the vertical alveolar bone height successfully. OBJECTIVES: The objective of the study was to assess the effect of alveolar segmental sandwich osteotomy on alveolar height and crestal width...
December 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/29028848/the-stability-of-augmented-bone-between-two-different-membranes-used-for-guided-bone-regeneration-simultaneous-with-dental-implant-placement-in-the-esthetic-zone
#2
Sirida Arunjaroensuk, Soontra Panmekiate, Atiphan Pimkhaokham
PURPOSE: This randomized controlled clinical trial compared the stability of augmented bone between a synthetic resorbable membrane and a collagen resorbable membrane with guided bone regeneration (GBR) simultaneous with dental implant placement in the esthetic zone in terms of facial bone thickness. MATERIALS AND METHODS: A total of 60 dental implants from patients requiring implant placement with simultaneous GBR in the esthetic zone were equally allocated to the test group or control group by block randomization...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29023623/vertical-guided-bone-regeneration-for-a-single-missing-tooth-span-with-titanium-reinforced-d-ptfe-membranes-clinical-considerations-and-observations-of-10-consecutive-cases-with-up-to-36-months-follow-up
#3
Ran Herzberg
Vertical guided bone regeneration (GBR) using titanium-reinforced polytetrafluoroethylene (PTFE) membranes is a well-established technique and is considered technique sensitive. When using PTFE membranes, complications usually arise in the crestal incision or next to the neighboring tooth of the treated span. Most studies available describe either distal free end or multiple missing teeth span situations. Treating a single missing tooth span combines the challenge of two neighboring teeth and a smaller flap, which is more difficult to adapt to the augmented environment...
November 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29018818/the-mechanical-properties-and-biometrical-effect-of-3d-preformed-titanium-membrane-for-guided-bone-regeneration-on-alveolar-bone-defect
#4
So-Hyoun Lee, Jong-Hoon Moon, Chang-Mo Jeong, Eun-Bin Bae, Chung-Eun Park, Gye-Rok Jeon, Jin-Ju Lee, Young-Chan Jeon, Jung-Bo Huh
The purpose of this study is to evaluate the effect of three-dimensional preformed titanium membrane (3D-PFTM) to enhance mechanical properties and ability of bone regeneration on the peri-implant bone defect. 3D-PFTMs by new mechanically compressive molding technology and manually shaped- (MS-) PFTMs by hand manipulation were applied in artificial peri-implant bone defect model for static compressive load test and cyclic fatigue load test. In 12 implants installed in the mandibular of three beagle dogs, six 3D-PFTMs, and six collagen membranes (CM) randomly were applied to 2...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28990654/analysis-of-volatiles-in-brown-rice-germinated-brown-rice-and-selenized-germinated-brown-rice-during-storage-at-different-vacuum-levels
#5
Kunlun Liu, Shuang Zhao, Yang Li, Fusheng Chen
BACKGROUND: The quality of nutritionally enhanced foods can be determined by evaluating changes in the volatile compounds produced in these foods over time. In this work, selenium-enriched germinated brown rice (Se-GBR), germinated brown rice (GBR), and brown rice (BR) stored under 90% relative humidity, 38°C, and various vacuum levels were investigated. The relative abundance and differences of volatile compounds in Se-GBR, GBR, and BR over various storage periods were detected. The correlation of volatile compound abundance with vacuum level and storage time was analyzed using principal component analysis (PCA)...
October 9, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28980059/avoiding-implementation-failure-in-catchment-landscapes-a-case-study-in-governance-of-the-great-barrier-reef
#6
Allan P Dale, Karen Vella, Margaret Gooch, Ruth Potts, Robert L Pressey, Jon Brodie, Rachel Eberhard
Water quality outcomes affecting Australia's Great Barrier Reef (GBR) are governed by multi-level and multi-party decision-making that influences forested and agricultural landscapes. With international concern about the GBR's declining ecological health, this paper identifies and focuses on implementation failure (primarily at catchment scale) as a systemic risk within the overall GBR governance system. There has been limited integrated analysis of the full suite of governance subdomains that often envelop defined policies, programs and delivery activities that influence water quality in the GBR...
