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https://www.readbyqxmd.com/read/28645179/system-wide-analysis-of-short-term-response-to-high-temperature-in-pinus-radiata
#1
Mónica Escandón, Luis Valledor, Jesús Pascual, Gloria Pinto, María Jesús Cañal, Mónica Meijón
Pinus radiata seedlings, the most widely planted pine species in the world, were exposed to temperatures within a range mimicking future scenarios based on current models of heat increase. The short-term heat response in P. radiata was studied in detail by exploring the metabolome, proteome and targeted transcriptome. The use of complementary mass spectrometry techniques, GC-MS and LC-Orbitrap-MS, together with novel bioinformatics tools allowed the reliable quantification of 2,075 metabolites and 901 protein groups...
June 22, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28645010/a-rare-case-of-male-pseudohermaphroditism-persistent-mullerian-duct-syndrome-with-transverse-testicular-ectopia-case-report-and-review-of-literature
#2
Aashish Rajesh, Mohammed Farooq
INTRODUCTION: Persistent Mullerian duct syndrome (PMDS) is a rare type of male pseudohermaphroditism. Transverse testicular ectopia (TTE) is characterized by one testis moving to the opposite side and both testes traversing the same inguinal canal. CASE PRESENTATION: An 11-month-old boy presented with bilateral cryptorchidism. The left testis was not palpable; the right testis was canalicular with a right inguinal hernia. Ultrasound showed both testes located in the right inguinal canal...
June 15, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28644564/methacrylate-based-root-canal-sealer-containing-chlorexidine-and-%C3%AE-tricalcium-phosphate
#3
Fabrício Mezzomo Collares, Vicente Castelo Branco Leitune, Fernando Freitas Portella, Paula Dapper Santos, Gabriela de Souza Balbinot, Luís Alberto Dos Santos, Clarissa Cavalcanti Fatturi Parolo, Susana Maria Werner Samuel
The aim of this study was to develop and to characterize a methacrylate-based root canal sealer containing chlorhexidine (CHX) and α-tricalcium phosphate (α-TCP). Experimental dual cure methacrylate-based sealer was produced containing 0, 2.5, or 5 wt% of CHX and 0, 25, or 50 wt% of α-TCP. Experimental sealers were evaluated based on flow, film thickness, radiopacity, degree of conversion (DC), degradation in water, pH and antibacterial activity. Flow ranged from 15.09 ± 0.11 to 17.47 ± 0.42 mm...
June 23, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28644527/an-audit-on-technical-quality-of-root-fillings-performed-by-undergraduate-students
#4
W Fong, O Heidarifar, S Killough, M Lappin, I A El Karim
AIM: To evaluate radiographically the technical quality of root fillings performed by undergraduate dental students and to assess whether students were exposed to an appropriate endodontic case mix during their clinical training. METHODOLOGY: A retrospective audit was undertaken evaluating the clinical records of patients who underwent endodontic procedures during the period from September 2015 to June 2016 in the Dental School at Queen's University Belfast, UK...
June 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28644431/an-in-vitro-study-on-the-efficacy-of-removing-calcium-hydroxide-from-curved-root-canal-systems-in-root-canal-therapy
#5
Ying Wang, Li-Yang Guo, Hong-Zhi Fang, Wen-Ling Zou, Ying-Ming Yang, Yuan Gao, Hui Yang, Tao Hu
To compare the efficacy of various irrigants (citric acid, ethylenediaminetetraacetic acid (EDTA) and NaOCl) and techniques in removing Ca(OH)2 in two types of curved root canal systems, simulated root canals with specific curvatures were used to investigate the effects of different irrigants and instruments on Ca(OH)2 removal. The optimal methods were verified on extracted human teeth. Simulated root canals were assigned to one of two groups based on the irrigation solution: 10% citric acid or 2.5% NaOCl. Each group was divided into four subgroups according to the technique used to remove Ca(OH)2...
