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https://www.readbyqxmd.com/read/29905742/precise-calibration-of-spatial-phase-response-nonuniformity-arising-in-liquid-crystal-on-silicon
#1
Jingquan Xu, SiYi Qin, Chen Liu, Songnian Fu, Deming Liu
In order to calibrate the spatial phase response nonuniformity of liquid crystal on silicon (LCoS), we propose to use a Twyman-Green interferometer to characterize the wavefront distortion, due to the inherent curvature of the device. During the characterization, both the residual carrier frequency introduced by the Fourier transform evaluation method and the lens aberration are error sources. For the tilted phase error introduced by residual carrier frequency, the least mean square fitting method is used to obtain the tilted phase error...
June 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29900912/evaluation-of-periodontal-response-to-nonsurgical-therapy-in-pre-and-post-menopausal-women-with-periodontitis
#2
Chinta Sumadhura, Jammula Surya Prasanna, Chinta Sindhura, Parupalli Karunakar
Context: : The influence of sex steroid hormones on periodontium can be lowered with good plaque control. Aims: The aim of the present study was to evaluate periodontal status in pre- and post-menopausal women with periodontitis following nonsurgical therapy. Settings and Design: Interventional pre-post clinical trial. Subjects and Methods: Periodontal status was measured by periodontal index (PRI), and oral hygiene status was measured by plaque index (PI)...
May 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29896060/high-stereographic-resolution-texture-and-residual-stress-evaluation-using-time-of-flight-neutron-diffraction
#3
Pingguang Xu, Stefanus Harjo, Mayumi Ojima, Hiroshi Suzuki, Takayoshi Ito, Wu Gong, Sven C Vogel, Junya Inoue, Yo Tomota, Kazuya Aizawa, Koichi Akita
Neutron diffraction texture measurements provide bulk averaged textures with excellent grain orientation statistics, even for large-grained materials, owing to the probed volume being of the order of 1 cm3 . Furthermore, crystallographic parameters and other valuable microstructure information such as phase fraction, coherent crystallite size, root-mean-square microstrain, macroscopic or intergranular strain and stress, etc. can be derived from neutron diffractograms. A procedure for combined high stereographic resolution texture and residual stress evaluation was established on the pulsed-neutron-source-based engineering materials diffractometer TAKUMI at the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Center, through division of the neutron detector panel regions...
June 1, 2018: Journal of Applied Crystallography
https://www.readbyqxmd.com/read/29892533/comparative-evaluation-of-efficacy-of-emla-and-needleless-jet-anesthesia-in-non-surgical-periodontal-therapy
#4
Rajan Gupta, Satwinder Kaur, Parveen Dahiya, Mukesh Kumar
The treatment of periodontitis primarily consists of mechanical debridement carried out by means of thorough scaling and root planing that might sometimes be a painful procedure which requires the administration of some form of local anesthesia. The present study comparatively evaluates the anesthetic effect of three such forms, viz; eutectic mixture of 25 mg/g lignocaine plus 25 mg/g prilocaine (EMLA) and needleless jet anesthesia during SRP. 30 patients with probing depth of 5 mm or more and visual analog scale (VAS) score of ≥30 mm on probing were selected and asked to assess the pain by VAS and verbal rating scale (VRS) during SRP after application of the two agents...
May 2018: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29889983/a-model-based-tracking-method-for-measuring-3-d-dynamic-joint-motion-using-an-alternating-biplane-x-ray-imaging-system
#5
Cheng-Chung Lin, Jia-Da Li, Tung-Wu Lu, Mei-Ying Kuo, Chien-Chun Kuo, Horng-Chuang Hsu
PURPOSES: To propose a new model-based tracking method for measuring 3-D dynamic joint kinematics using a clinical alternating biplane x-ray imaging system; and to quantify in vitro its errors in measuring ankle and knee motions at different motion speeds. METHODS: A new model-based tracking method based on motion component partition and interpolation (MCPI) was developed for measuring 3-D dynamic joint kinematics based on a clinical alternating biplane x-ray imaging system...