October 4, 2017: Environmental Management
https://www.readbyqxmd.com/read/28976988/presence-of-skeletal-banding-in-a-reef-building-tropical-crustose-coralline-alga
#7
Bonnie Lewis, Janice M Lough, Merinda C Nash, Guillermo Diaz-Pulido
The presence of banding in the skeleton of coralline algae has been reported in many species, primarily from temperate and polar regions. Similar to tree rings, skeletal banding can provide information on growth rate, age, and longevity; as well as records of past environmental conditions and the coralline alga's growth responses to such changes. The aim of this study was to explore the presence and characterise the nature of banding in the tropical coralline alga Porolithon onkodes, an abundant and key reef-building species on the Great Barrier Reef (GBR) Australia, and the Indo-Pacific in general...
2017: PloS One
https://www.readbyqxmd.com/read/28961487/esr-investigations-of-gamma-irradiated-medical-devices
#8
N Selcan Turker, A Yekta Özer, Şeyda Çolak, Burak Kutlu, Rahime Nohutçu
Guided tissue regeneration (GTR) and guided bone regeneration (GBR) biomaterials have been employed in recent years for periodontal procedures. In the present study, widely used dental GTR/GBR biomaterials (grafts: G1, G2, G3 and membranes: M1, M2, M3, M4) were exposed to gamma irradiation at an absorbed dose range of 0-50kGy and the radiolytic intermediates that have been created in the samples upon irradiation were characterized in detail by Electron Spin Resonance (ESR) spectroscopy. We aimed to standardize the measurement conditions for practical applications of gamma radiation sterilization of GTR/GBR biomaterials...
September 21, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28951742/guided-bone-regeneration-using-collagen-scaffolds-growth-factors-and-periodontal-ligament-stem-cells-for-treatment-of-peri-implant-bone-defects-in-vivo
#9
Peer W Kämmerer, Malte Scholz, Maria Baudisch, Jan Liese, Katharina Wegner, Bernhard Frerich, Hermann Lang
INTRODUCTION: The aim of the study was an evaluation of different approaches for guided bone regeneration (GBR) of peri-implant defects in an in vivo animal model. MATERIALS AND METHODS: In minipigs (n = 15), peri-implant defects around calcium phosphate- (CaP-; n = 46) coated implants were created and randomly filled with (1) blank, (2) collagen/hydroxylapatite/β-tricalcium phosphate scaffold (CHT), (3) CHT + growth factor cocktail (GFC), (4) jellyfish collagen matrix, (5) jellyfish collagen matrix + GFC, (6) collagen powder, and (7) collagen powder + periodontal ligament stem cells (PDLSC)...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28947902/demineralized-freeze-dried-bovine-cortical-bone-its-potential-for-guided-bone-regeneration-membrane
#10
David B Kamadjaja, Achmad Harijadi, Pratiwi Soesilawati, Eny Wahyuni, Nurul Maulidah, Akhsanal Fauzi, Fika Rah Ayu, Roberto Simanjuntak, R Soesanto, Djodi Asmara, Andra Rizqiawan, Peter Agus, Coen Pramono
BACKGROUND: Bovine pericardium collagen membrane (BPCM) had been widely used in guided bone regeneration (GBR) whose manufacturing process usually required chemical cross-linking to prolong its biodegradation. However, cross-linking of collagen fibrils was associated with poorer tissue integration and delayed vascular invasion. OBJECTIVE: This study evaluated the potential of bovine cortical bone collagen membrane for GBR by evaluating its antigenicity potential, cytotoxicity, immune and tissue response, and biodegradation behaviors...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28938030/wound-healing-complications-following-guided-bone-regeneration-for-ridge-augmentation-a-systematic-review-and-meta-analysis
#11
Glendale Lim, Guo-Hao Lin, Alberto Monje, Hsun-Liang Chan, Hom-Lay Wang
PURPOSE: The rate of developing soft tissue complications that accompany guided bone regeneration (GBR) procedures varies widely, from 0% to 45%. The present review was conducted to investigate the rate for resorbable versus nonresorbable membranes and the timing of soft tissue complications. MATERIALS AND METHODS: Electronic and manual literature searches were conducted by two independent reviewers using several databases, including MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane Oral Health Group Trials Register, for articles published through July 2015, with no language restriction...