June 23, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28643935/efficacy-of-self-adjusting-file-xp-endo-finisher-and-passive-ultrasonic-irrigation-on-the-removal-of-calcium-hydroxide-paste-from-an-artificial-standardized-groove
#6
Anda Kfir, Nuphar Blau-Venezia, Tomer Goldberger, Itzhak Abramovitz, Ronald Wigler
The purpose of this study was to compare the effectiveness of self-adjusting file (SAF), XP-endo finisher (XP), passive ultrasonic irrigation (PUI) and conventional syringe and needle irrigation (SNI) in the removal of Ca(OH)2 from an artificial groove. Eighty mandibular incisors with single oval canals were prepared to size 40/0.04 and split longitudinally. A standardised groove was prepared in the apical third and filled with Ca(OH)2 . The root halves were reassembled and divided into two control groups (n = 4) and four experimental groups (n = 18) according to the removal methods used...
June 23, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28643534/transplantation-of-mouse-induced-pluripotent-stem-cells-into-the-cochlea-for-the-treatment-of-sensorineural-hearing-loss
#7
Jing Chen, Lina Guan, Hengtao Zhu, Shan Xiong, Liang Zeng, Hongqun Jiang
CONCLUSION: Mouse-induced pluripotent stem cells (iPSCs) could differentiate into hair cell-like cells and spiral ganglion-like cells after transplantation into mouse cochleae, but it cannot improve the auditory brain response (ABR) thresholds in short term. OBJECTIVE: To evaluate the potential of iPSCs for use as a source of transplants for the treatment of sensorineural hearing loss (SNHL). METHODS: Establishing SNHL mice model, then injecting the iPSCs or equal volume DMEM basic medium into the cochleae, respectively...
June 23, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28643401/novel-navigation-technique-for-the-endodontic-treatment-of-a-molar-with-pulp-canal-calcification-and-apical-pathology
#8
Xilin Shi, Shiyong Zhao, Weidong Wang, Qianzhou Jiang, Xuechao Yang
Apical periodontitis, the inflammation of periapical tissue, commonly requires root canal treatment to achieve apical healing. However, if it is accompanied by pulp canal calcification, the treatment becomes complicated, and locating the root canal can be challenging. This case report describes a novel approach for treating a molar with pulp canal calcification and apical pathology. Due to the risk of perforation during treatment, a digitally printed template was used to assist in accurately locating the root canal...
June 23, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28643340/trans-endoscopic-diode-laser-fenestration-of-equine-conchae-via-contralateral-nostril-approach
#9
Filip Kološ, Štěpán Bodeček, Zdeněk Žert
OBJECTIVE: To describe and report preliminary outcomes of a contralateral trans-nasal endoscopic laser fenestration of the conchae for endoscopic examination and treatment of paranasal sinuses in horses. STUDY DESIGN: Cadaveric experimental and prospective clinical study. ANIMALS: Normal cadaveric equine heads (n = 7) and equine patients (horses n = 7, donkey n = 1) diagnosed with sinusitis. METHODS: Ex vivo: a video-endoscope containing a diode laser fiber in the working canal was passed through the nostril and retroflexed in the nasopharynx toward the contralateral conchae...
June 23, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28643130/retreatability-of-three-calcium-silicate-containing-sealers-and-one-epoxy-resin-based-root-canal-sealer-with-four-different-root-canal-instruments
#10
David Donnermeyer, Clarissa Bunne, Edgar Schäfer, Till Dammaschke
OBJECTIVES: The objective of the study was to compare the retreatability of three calcium silicate-containing sealers (BioRoot RCS, MTA Fillapex, Endo C.P.M.) and an epoxy resin-based sealer (AH Plus) with different root canal instruments (Hedström files, Reciproc R40, Mtwo retreatment file R 25/.05 + Mtwo 40/.06, and F6 SkyTaper) concerning sealer remnants and retreatment time. MATERIALS AND METHODS: Root canals of 192 teeth were instrumented with Reciproc R40...
