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https://www.readbyqxmd.com/read/29045279/leaflet-kinematics-of-mechanical-and-bioprosthetic-aortic-valve-prostheses
#1
Bernhard Vennemann, Thomas Rösgen, Paul Philipp Heinisch, Dominik Obrist
The hemodynamic performance of artificial aortic valves (AVs) and the probability for structural valve deterioration can be linked to the valve kinematics. Comparability among different studies is limited because of variations in the experimental setups and physiologic boundary conditions. This study presents results of kinematic measurements of bioprosthetic and mechanical AVs that were tested in an identical experimental setting such that they can be directly compared with each other. The kinematics of AVs is typically presented in the form of the geometric orifice area and its temporal evolution...
October 18, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29042730/a-comparative-scanning-electron-microscopic-analysis-of-the-effect-of-qmix-%C3%A2-and-sofscale-%C3%A2-as-an-adjunct-to-scaling-and-root-planing-on-periodontally-compromised-root-surfaces-an-in-vitro-study
#2
Abhay A Nawathe, Neeraj C Deshpande, Shivani A Dandekar
AIM: This study aimed to comparatively analyze, under scanning electron microscope (SEM), the effect of the use of QMix(®) and SofScale(™) as an adjunct to scaling and root planing (SRP) on periodontally compromised root surfaces. SETTINGS AND DESIGN: This study was carried out in K. M. Shah Dental College and Hospital, Vadodara. METHODOLOGY: This was a single-blinded in vitro study which compared QMix(®) and SofScale(™) as an adjunct to SRP on periodontally compromised root surfaces under SEM...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29041614/fast-two-snapshot-structured-illumination-for-temporal-focusing-microscopy-with-enhanced-axial-resolution
#3
Yunlong Meng, Wei Lin, Chenglin Li, Shih-Chi Chen
We present a new two-snapshot structured light illumination (SLI) reconstruction algorithm for fast image acquisition. The new algorithm, which only requires two mutually π phase-shifted raw structured images, is implemented on a custom-built temporal focusing fluorescence microscope (TFFM) to enhance its axial resolution via a digital micromirror device (DMD). First, the orientation of the modulated sinusoidal fringe patterns is automatically identified via spatial frequency vector detection. Subsequently, the modulated in-focal-plane images are obtained via rotation and subtraction...
September 18, 2017: Optics Express
https://www.readbyqxmd.com/read/29036152/single-freeform-surface-design-for-prescribed-input-wavefront-and-target-irradiance
#4
Christoph Bösel, Herbert Gross
In beam shaping applications, the minimization of the number of necessary optical elements for the beam shaping process can benefit the compactness of the optical system and reduce its cost. The single freeform surface design for input wavefronts, which are neither planar nor spherical, is therefore of interest. In this work, the design of single freeform surfaces for a given zero-étendue source and complex target irradiances is investigated. Hence, not only collimated input beams or point sources are assumed...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29033530/orthodontic-management-of-a-dilacerated-central-incisor-and-partially-impacted-canine-with-unilateral-extraction-a-case-report
#5
A Sumathi Felicita
AIM: To align a dilacerated maxillary central incisor and partially impacted canine with unilateral extraction in a young patient with skeletal deep bite. MATERIALS AND METHODS: A 14 year old male patient reported to the hospital with skeletal deep bite (basal plane angle-17°), severe horizontal pattern of growth (Go-Gn to Sn -22°), upright maxillary incisors (U1 to NA -26°) and retroclined lower incisors (L1 to NB -11°). The maxillary left central incisor was dilacerated, and the maxillary left canine was partially impacted...
