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https://www.readbyqxmd.com/read/28339109/validation-of-dynamic-treatment-couch-tracking-for-prostate-sbrt
#1
Stefanie Ehrbar, Simon Schmid, Alexander Jöhl, Stephan Klöck, Matthias Guckenberger, Oliver Riesterer, Stephanie Tanadini-Lang
PURPOSE: In stereotactic body radiation therapy (SBRT) of prostatic cancer, a high dose per fraction is applied to the target with steep dose gradients. Intrafractional prostate motion can occur unpredictably during the treatment and lead to target miss. This work investigated the dosimetric benefit of motion compensation with dynamic treatment-couch tracking for prostate SBRT treatments in the presence of prostatic motion. METHODS: Ten SBRT treatment plans for prostate cancer patients with integrated boosts to their index lesion were prepared...
March 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28338390/biologic-remodeling-of-periodontal-dimensions-of-areas-treated-with-gingival-augmentation-procedure-gap-a-25-year-follow-up-observation
#2
Giancarlo Agudio, Leandro Chambrone, Giovanpaolo Pini Prato
BACKGROUND: The role of keratinized tissue (KT) for maintenance of periodontal health has been debated for many years. This study assessed the long-term "biologic remodeling" of periodontal dimensions of teeth treated with free gingival grafts (FGG) compared to their adjacent/untreated teeth. METHODS: Seventy-four patients, with at least one site showing absence or a reduced amount of attached gingiva associated with gingival recession at baseline, were treated with FGG in a private practice...
March 24, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28338039/coronally-advanced-flap-combined-with-connective-tissue-graft-treatment-of-choice-for-root-coverage-following-recession
#3
Ed Madeley, Brett Duane
Data sourcesMedline, The Cochrane Database Trials Register, Embase, supplemented by handsearching of five prominent periodontal journals, references from reviewed papers and contact with experts in the field of mucogingival surgery.Study selectionRandomised controlled trials (RCTs) with or without a split-mouth design, on human patients. RCTs had to compare at least two different surgical interventions on clearly specified recession defects, be over six months in duration and have clearly specified clinical measurements regarding root coverage...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28337820/selective-radiofrequency-stimulation-of-the-dorsal-root-ganglion-drg-as-a-method-for-predicting-targets-for-neuromodulation-in-patients-with-post-amputation-pain-a-case-series
#4
Corey W Hunter, Ajax Yang, Tim Davis
OBJECTIVE: While spinal cord stimulation (SCS) has established itself as an accepted and validated treatment for neuropathic pain, there are a number of conditions where it has experienced less, long-term success: post amputee pain (PAP) being one of them. Dorsal root ganglion (DRG) stimulation has shown great promise, particularly in conditions where traditional SCS has fallen short. One major difference between DRG stimulation and traditional SCS is the ability to provide focal stimulation over targeted areas...
March 23, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28331369/comparison-of-conventional-and-semilunar-coronally-positioned-flap-techniques-for-root-coverage-in-teeth-with-cervical-abrasion-restored-with-pink-resin
#5
Felipe Rychuv Santos, Carmen Lucia Mueller Storrer, Emanuelle Juliana Cunha, Lucienne M Ulbrich, Camilo Andress Villabona Lopez, Tatiana Miranda Deliberador
Gingival recession is the most common mucogingival defect, characterized by apical migration of the gingival margin from the cementoenamel junction and root exposure. Several surgical techniques are reported for the treatment of gingival recession. Here we present a comparison of the conventional (coronally advanced flap) and semilunar coronally positioned flap techniques for root coverage in teeth with cervical abrasion restored with pink resin that mimics the color of the gingiva. Although the conventional technique is more predictable, we found that both techniques were effective in achieving satisfactory and esthetic root coverage...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28327193/longitudinal-evaluation-of-aortic-hemodynamics-in-marfan-syndrome-new-insights-from-a-4d-flow-cardiovascular-magnetic-resonance-multi-year-follow-up-study
#6
Julia Geiger, Daniel Hirtler, Kristina Gottfried, Ozair Rahman, Emilie Bollache, Alex J Barker, Michael Markl, Brigitte Stiller
BACKGROUND: The aim of this 4D flow cardiovascular magnetic resonance (CMR) follow-up study was to investigate longitudinal changes in aortic hemodynamics in adolescent patients with Marfan syndrome (MFS). METHODS: 4D flow CMR for the assessment of in-vivo 3D blood flow with full coverage of the thoracic aorta was performed twice (baseline scan t1/follow-up scan t2) in 19 adolescent MFS patients (age at t1: 12.7 ± 3.6 years, t2: 16.2 ± 4.3 years) with a mean follow-up duration of 3...