June 22, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28642911/a-retrospective-multicenter-study-comparing-metal-ceramic-and-composite-single-crowns-performed-in-public-general-dentistry-5-year-results
#11
Jennie Overmeer, Birger Narby, Lars Hjalmarsson, Kristina Arnrup, Alf Eliasson
Objective The aim of this study was to evaluate and compare the 5-year survival and complication rate of metal-ceramic (MC) and composite single crowns performed within Public Dental Service, general dentistry, in three Swedish counties and with patients' gender, tooth position, root canal treatment and the presence of a post-and-core taken into account. Methods Data were collected from dental records of 600 patients who had received either an MC (n = 300) or a composite (n = 300) crown on a premolar or molar tooth in the year 2005 and where 5 years of follow-up data were available...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642654/quantitative-evaluation-of-experimental-bone-regeneration-using-indentation-tests
#12
Valéria Trombini Vidotto, Nilza Alzira Batista, José Ricardo Lenzi Mariolani, William Dias Belangero
OBJECTIVES: To determine whether the macroindentation test can be applied to quantitatively assess bone regeneration. METHODS: A 3.2 mm diameter transverse monocortical defect was created on the medial aspect of both proximal metaphyses of the tibia of male Unib-WH rats. For the macroindentation tests, we used 5.00 mm diameter indenters with a 3.2 mm tip. Defect testing was performed 1 to 12 weeks following the surgical procedures to compare the hardness of the newly developed tissue over the 12-week study period...
March 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28642563/root-canal-treatment-outcomes-not-affected-by-increasing-age-of-patient
#13
Y Jo Wong
Data sourcesMedline, Cochrane CENTRAL databases; most recent two years of seven journals: (Acta Odontologica Scandinavica; Community Dentistry and Oral Epidemiology; Gerodontology; International Endodontic Journal; Journal of Endodontics; Journal of Oral Rehabilitation; and Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology).Study selectionTooth-based longitudinal prospective and retrospective studies, published in English from January 1950 to August 2013, assessing outcomes of NSRCT in adults with permanent teeth...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28642431/quantum-and-isotope-effects-in-lithium-metal
#14
Graeme J Ackland, Mihindra Dunuwille, Miguel Martinez-Canales, Ingo Loa, Rong Zhang, Stanislav Sinogeikin, Weizhao Cai, Shanti Deemyad
The crystal structure of elements at zero pressure and temperature is the most fundamental information in condensed matter physics. For decades it has been believed that lithium, the simplest metallic element, has a complicated ground-state crystal structure. Using synchrotron x-ray diffraction in diamond anvil cells and multiscale simulations with density functional theory and molecular dynamics, we show that the previously accepted martensitic ground state is metastable. The actual ground state is face-centered cubic (fcc)...
June 23, 2017: Science
https://www.readbyqxmd.com/read/28642058/ex-vivo-investigation-on-the-postoperative-integrity-of-the-apical-constriction-after-the-sole-use-of-electronic-working-length-determination
#15
Michael Wolgin, Markus J Grundmann, Jörg P Tchorz, Wilhelm Frank, Andrej M Kielbassa
AIM: The present study investigated the accuracy of root canal preparation with regard to the integrity of the apical constriction (AC) using two different working length determination approaches: (1) the electronic method of working length determination (EWLD), and (2) the radiologic "gold standard" method (GS). METHODOLOGY: Simulation models were constructed by arranging extracted human teeth by means of silicon bolstered gingiva masks, along with a conductive medium (alginate)...
June 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28642015/convergent-and-unidirectional-evolution-of-extremely-long-aedeagi-in-the-largest-feather-mite-genus-proctophyllodes-acari-proctophyllodidae-evidence-from-comparative-molecular-and-morphological-phylogenetics
#16
Pavel B Klimov, Sergey V Mironov, Barry M OConnor
Proctophyllodid feather mites (400+ species) are permanent (full-time) symbionts commonly occurring on passerine birds. Phenotypic evolution of these mites appears to be greatly influenced by characters related to reproduction (>87.5% of a total of 32 taxonomically important discrete characters) and male genitalic characters (21.9%). Because sexual selection could the major evolutionary driver in this system, we test the theoretical expectation that genitalic or sexually dimorphic characters should evolve more rapidly and divergently then other characters...