June 11, 2018: Medical Physics
https://www.readbyqxmd.com/read/29887871/remotely-estimating-aerial-n-uptake-in-winter-wheat-using-red-edge-area-index-from-multi-angular-hyperspectral-data
#6
Bin-Bin Guo, Yun-Ji Zhu, Wei Feng, Li He, Ya-Peng Wu, Yi Zhou, Xing-Xu Ren, Ying Ma
Remote sensing techniques can be efficient for non-destructive, rapid detection of wheat nitrogen (N) nutrient status. In the paper, we examined the relationships of canopy multi-angular data with aerial N uptake of winter wheat ( Triticum aestivum L.) across different growing seasons, locations, years, wheat varieties, and N application rates. Seventeen vegetation indices (VIs) selected from the literature were measured for the stability in estimating aerial N uptake of wheat under 13 view zenith angles (VZAs) in the solar principal plane (SPP)...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29875556/the-relevance-of-root-s-convergence-with-trauma-from-occlusion
#7
Wita Anggraini, Sri Lelyati C Masulili, Robert Lessang
Background: The relevance of root's convergence with trauma from occlusion has not been widely studied. Anatomically, alveolar bone support can be divided into several levels. The root which is convergent gives a critical mass of alveolar bone support to the teeth so that it is inadequate to stabilize the tooth. Aims: The purpose of the study is to observe the relevance of root's convergence with traumatic from occlusion. Settings and Design: This was an observational retrospective design...
April 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29874691/oblique-sagittal-images-prevent-underestimation-of-the-neuroforaminal-stenosis-grade-caused-by-disc-herniation-in-cervical-spine-mri
#8
Laurent Kintzelé, Christoph Rehnitz, Hans-Ulrich Kauczor, Marc-André Weber
PURPOSE:  To identify whether standard sagittal MRI images result in underestimation of the neuroforaminal stenosis grade compared to oblique sagittal MRI images in patients with cervical spine disc herniation. MATERIALS AND METHODS:  74 patients with a total of 104 cervical disc herniations compromising the corresponding nerve root were evaluated. Neuroforaminal stenosis grades were evaluated in standard and oblique sagittal images by one senior and one resident radiologist experienced in musculoskeletal imaging...
June 6, 2018: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/29873864/periodontal-therapy-and-endothelial-function-in-coronary-artery-disease-a-randomized-controlled-trial
#9
Marco Aurelio L Saffi, Eneida R Rabelo-Silva, Carisi A Polanczyk, Mariana V Furtado, Marlon M Montenegro, Ingrid W J Ribeiro, Cassio Kampits, Cassiano K Rösing, Alex N Haas
OBJECTIVE: To assess the effects of periodontal treatment on endothelial function in patients with coronary artery disease. MATERIALS AND METHODS: A randomized controlled trial was conducted with 69 patients with stable coronary disease and severe periodontitis. The test group received non-surgical periodontal therapy consisting of personalized oral hygiene instructions, subgingival scaling and root planing per quadrant, whereas the control group received equal treatment after the study period...
June 6, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29869759/semi-automatic-ct-angiography-based-evaluation-of-the-aortic-annulus-in-patients-prior-to-tavr-interchangeability-with-manual-measurements
#10
Dominik Zinsser, Alena B Baumann, Katharina Stella Winter, Fabian Bamberg, Philipp Lange, Konstantin Nikolaou, Maximilian Reiser, Christian Kupatt, Thomas Kröncke, Florian Schwarz
To compare a semi-automatic software tool for the measurement of aortic annulus dimensions with manual measurements by expert readers and to analyze whether and to what extent interchangeability exists between semi-automatic and manual measurements. We retrospectively included 374 consecutive patients with high-grade aortic stenosis who had undergone CT-angiography of the heart prior to trans-catheter aortic valve replacement (TAVR). In independent analyses, two expert readers manually measured aortic annulus dimensions (long axis, short axis, circumference, area) as well as the distance of the coronary ostia from the annulus plane...