March 22, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28304210/long-term-stability-of-root-coverage-by-coronally-advanced-flap-procedures
#7
Karin Jepsen, Martina Stefanini, Mariano Sanz, Giovanni Zucchelli, Søren Jepsen
BACKGROUND: To compare 6 months and 3-year outcomes for root coverage by coronally advanced flap (CAF) procedures in localized gingival recessions. METHODS: Two centers that had participated in a 6 months multinational multicentre RCT were able to follow up 18 patients with 36 Miller Class I and II defects that had been treated in a split-mouth design with CAF or CAF + xenogeneic collagen matrix (CMX). Percentage of root coverage (RC), complete root coverage (CRC), width (KT) and thickness (GT) of keratinized tissue were assessed by the same blinded examiners as after 6 months...
March 17, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28298827/sub-epithelial-connective-tissue-graft-for-root-coverage-in-nonsmokers-and-smokers-a-pilot-comparative-clinical-study
#8
Chini Doraswamy Dwarakanath, Bheemavarapu Divya, Gottumukkala Naga Venkata Satya Sruthima, Gautami Subadra Penmetsa
BACKGROUND: Gingival recession is a common condition and is more prevalent in smokers. It is widely believed that root coverage procedures in smokers result in less desirable outcome compared to nonsmokers', and there are few controlled studies in literature to support this finding. Therefore, the purpose of this study was to evaluate and compare the outcome of root coverage with sub-epithelial connective tissue graft (SCTG) in nonsmokers and smokers. MATERIALS AND METHODS: A sample of twenty subjects, 10 nonsmokers and 10 smokers were selected each with at least 1 Miller's Class I or II recession on a single rooted tooth...
July 2016: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/28267830/build-angle-does-it-influence-the-accuracy-of-3d-printed-dental-restorations-using-digital-light-processing-technology
#9
Reham B Osman, Nawal Alharbi, Daniel Wismeijer
PURPOSE: The aim of this study was to evaluate the effect of the build orientation/build angle on the dimensional accuracy of full-coverage dental restorations manufactured using digital light-processing technology (DLP-AM). MATERIALS AND METHODS: A full dental crown was digitally designed and 3D-printed using DLP-AM. Nine build angles were used: 90, 120, 135, 150, 180, 210, 225, 240, and 270 degrees. The specimens were digitally scanned using a high-resolution optical surface scanner (IScan D104i, Imetric)...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28261691/graphene-metal-composite-sensors-with-near-zero-temperature-coefficient-of-resistance
#10
Brandon C Marin, Samuel E Root, Armando D Urbina, Eden Aklile, Rachel Miller, Aliaksandr V Zaretski, Darren J Lipomi
This article describes the design of piezoresistive thin-film sensors based on single-layer graphene decorated with metallic nanoislands. The defining characteristic of these composite thin films is that they can be engineered to exhibit a temperature coefficient of resistance (TCR) that is close to zero. A mechanical sensor with this property is stable against temperature fluctuations of the type encountered during operations in the real world, for example, in a wearable sensor. The metallic nanoislands are grown on graphene through thermal deposition of metals (gold or palladium) at a low nominal thickness...
February 28, 2017: ACS Omega
https://www.readbyqxmd.com/read/28260616/impact-of-grass-cover-on-the-magnetic-susceptibility-measurements-for-assessing-metal-contamination-in-urban-topsoil
#11
Nessa Golden, Chaosheng Zhang, Aaron P Potito, Paul J Gibson, Norma Bargary, Liam Morrison
In recent decades, magnetic susceptibility monitoring has developed as a useful technique in environmental pollution studies, particularly metal contamination of soil. This study provides the first ever examination of the effects of grass cover on magnetic susceptibility (MS) measurements of underlying urban soils. Magnetic measurements were taken in situ to determine the effects on κ (volume magnetic susceptibility) when the grass layer was present (κ(grass)) and after the grass layer was trimmed down to the root (κ(no grass))...