October 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/29033084/morphological-characteristics-and-classification-of-mandibular-first-molars-having-2-distal-roots-or-canals-3-dimensional-biometric-analysis-using-cone-beam-computed-tomography-in-a-korean-population
#6
Yemi Kim, Byoung-Duck Roh, Yooseok Shin, Bom Sahn Kim, Yoo-Lim Choi, Aena Ha
INTRODUCTION: The aim of this study was to determine the morphologic characteristics of mandibular first molars having 2 canals in distal roots. Interorifice distance, buccal bone thickness, and root curvature were evaluated using cone-beam computed tomography images in a Korean population. METHODS: In total, 1958 mandibular first molars were evaluated in axial, coronal, sagittal, and paraxial planes. Distal roots having 2 canals were classified according to their root and canal shapes (2 roots, 2 canals [2R2C]; 1 root, 2 canals with 2 apical foramina [1R2C(2-2)]; and 1 root, 2 canals with 1 apical foramen [1R2C(2-1)])...
October 12, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29033081/a-cone-beam-computed-tomographic-study-of-apical-surgery-related-morphological-characteristics-of-the-distolingual-root-in-3-rooted-mandibular-first-molars-in-a-chinese-population
#7
Xiao Zhang, Ning Xu, Hanguo Wang, Qing Yu
INTRODUCTION: Apical surgery on the separate distolingual (DL) root of a 3-rooted mandibular first molar is thought to be difficult because DL roots are always severely curved, small, and shorter than distobuccal (DB) roots, and they are located far from the buccal cortical bone. The purpose of this study was to use cone-beam computed tomographic images to investigate the apical surgery-related morphological characteristics of DL roots in a Chinese population. METHODS: The screening process identified 83 subjects with 128 mandibular first molars with separate DL roots...
October 12, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29031529/enhanced-surgical-outcomes-in-patients-with-skeletal-class-iii-facial-asymmetry-by-3-dimensional-surgical-simulation
#8
Ellen Wen-Ching Ko, Cheng-Hui Lin, Ying-An Chen, Yu-Ray Chen
PURPOSE: With the advance of image fusion techniques, the creation of 3-dimensional (3D) virtual head and 3D surgical simulations has provided previews of surgical procedures. The aim of this study was to investigate the surgical outcomes in patients receiving orthognathic surgery (OGS) with the guidance of 3D computer-assisted surgical simulation. PATIENTS AND METHODS: The study included 34 consecutive patients (15 men and 19 women; age, 18.1 to 33.0 yr) with skeletal Class III facial asymmetry who underwent bimaxillary OGS...
September 19, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29030983/woody-plant-encroachment-amplifies-spatial-heterogeneity-of-soil-phosphorus-to-considerable-depth
#9
Yong Zhou, Thomas W Boutton, X Ben Wu
The geographically extensive phenomenon of woody plant encroachment into grass-dominated ecosystems has strong potential to influence biogeochemical cycles at ecosystem to global scales. Previous research has focused almost exclusively on quantifying pool sizes and flux rates of soil carbon and nitrogen (N), while few studies have examined the impact of woody encroachment on soil phosphorus (P) cycling. Moreover, little is known regarding the impact of woody encroachment on the depth distribution of soil total P at the landscape scale...
October 14, 2017: Ecology
https://www.readbyqxmd.com/read/29017303/single-stage-posterior-approach-for-total-resection-of-presacral-giant-schwannoma-a-technical-case-report
#10
Byoung Hun Lee, Seung-Jae Hyun, Jong-Hwa Park, Ki-Jeong Kim
The neurogenic tumor of frequent occurrence in the presacral area is a schwannoma. Giant presacral schwannoma has a risk for anterior surgical approach because of its massive size and proximity to abundant vascularity of presacral region. We report a single stage posterior approach for total resection of a giant presacral schwannoma. A 40-year-old female patient experienced left buttock pain and tingling sensation at left S1 dermatome. Magnetic resonance imaging showed that the presacral huge mass at S1-3 level with osseous extension and structural remodeling in left sacral ala...
