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https://www.readbyqxmd.com/read/28350453/diazaphenoxazines-and-diazaphenothiazines-synthesis-of-the-correct-isomers-reveals-they-are-highly-reactive-radical-trapping%C3%A2-antioxidants
#1
Evan A Haidasz, Derek A Pratt
The preparation of 2,4-diazaphenothiazines and 2,4-diazaphenoxazines via a copper-catalyzed intramolecular amination is described. Literature approaches which utilize easily accessed (2'-aminophenyl) 4-pyri(mi)dyl sulfides undergo a Smiles rearrangement that gives rise to the 1,3-diaza derivatives instead, confirmed by X-ray crystallography. Inversion of the polarity of the cyclization avoids the rearrangement and affords the desired products. Preliminary kinetic studies suggest that 2,4-diazaphenothiazines and diazaphenoxazines, but not the 1,3-diaza isomers, are remarkably potent radical-trapping antioxidants...
March 28, 2017: Organic Letters
https://www.readbyqxmd.com/read/28345818/retraction-predicting-new-ugi-smiles-couplings-a-combined-experimental-and-theoretical-study
#2
Romain Ramozzi, Dr Nicolas Chéron, Laurent El Kaïm, Laurence Grimaud, Paul Fleurat-Lessard
No abstract text is available yet for this article.
March 23, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28341879/intra-articular-findings-in-symptomatic-minor-instability-of-the-lateral-elbow-smile
#3
Paolo Arrigoni, Davide Cucchi, Riccardo D'Ambrosi, Usman Butt, Marc R Safran, Patrick Denard, Pietro Randelli
PURPOSE: Lateral epicondylitis is generally considered an extra-articular condition. The role of minor instability in the aetiology of lateral elbow pain has rarely been considered. The aim of this study was to evaluate the correlation of lateral ligamentous laxity with aspects of intra-articular lateral elbow pathology and investigate the role of minor instability in lateral elbow pain. METHODS: Thirty-five consecutive patients aged between 20 and 60 years with recalcitrant lateral epicondylitis who had failed conservative therapy and had no previous trauma or overt instability, were included...
March 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28339587/incisor-inclination-and-perceived-tooth-colour-changes
#4
Philip Ciucchi, Stavros Kiliaridis
Introduction: Social attractiveness is influenced by a variety of different smile-related factors. We evaluated whether the degree of upper central incisor proclination can result in tooth colour change. Methods: Forty young adult subjects (20-25 years) in good health with a complete sound dentition were selected. The subjects were seated in standardized light conditions with an above-directed light source. Their natural head position was stated as 0 degrees. To mimic the range of possible anterior torque movements they were asked to tilt their heads upward +15 degrees (upward tilting) and downward -15 degrees (downward tilting)...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28337591/arthroscopic-r-lcl-plication-for-symptomatic-minor-instability-of-the-lateral-elbow-smile
#5
Paolo Arrigoni, Davide Cucchi, Riccardo D'Ambrosi, Alessandra Menon, Alberto Aliprandi, Pietro Randelli
PURPOSE: Minor instability has been proposed as a possible aetiology of lateral elbow pain. This study presents the results of the arthroscopic plication of the radial component of the lateral collateral ligament (R-LCL) to reduce minor instability of the lateral elbow. METHODS: Twenty-seven patients with recalcitrant lateral epicondylitis who had failed conservative therapy and who had no previous trauma or overt instability, were included. R-LCL plication was performed in the presence of at least one sign of lateral ligamentous patholaxity and one intra-articular abnormal finding...
March 23, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28337419/smile-esthetics-evaluation-of-long-term-changes-in-the-transverse-dimension
#6
Sercan Akyalcin, Kenner Misner, Jeryl D English, Wick G Alexander, J Moody Alexander, Ron Gallerano
OBJECTIVE: To analyze the long-term changes in maxillary arch widths and buccal corridor ratios in orthodontic patients treated with and without premolar extractions. METHODS: The study included 53 patients who were divided into the extraction (n = 28) and nonextraction (n = 25) groups. These patients had complete orthodontic records from the pretreatment (T1), posttreatment (T2), and postretention (T3) periods. Their mean retention and postretention times were 4 years 2 months and 17 years 8 months, respectively...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28337354/facial-asymmetry-in-a-crying-newborn-a-comparison-of-two-cases-and-review-of-literature
#7
Shreyas Arya, Sunil K Jain, Carol J Richardson
Facial asymmetry in a crying newborn can be due to a variety of different causes. Neonatal asymmetric crying facies (NACF) is a specific phenotype, which is often underrecognized. It is defined as asymmetry of the mouth and lips with grimacing or smiling, but a symmetric appearance at rest. NACF needs to be differentiated from complete facial palsy in a newborn, which can occur due to traumatic or developmental etiologies. Developmental causes can be present in isolation or may be a part of a recognized syndrome...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28336402/post-operative-efficacy-predictability-safety-and-visual-quality-of-laser-corneal-refractive-surgery-a-network-meta-analysis
#8
Daizong Wen, Colm McAlinden, Ian Flitcroft, Ruixue Tu, Qinmei Wang, Jorge Alió, John Marshall, Yingying Huang, Benhao Song, Liang Hu, Yune Zhao, Senmiao Zhu, Rongrong Gao, Fangjun Bao, Ayong Yu, Ye Yu, Hengli Lian, Jinhai Huang
PURPOSE: To compare the post-operative efficacy, predictability, safety and visual quality of all major forms of laser corneal refractive surgeries for correcting myopia. DESIGN: Systematic review and network meta-analysis. METHODS: MEDLINE, EMBASE, Cochrane Library and the US trial registry was conducted up to November 2015. Randomized controlled trials (RCT) reporting in accordance with the eligibility criteria were included in this review...