March 2, 2017: Environmental Research
https://www.readbyqxmd.com/read/28257218/modified-double-papillae-flap-technique-with-subepithelial-connective-tissue-graft-for-root-coverage-in-the-esthetic-zone-case-report
#12
Gustavo Javier Salazar Littuma, Leonardo Bez, Camilo Andres Villabona Lopez, Cesar Augusto Magalhães Benfatti, Ricardo de Souza Magini
Gingival recession can compromise the esthetic appearance, leading to functional problems, hypersensitivity, and root caries. Several techniques have been implicated for root coverage, which includes pedicle grafts, free gingival grafts, connective tissue grafts, and guided-tissue regeneration. The double-papillae flap associated with subepithelial connective tissue is a predictable technique to cover isolated areas with insufficient attached gingiva apical to a recession. This case report demonstrates a surgical alternative to the technique using a sling periosteal suture to stabilize the connective tissue and pedicle flap during the initial phase of healing, increasing the potential of this periodontal procedure for gingival recession coverage...
March 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28245064/a-global-fine-root-ecology-database-to-address-below-ground-challenges-in-plant-ecology
#13
Colleen M Iversen, M Luke McCormack, A Shafer Powell, Christopher B Blackwood, Grégoire T Freschet, Jens Kattge, Catherine Roumet, Daniel B Stover, Nadejda A Soudzilovskaia, Oscar J Valverde-Barrantes, Peter M van Bodegom, Cyrille Violle
Variation and tradeoffs within and among plant traits are increasingly being harnessed by empiricists and modelers to understand and predict ecosystem processes under changing environmental conditions. While fine roots play an important role in ecosystem functioning, fine-root traits are underrepresented in global trait databases. This has hindered efforts to analyze fine-root trait variation and link it with plant function and environmental conditions at a global scale. This Viewpoint addresses the need for a centralized fine-root trait database, and introduces the Fine-Root Ecology Database (FRED, http://roots...
February 28, 2017: New Phytologist
https://www.readbyqxmd.com/read/28231619/connective-tissue-graft-and-tunnel-or-trapezoidal-flap-for-the-treatment-of-single-maxillary-gingival-recessions-a-randomized-clinical-trial
#14
Mauro Pedrine Santamaria, Felipe Lucas da Silva Neves, Camila Augusto Silveira, Ingrid Fernandes Mathias, Stephanie Botti Fernandes-Dias, Maria Aparecida Neves Jardini, Dimitris N Tatakis
BACKGROUND: Although ample evidence supports connective tissue graft (CTG) use for root coverage, there is need for research on recipient site preparation approaches. The purpose of this study was to compare the outcomes of trapezoidal coronally advanced flap (CAF) and coronally advanced tunnel flap (TUN) when used in conjunction with CTG. METHODS: Forty-two patients presenting 42 single maxillary, Miller Class I and II, gingival recession defects were randomly assigned to receive either CAF+CTG (N=21) or TUN+CTG (N=21)...
February 23, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28216846/three-dimensional-finite-element-analysis-of-the-stress-distribution-pattern-in-a-mandibular-first-molar-tooth-restored-with-five-different-restorative-materials
#15
Kathleen Manuela D'souza, Meena Ajay Aras
INTRODUCTION: Badly broken or structurally compromised posterior teeth are frequently associated with crown/root fracture. Numerous restorative materials have been used to fabricate indirect full-coverage restorations for such teeth. This study aims to evaluate and compare the effect of restorative materials on the stress distribution pattern in a mandibular first molar tooth, under varying loading conditions and to compare the stress distribution pattern in five commonly used indirect restorative materials...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28196288/clinical-adequacy-assessment-of-auto-contours-for-prostate-imrt-with-meaningful-endpoints
#16
Hamidreza Nourzadeh, William T Watkins, Mahmoud Ahmad, Cheukkai Hui, David Schlesinger, Jeffrey V Siebers
PURPOSE: To determine if radiation treatment plans created based on auto-segmented (AS) regions-of-interest (ROI)s are clinically equivalent to plans created based on manually segmented ROIs, where equivalence is evaluated using probabilistic dosimetric metrics and probabilistic biological endpoints for prostate IMRT. METHOD AND MATERIALS: Manually drawn contours and auto-segmented ROIs were created for 167 CT image sets acquired from 19 prostate patients. Auto-segmentation was performed utilizing Pinnacle's Smart Probabilistic Image Contouring Engine...