June 19, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28641325/superior-canal-dehiscence-syndrome-associated-with-scuba-diving
#17
Naoharu Kitajima, Akemi Sugita-Kitajima, Seiji Kitajima
A 28-year-old female diver presented with dizziness and difficulty clearing her left ear whilst scuba diving. Her pure-tone audiometry and tympanometry were normal. Testing of Eustachian tube function revealed tubal stenosis. Video-oculography revealed a predominantly torsional nystagmus while the patient was in the lordotic position. Fistula signs were positive. High-resolution computed tomography (HRCT) of the temporal bone revealed a diagnosis of bilateral superior semicircular canal dehiscence (SCDS). Cervical vestibular-evoked myogenic potential (cVEMP) testing showed that the amplitude of the cVEMP measured from her left ear was larger than that from the right...
June 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28641190/synchronous-mucinous-adenocarcinoma-of-the-recto-sigmoid-revealed-by-and-seeding-an-anal-fistula-a-case-report-and-review-of-the-literature
#18
Konstadinos G Spiridakis, Elefterios E Sfakianakis, Manthos E Flamourakis, Dimitra S Intzepogazoglou, Eleni S Tsagataki, Nikolaos E Ximeris, Efstathios K Rachmanis, Ioannis G Gionis, Giorgos E Kostakis, Manousos S Christodoulakis
INTRODUCTION: There are few cases of synchronous rectal adenocarcinoma revealed by an anal fistula. The diagnosis of synchronous mucinous adenocarcinoma of the recto sigmoid and anal canal remains difficult. The chronic anal fistula can be mistaken as the common manifestation of a benign perianal abscess or fistula. CASE PRESENTATION: We present a rare case of a Greek Caucasian 79year old male patient with anal fistula and a recurrent perianal abscess who subsequently was found to have developed synchronous rectosigmoid and perianal mucinous adenocarcinoma on biopsy...
June 8, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28640842/living-in-the-waterfalls-a-new-species-of-trichomycterus-siluriformes-trichomycteridae-from-tabay-stream-misiones-argentina
#19
Guillermo Enrique Terán, Juliano Ferrer, Mauricio Benitez, Felipe Alonso, Gastón Aguilera, Juan Marcos Mirande
A new species assigned to the genus Trichomycterus from the area of the waterfalls of Tabay stream, Paraná River basin, Misiones, Argentina, is described. Trichomycterus ytororo sp. nov. is distinguished from all other species in the genus by the presence of 31-35 dorsal procurrent caudal-fin rays and the combination of some external characters such as: coloration, number of pectoral-fin rays and pores of the laterosensory canals. The new taxon belongs to a presumably monophyletic group of species composed of T...
2017: PloS One
https://www.readbyqxmd.com/read/28640396/an-anatomical-study-of-plate-rod-fixation-in-feline-tibiae
#20
Andreas Gutbrod, Simona Vincenti, Karolin Kühn, Sebastian Christoph Knell, Philipp Alexander Schmierer, Antonio Pozzi
OBJECTIVE: To investigate the feasibility of placing bi-cortical cortex (B-cort) or mono-cortical locking screws (M-lock) in a plate-rod construct applied to the feline tibia in combination with different intramedullary (IM) pins. METHODS: Twenty-four feline tibiae of cats were divided into 4 groups, corresponding to IM pin sizes filling approximately 30% (1.0 mm), 40% (1.4 mm), 45% (1.6 mm), and 50% (1.8 mm) of the medullary canal. Computed tomography (CT) was performed to trace potential screw trajectories in each group...
June 22, 2017: Veterinary Surgery: VS
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