June 5, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29866408/influence-of-tooth-orientation-on-the-detection-of-vertical-root-fracture-in-cone-beam-computed-tomography
#11
Victor Aquino Wanderley, Deborah Queiroz Freitas, Francisco Haiter-Neto, Matheus Lima Oliveira
INTRODUCTION: The purpose of this study was to assess the influence of tooth orientation in relation to the projection plane of the x-rays on the detection of vertical root fracture (VRF) with different filling materials using cone-beam computed tomographic (CBCT) imaging. METHODS: Thirty single-rooted human teeth were endodontically instrumented, and VRF was induced in half of the sample. The roots were individually placed in the dental socket of a phantom head composed of a dry human skull and mandible, and CBCT images were obtained of each root with the longitudinal axis in 2 orientations: perpendicular and parallel to the projection plane of the x-rays...
June 1, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29863310/how-effective-is-adjunctive-antimicrobial-photodynamic-therapy-in-treating-deep-periodontal-pockets-in-periodontal-disease-a-systematic-review
#12
REVIEW
Zohaib Akram
The aim of the present systematic review was to evaluate the efficacy of antimicrobial photodynamic therapy (aPDT) that is used as an adjunctive therapy with scaling and root planing (SRP) in deep periodontal pockets (≥5 mm). The addressed Patients, Intervention, Comparators, Outcomes, and Study design question was: In patients with advanced periodontitis (population), what is the effect of aPDT as adjunct to SRP (intervention) in comparison to SRP alone (comparison) on deep probing depths (outcome)? Electronic and manual literature searches were conducted using the following databases: MEDLINE, Embase, Cochrane Central Register of Controlled Trials, and Cochrane Oral Health Group Trials Register, up to and including February 2018...
June 4, 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29858876/locally-delivered-metformin-as-adjunct-to-scaling-and-root-planing-in-the-treatment-of-periodontal-defects-a-systematic-review-and-meta-analysis
#13
REVIEW
Z Akram, F Vohra, F Javed
This study aimed to evaluate the efficacy of metformin as an adjunct to scaling and root planing (SRP) in the treatment of chronic periodontitis. Electronic searches were conducted in databases (MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials and Cochrane Oral Health Group Trials Register databases) up to August 2017. Randomized clinical trials with data in comparison between adjunctive locally delivered metformin use to SRP and placebo in each group and a follow-up period of at least 6 months, were included...
June 2, 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29843730/the-effect-of-inlet-and-outlet-boundary-conditions-in-image-based-cfd-modeling-of-aortic-flow
#14
Sudharsan Madhavan, Erica M Cherry Kemmerling
BACKGROUND: Computational modeling of cardiovascular flow is a growing and useful field, but such simulations usually require the researcher to guess the flow's inlet and outlet conditions since they are difficult and expensive to measure. It is critical to determine the amount of uncertainty introduced by these assumptions in order to evaluate the degree to which cardiovascular flow simulations are accurate. Our work begins to address this question by examining the sensitivity of flow to several different assumed velocity inlet and outlet conditions in a patient-specific aorta model...
May 30, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29807962/effect-of-0-8-hyaluronic-acid-in-conventional-treatment-of-moderate-to-severe-chronic-periodontitis
#15
Nour M Al-Shammari, Sanaa M Shafshak, Mohamed S Ali
OBJECTIVE: The aim of this study is to evaluate the effect of the subgingival application of 0.8% hyaluronic acid (HA) gel (GENGIGEL®) as an adjunct to scaling and root planing (SRP) on clinical parameters and expression of human beta defensin-2 (hBD-2) in patients with moderate to severe chronic periodontitis. MATERIALS AND METHODS: In this randomized, split mouth design study, 24 participants with moderate to severe chronic periodontitis were evaluated after full mouth SRP...