September 22, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28902637/development-of-fish-collagen-bioactive-glass-chitosan-composite-nanofibers-as-a-gtr-gbr-membrane-for-inducing-periodontal-tissue-regeneration
#12
Tian Zhou, Xin Liu, Baiyan Sui, Chao Liu, Xiumei Mo, Jiao Sun
The development of a guided tissue or bone regeneration (GTR/GBR) membrane with excellent performance has been a major challenge in the biomedical field. The present study was designed to prepare a biomimetic electrospun fish collagen/bioactive glass/chitosan (Col/BG/CS) composite nanofiber membrane and determine its structure, mechanical property, antibacterial activity, and biological effects on human periodontal ligament cells (HPDLCs). The effects of this composite membrane on inducing periodontal tissue regeneration were evaluated using a dog class II furcation defect model...
September 13, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28893981/u-th-dating-reveals-regional-scale-decline-of-branching-acropora-corals-on-the-great-barrier-reef-over-the-past-century
#13
Tara R Clark, George Roff, Jian-Xin Zhao, Yue-Xing Feng, Terence J Done, Laurence J McCook, John M Pandolfi
Hard coral cover on the Great Barrier Reef (GBR) is on a trajectory of decline. However, little is known about past coral mortality before the advent of long-term monitoring (circa 1980s). Using paleoecological analysis and high-precision uranium-thorium (U-Th) dating, we reveal an extensive loss of branching Acropora corals and changes in coral community structure in the Palm Islands region of the central GBR over the past century. In 2008, dead coral assemblages were dominated by large, branching Acropora and living coral assemblages by genera typically found in turbid inshore environments...
September 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28883506/deep-reef-fish-assemblages-of-the-great-barrier-reef-shelf-break-australia
#14
Tiffany L Sih, Mike Cappo, Michael Kingsford
Tropical mesophotic and sub-mesophotic fish ecology is poorly understood despite increasing vulnerability of deeper fish assemblages. Worldwide there is greater fishing pressure on continental shelf-breaks and the effects of disturbances on deeper fish species have not yet been assessed. Difficult to access, deeper reefs host undocumented fish diversity and abundance. Baited Remote Underwater Video Stations (BRUVS) with lights were used to sample deeper habitats (54-260 m), in the Great Barrier Reef (GBR), Australia...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28875278/investigation-of-peri-implant-tissue-conditions-and-peri-implant-tissue-stability-in-implants-placed-with-simultaneous-augmentation-procedure-a-3-year-retrospective-follow-up-analysis-of-a-newly-developed-bone-level-implant-system
#15
Jonas Lorenz, Henriette Lerner, Robert A Sader, Shahram Ghanaati
BACKGROUND: Guided bone regeneration (GBR) has been proven to be a reliable therapy to regenerate missing bone in cases of atrophy of the alveolar crest. The aim of the present retrospective analysis was to assess peri-implant tissue conditions and document peri-implant tissue stability in C-Tech implants when placed simultaneously with a GBR augmentation procedure. METHODS: A total of 47 implants, which were placed simultaneously with a GBR procedure with a synthetic bone substitute material in 20 patients, were investigated clinically and radiologically at least 3 years after loading...