September 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/29016923/surface-morphology-and-dislocation-characteristics-near-the-surface-of-4h-sic-wafer-using-multi-directional-scanning-transmission-electron-microscopy
#11
Takahiro Sato, Yoshihisa Orai, Yuya Suzuki, Hiroyuki Ito, Toshiyuki Isshiki, Munetoshi Fukui, Kuniyasu Nakamura, C T Schamp
To improve the reliability of silicon carbide (SiC) electronic power devices, the characteristics of various kinds of crystal defects should be precisely understood. Of particular importance is understanding the correlation between the surface morphology and the near surface dislocations. In order to analyze the dislocations near the surface of 4H-SiC wafers, a dislocation analysis protocol has been developed. This protocol consists of the following process: (1) inspection of surface defects using low energy scanning electron microscopy (LESEM), (2) identification of small and shallow etch pits using KOH low temperature etching, (3) classification of etch pits using LESEM, (4) specimen preparation of several hundred nanometer thick sample using the in-situ focused ion beam micro-sampling® technique, (5) crystallographic analysis using the selected diffraction mode of the scanning transmission electron microscope (STEM), and (6) determination of the Burgers vector using multi-directional STEM (MD-STEM)...
October 1, 2017: Microscopy
https://www.readbyqxmd.com/read/28989898/distances-from-the-root-apices-of-posterior-teeth-to-the-maxillary-sinus-and-mandibular-canal-in-patients-with-skeletal-open-bite-a-cone-beam-computed-tomography-study
#12
Werinpimol Kosumarl, Virush Patanaporn, Dhirawat Jotikasthira, Apirum Janhom
PURPOSE: This study determined and compared the distances from the maxillary root apices of posterior teeth to the floor of the maxillary sinus, or maxillary sinus distances (MSDs), and the distances from the mandibular root apices of the posterior teeth to the mandibular canal, or mandibular canal distances (MCDs), in Thai subjects with skeletal open bite and skeletal normal bite. MATERIALS AND METHODS: Pretreatment cone-beam computed tomography (CBCT) images were obtained from 30 Thai orthodontic patients (15 patients with skeletal normal bite and 15 with skeletal open bite) whose ages ranged from 14 to 28 years...
September 2017: Imaging Science in Dentistry
https://www.readbyqxmd.com/read/28980111/neuroprotective-effects-of-curcumin-against-acetamiprid-induced-neurotoxicity-and-oxidative-stress-in-the-developing-male-rat-cerebellum-biochemical-histological-and-behavioral-changes
#13
Ines Bini Dhouib, Alya Annabi, Raoudha Doghri, Ines Rejeb, Yosra Dallagi, Yassin Bdiri, Mohamed Montassar Lasram, Amel Elgaaied, Raja Marrakchi, Saloua Fazaa, Asma Gati
Curcumin is a molecule found in turmeric root that has anti-inflammatory, antioxidant, and anti-tumor properties and has been widely used as both an herbal drug and a food additive to treat or prevent neurodegenerative diseases. This study aimed to investigate the effect of curcumin on neurobehavioral and neuropathological alterations induced by acetamiprid on male rats. Three groups of ten male Wistar rats each were used for the study: the first was a control group (CTR) that did not consume acetamiprid (ACE); the second was an experimental group (ACE) that consumed 40 mg/kg body weight/day of acetamiprid; and the third group (CUR) received curcumin (100 mg/kg) and acetamiprid (40 mg/kg) in combination...