May 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29797436/effects-of-different-periodontal-treatments-in-changing-the-prevalence-and-levels-of-archaea-present-in-the-subgingival-biofilm-of-subjects-with-periodontitis-a-secondary-analysis-from-a-randomized-controlled-clinical-trial
#16
F S Ramiro, Eag de Lira, Gms Soares, B Retamal-Valdes, M Feres, L C Figueiredo, M Faveri
OBJECTIVE: The aim of this randomized double-blind and placebo-controlled study was to assess if periodontal treatment with or without systemic antibiotic would change the mean level of Archaea. METHODS: Fifty-nine (59) subjects were randomly assigned to receive scaling and root planing (SRP) alone or combined with metronidazole (MTZ; 400 mg/TID) or either with MTZ and amoxicillin (AMX; 500 mg/TID) for 14 days. Clinical and microbiological examinations were performed at baseline and at 6 months post-SRP...
May 23, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29795969/clinical-effects-of-photodynamic-therapy-as-an-adjunct-to-full-mouth-ultrasonic-scaling-and-root-planing-in-treatment-of-chronic-periodontitis
#17
Pitchanun Bundidpun, Rungtiwa Srisuwantha, Narongsak Laosrisin
Background and aims: Photodynamic therapy (PDT) is a potential strategy to eliminate infection in the specific tissue. It uses lower-power laser to activate a photosensitizing agent. Studies have shown the benefit of PDT in the periodontal treatment. The aim of this study was to evaluate the periodontal changes after applying PDT as an adjunct to one visit full-mouth SRP (scaling and root planing) with subgingival piezoelectric ultrasonic scaler compared with full-mouth SRP alone. Methods: A split-mouth randomized clinical trial was designed...
March 31, 2018: Laser Therapy
https://www.readbyqxmd.com/read/29794398/in-vitro-and-clinical-evaluation-of-optical-coherence-tomography-for-the-detection-of-subgingival-calculus-and-root-cementum
#18
Masaki Tsubokawa, Akira Aoki, Sho Kakizaki, Yoichi Taniguchi, Kenichiro Ejiri, Koji Mizutani, Geena Koshy, Tatsuya Akizuki, Shigeru Oda, Yasunori Sumi, Yuichi Izumi
This study evaluated the effectiveness of swept-source optical coherence tomography (ss-OCT) for detecting calculus and root cementum during periodontal therapy. Optical coherence tomography (OCT) images were taken before and after removal of subgingival calculus from extracted teeth and compared with non-decalcified histological sections. Porcine gingival sheets of various thicknesses were applied to the root surfaces of extracted teeth with calculus and OCT images were taken. OCT images were also taken before and after scaling and root planing (SRP) in human patients...
May 24, 2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29791378/design-of-an-adjustable-bipod-flexure-for-a-large-aperture-mirror-of-a-space-camera
#19
Bei Liu, Wei Wang, Yan-Jun Qu, Xu-Peng Li, Xiao Wang, Hui Zhao
An adjustable bipod flexure (ABF) technique for a large-aperture mirror of a space camera is presented. The proposed flexure mount can decrease the surface distortions caused by the machining error and the assembly error of the mirror assembly (MA) in a horizontal optical testing layout. Through the analysis of the compliance matrix of conventional bipod flexure, the positional relationship between the rotation center and the apex of the flexure is investigated. Then, the principle of the adjustable flexure, known as the trapezoidal switching principle, is proposed based on the analysis result...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29788139/microsurgical-resection-of-spinal-cord-hemangioblastoma-2-dimensional-operative-video
#20
Mirza Pojskic, Kenan I Arnautovic
This video demonstrates microsurgical resection of spinal cord hemangioblastoma. Hemangioblastomas are rare, benign, highly vascularized tumors classified as grade I according to World Health Organization classification systems. About 3% of all intramedullary tumors are hemangioblastomas.1,2 Spinal cord hemangioblastomas are either sporadic3,4 or manifestations of von Hippel-Lindau (VHL) disease in 20% to 45% of patients.5,6 A 30-year-old male presented with sudden onset urinary incontinence. Magnetic resonance imaging showed contrast enhancing intramedullary tumor with adjacent cyst in T11, and syringomyelia extending to C1...
May 18, 2018: Operative Neurosurgery (Hagerstown, Md.)
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