September 5, 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28866225/fabrication-and-characterization-of-two-layered-nanofibrous-membrane-for-guided-bone-and-tissue-regeneration-application
#16
Maryam Masoudi Rad, Saied Nouri Khorasani, Laleh Ghasemi-Mobarakeh, Molamma P Prabhakaran, Mohammad Reza Foroughi, Mahshid Kharaziha, Niloufar Saadatkish, Seeram Ramakrishna
Membranes used in dentistry act as a barrier to prevent invasion of intruder cells to defected area and obtains spaces that are to be subsequently filled with new bone and provide required bone volume for implant therapy when there is insufficient volume of healthy bone at implant site. In this study a two-layered bioactive membrane were fabricated by electrospinning whereas one layer provides guided bone regeneration (GBR) and fabricated using poly glycerol sebacate (PGS)/polycaprolactone (PCL) and Beta tri-calcium phosphate (β-TCP) (5, 10 and 15%) and another one containing PCL/PGS and chitosan acts as guided tissue regeneration (GTR)...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28866191/nanosized-cap-silk-fibroin-pcl-peg-pcl-pcl-based-bilayer-membranes-for-guided-bone-regeneration
#17
Sibel Türkkan, A Engin Pazarçeviren, Dilek Keskin, Nesrin E Machin, Özgür Duygulu, Ayşen Tezcaner
Guided bone regeneration (GBR) concept has been developed to prevent the formation of non-functional scar tissue layer on defect site by undertaking barrier role. In this study, a new bilayer membrane which consisted of one layer of electrospun silk fibroin/PCL-PEG-PCL incorporating nanocalcium phosphate (SPCA)(1) and one layer of PCL membrane was developed for GBR. To improve the osteoconductivity of membranes, nanosized calcium phosphate particles synthesized by Flame Spray Pyrolysis method were incorporated into membranes at 10% (wt) (SPCA10) and 20% (wt) (SPCA20) of the polymer content...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28862689/the-efficacy-of-electron-beam-irradiated-bacterial-cellulose-membranes-as-compared-with-collagen-membranes-on-guided-bone-regeneration-in-peri-implant-bone-defects
#18
So-Hyoun Lee, Sung-Jun An, Youn-Mook Lim, Jung-Bo Huh
Bacterial cellulose (BC) is a natural polysaccharide produced by some bacteria, and consists of a linear polymer linked by β-(1,4) glycosidic bonds. BC has been developed as a material for tissue regeneration purposes. This study was conducted to evaluate the efficacy of resorbable electron beam irradiated BC membranes (EI-BCMs) for guided bone regeneration (GBR). The electron beam irradiation (EI) was introduced to control the biodegradability of BC for dental applications. EI-BCMs had higher porosity than collagen membranes (CMs), and had similar wet tensile strengths to CMs...
September 1, 2017: Materials
https://www.readbyqxmd.com/read/28852089/reproductive-benefits-of-no-take-marine-reserves-vary-with-region-for-an-exploited-coral-reef-fish
#19
A B Carter, C R Davies, M J Emslie, B D Mapstone, G R Russ, A J Tobin, A J Williams
No-take marine reserves (NTMRs) are expected to benefit fisheries via the net export of eggs and larvae (recruitment subsidy) from reserves to adjacent fished areas. Quantifying egg production is the first step in evaluating recruitment subsidy potential. We calculated annual egg production per unit area (EPUA) from 2004 to 2013 for the commercially important common coral trout, Plectropomus leopardus, on fished and NTMR reefs throughout the Great Barrier Reef (GBR), Australia. Geographic region, NTMR status, fish size, and population density were all found to affect EPUA...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28833567/guided-bone-regeneration-materials-and-biological-mechanisms-revisited
#20
REVIEW
Ibrahim Elgali, Omar Omar, Christer Dahlin, Peter Thomsen
Guided bone regeneration (GBR) is commonly used in combination with the installment of titanium implants. The application of a membrane to exclude non-osteogenic tissues from interfering with bone regeneration is a key principle of GBR. Membrane materials possess a number of properties which are amenable to modification. A large number of membranes have been introduced for experimental and clinical verification. This prompts the need for an update on membrane properties and the biological outcomes, as well as a critical assessment of the biological mechanisms governing bone regeneration in defects covered by membranes...
October 2017: European Journal of Oral Sciences
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