October 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28969284/the-effects-of-imaging-enhancement-tools-in-the-detection-of-horizontal-root-fractures
#14
Mohammed Barayan, Ibrahim Nasseh, Hassem Geha, Marcel Noujeim
INTRODUCTION: Detection of root fracture is challenging both clinically and radiographically. Root fractures occur in different planes with unpredictable presentations. AIM: The aim of the study was to evaluate the diagnostic accuracy of selected digital image enhancement tools in the detection of horizontal Root Fracture (RF). MATERIALS AND METHODS: Fifty three roots, of single and multi-rooted teeth, in eight dentate human cadaver mandibles were selected for this study...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28969239/magnetic-resonance-imaging-in-paediatric-spinal-dysraphism-with-comparative-usefulness-of-various-magnetic-resonance-sequences
#15
Deepakkumar Vinodary Mehta
INTRODUCTION: Spinal dysraphism occurs due to failure of fusion of parts along dorsal aspect of midline structures lying along spinal axis from skin to vertebrae and spinal cord. Congenital spinal anomalies may be minimal and asymptomatic like spinal bifida occulta, or severe with marked neurological deficits like Arnold-Chiari malformation or caudal regression syndrome. Magnetic Resonance Imaging (MRI) is the modality of choice to diagnose mild to severe spinal dysraphism. AIM: To diagnose type and extent of clinically suspected spinal anomalies by MRI scan and to compare various sequences for identifying neural tissue and fatty tissue in anomalies...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28966185/dental-and-dental-hygiene-intraprofessional-education-a-pilot-program-and-assessment-of-students-and-patients-satisfaction
#16
Vickie E Jones, Anastasios Karydis, Timothy L Hottel
Interprofessional and intraprofessional education (when students from two or more professions or within the same profession, respectively, learn about, from, and/or with each other) is crucial for effective interdisciplinary collaboration. The aims of this study were to assess the effectiveness of a clinical intraprofessional education program for dental and dental hygiene students, based on students' expectations and satisfaction with the program and patients' satisfaction with the team-based care. The pilot program was developed at the University of Tennessee Health Science Center College of Dentistry, where dental hygiene students were paired randomly with dental students scheduled for prophylaxis, scaling and root planing, or periodontal maintenance...
October 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28962931/clarithromycin-as-adjunct-to-scaling-and-root-planing-reduces-counts-of-periodontal-pathogens-but-there-is-no-evidence-of-benefits-on-clinical-outcomes-after-6-months
#17
Romina Brignardello-Petersen
No abstract text is available yet for this article.
September 23, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28958630/anatomical-evidence-for-the-anterior-plate-fixation-of-sacroiliac-joint
#18
Zhibiao Bai, Shichang Gao, Jia Liu, Anlin Liang, Weihua Yu
BACKGROUND: The iatrogenic injuries to the lumbar nerves during the fixation the sacroiliac (SI) joint fractures with anterior plates were often reported. No specific method had been reported to avoid it. This study was done to find a safer way of placing the anterior plates and screws for treating the sacroiliac (SI) joint fracture and/or dislocation. METHODS: The research was performed using 8 male and 7 female normal corpse pelvic specimens preserved by 10% formalin solution...
September 25, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28945145/the-effects-of-diode-laser-therapy-as-an-adjunct-to-scaling-and-root-planing-in-the-treatment-of-aggressive-periodontitis-a-1-year-randomized-controlled-clinical-trial
#19
Giovanni Matarese, Luca Ramaglia, Marco Cicciù, Giancarlo Cordasco, Gaetano Isola
OBJECTIVE: The aim of this study was to investigate and compare the clinical, microbial, and inflammatory effects of a diode laser as an adjunct to scaling and root planing (SRP) versus SRP alone for the treatment of generalized aggressive periodontitis (GAgP). METHODS: Using a split-mouth design, 31 patients with GAgP were enrolled in the study. The maxillary right and left quadrants were randomly assigned to SRP+diode laser or SRP alone. Patients were examined on a regular basis for clinical, microbiological, and inflammatory mediator changes over a 1-year period...
September 14, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28944351/the-effect-of-nonsurgical-periodontal-therapy-on-the-level-of-human-neutrophil-peptides-1-3-in-patients-with-aggressive-periodontitis
#20
Ewa Dolińska, Anna Skurska, Violetta Dymicka-Piekarska, Robert Milewski, Jan Pietruski, Małgorzata Pietruska, Anton Sculean
PURPOSE: To assess the presence of HNP1-3 in the gingival crevicular fluid (GCF) of patients suffering from aggressive periodontitis before and after nonsurgical periodontal therapy. MATERIALS AND METHODS: Twenty patients, each with generalised aggressive periodontitis (GAP) were included in the study. After periodontal examination, one site with a probing depth (PD) ≥ 4 mm was selected. Patients received nonsurgical treatment (scaling and root planing [SRP]) with additional administration of systemic antibiotic therapy (amoxicillin 375 mg three times daily + metronidazole 250 mg three times daily for 7 days)...
September 21, 2017: Oral Health & Preventive Dentistry
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