February 14, 2017: Medical Physics
https://www.readbyqxmd.com/read/28196169/the-use-of-platelet-rich-fibrin-versus-subepithelial-connective-tissue-graft-in-treatment-of-multiple-gingival-recessions-a-randomized-clinical-trial
#17
Elif Öncü
The objective of this study was to evaluate the clinical effectiveness of platelet-rich fibrin (PRF) membrane used in combination with a modified coronally advanced flap (MCAF) and to compare it with the use of a subepithelial connective tissue graft (SCTG) in combination with a MCAF in treatment of Miller Class I and II bilateral multiple gingival recessions. A total of 20 patients with multiple Miller Class I and II maxillary gingival recession defects participated in this randomized, split-mouth, controlled study...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28196164/a-novel-modification-of-semilunar-coronally-advanced-flap-for-the-treatment-of-gingival-recession-case-series
#18
Mauro Pedrine Santamaria, Miki Taketomi Saito, Ingrid Fernandes Mathias, Camila Augusto Silveira, Marcio Zaffalon Casati, Enilson Antônio Sallum, Renato Correa Casarin
This article aims to describe a modification of the semilunar coronally advanced flap. A total of 12 systemically and periodontally healthy patients presenting Miller Class I gingival recession were treated with the modified semilunar coronally advanced flap technique described in this article. After 1 year of follow-up, the mean root coverage was 85.4% ± 24.7%. Significant gingival recession reduction, clinical attachment gain, and reduction in dentin sensitivity was observed 1 year after surgery. This novel semilunar coronally advanced flap technique was demonstrated to be effective for root coverage in Miller Class I gingival recessions...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28192471/the-abundance-and-diversity-of-arbuscular-mycorrhizal-fungi-are-linked-to-the-soil-chemistry-of-screes-and-to-slope-in-the-alpic-paleo-endemic-berardia-subacaulis
#19
Gabriele Casazza, Erica Lumini, Enrico Ercole, Francesco Dovana, Maria Guerrina, Annamaria Arnulfo, Luigi Minuto, Anna Fusconi, Marco Mucciarelli
Berardia subacaulis Vill. is a monospecific genus that is endemic to the South-western Alps, where it grows on alpine screes, which are extreme habitats characterized by soil disturbance and limiting growth conditions. Root colonization by arbuscular mycorrhizal fungi (AMF) is presumably of great importance in these environments, because of its positive effect on plant nutrition and stress tolerance, as well as on structuring the soil. However, there is currently a lack of information on this topic. In this paper, we tested which soil characteristics and biotic factors could contribute to determining the abundance and community composition of AMF in the roots of B...
2017: PloS One
https://www.readbyqxmd.com/read/28166072/gender-based-comparison-of-gingival-zenith-esthetics
#20
M Humagain, D Rokaya, R Srii, S Dixit, D Kafle
Background The size, proportion and gingival zenith position of maxillary anterior teeth plays in the anterior teeth esthetics. Objective To compare the gingival zenith positions and levels between male and female in right and left side as an esthetic parameter. Method Impression of the maxillary arch was made in each participant with irreversible hydrocolloid, and dental cast was made with dental stone type IV. Two clinical parameters were evaluated: (1) the gingival zenith position (GZP) from the vertical bisected midline along the long axis of each individual maxillary anterior tooth; and (2) the gingival zenith level (GZL) of the lateral incisors in an apical-coronal direction relative to the gingival line joining the tangents of the GZP of the adjacent central incisor and canine teeth under healthy conditions...
April 2016: Kathmandu University Medical Journal (KUMJ)
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