March 20, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28335770/a-model-of-influences-on-the-clinical-learning-environment-the-case-for-change-at-one-u-s-medical-school
#9
Howard B Fleit, Richard J Iuli, Janet E Fischel, Wei-Hsin Lu, Latha Chandran
BACKGROUND: The learning environment within a school of medicine influences medical students' values and their professional development. Despite national requirements to monitor the learning environment, mistreatment of medical students persists. METHODS: We designed a program called WE SMILE: We can Eradicate Student Mistreatment In the Learning Environment with a vision to enhance trainee and faculty awareness and ultimately eliminate medical student mistreatment...
March 23, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/28331285/refraction-outcomes-after-suction-loss-during-small-incision-lenticule-extraction-smile
#10
Amr A Gab-Alla
PURPOSE: To evaluate refractive outcomes of two management approaches after suction loss during the small-incision lenticule extraction (SMILE) technique. PATIENTS AND METHODS: This retrospective and comparative study was conducted at the El-Gowhara Private Eye Center. It included 26 consecutive eyes of patients who experienced suction loss during the SMILE technique. Patients were divided into two groups by the technical difficulties in redocking: in group A (12 eyes) suction loss occurred after the posterior lenticular cut and the creation of side-cuts, then suction was reapplied, and the procedure was completed; in group B (14 eyes) suction loss occurred after the posterior lenticular cut and the creation of side-cuts, then the procedure was postponed for 24 hours and completed with the same parameters...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28327110/an-assessment-of-the-impacts-of-child-oral-health-in-indonesia-and-associations-with-self-esteem-school-performance-and-perceived-employability
#11
Diah Ayu Maharani, Melissa Adiatman, Anton Rahardjo, Girvan Burnside, Cynthia Pine
BACKGROUND: Previous surveys have indicated that a majority of Indonesian children have poor oral health. However, little detailed information is available on underlying causation and none that examine impacts of oral health on child self-esteem, school performance and perceived employability. The aim of this study was to determine levels of child oral health in primary school children in Indonesia, the prevalence of key causal factors; and, to determine relationships between oral health, self-esteem and school academic performance...
March 21, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28318639/enhancement-after-small-incision-lenticule-extraction-incidence-risk-factors-and-outcomes
#12
Yu-Chi Liu, Mohamad Rosman, Jodhbir S Mehta
PURPOSE: To report the incidence, risk factors, and outcomes of enhancement after small-incision lenticule extraction (SMILE). DESIGN: Retrospective cohort study. PARTICIPANTS: Five hundred twenty-four eyes of 307 patients who underwent SMILE at Singapore National Eye Center between February 2012 and March 2016. METHODS: The data collected included patient age at primary SMILE, gender, race, preoperative and postoperative manifest refraction spherical equivalent (MRSE), preoperative and postoperative uncorrected distance visual acuity and corrected distance visual acuity, the occurrence of suction loss during the procedure, and the need for enhancement...
March 15, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28318311/treatment-of-vertical-maxillary-excess-without-open-bite-in-a-skeletal-class-ii-hyperdivergent-patient
#13
Cheol-Ho Paik, Hong-Sik Park, Hyo-Won Ahn
A 20-year-old woman visited the office complaining of a gummy smile and lip protrusion. She was diagnosed with vertical maxillary excess without open bite and skeletal Class II hyperdivergent pattern. She refused the surgical-orthodontic treatment option, although she wanted to correct the gummy smile and retruded chin. Differential intrusion of anterior and posterior teeth in both arches was necessary to maximize the skeletal treatment effects. In the maxilla, one palatal temporary anchorage device (TAD), an archwire with an accentuated curve of Spee, and a transpalatal arch were applied...
March 20, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28317667/small-incision-lenticule-extraction-in-a-patient-with-congenital-nystagmus
#14
Bu Ki Kim, Su Joung Mun, Dae Gyu Lee, Hyun Tae Choi, Young Taek Chung
We report a case of a 23-year-old woman with congenital nystagmus who had small-incision lenticule extraction (SMILE) procedure to correct refractive errors. The manifest refraction was -5.50 -1.75 × 180 in the right eye, -5.0 -2.50 × 180 in the left eye, and the patient presented with horizontal pendular nystagmus with an amplitude range of 5 to 10 degrees. Uneventful simultaneous bilateral small-incision lenticule extraction was performed. Six months postoperatively, the uncorrected distance visual acuity was 20/18 with -0...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28317085/perception-of-smile-esthetics-by-laypeople-of-different-ages
#15
Chompunuch Sriphadungporn, Niramol Chamnannidiadha
BACKGROUND: Age is a factor affecting smile esthetics. Three variables of smile esthetics associated with the maxillary anterior teeth and age-related changes have recently received considerable attention: (i) the incisal edge position of the maxillary central incisors, (ii) the maxillary gingival display, and (iii) the presence of a black triangle between the maxillary central incisors. The aim of this study was to evaluate the influence of age on smile esthetic perception based on these three variables in a group of Thai laypeople...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28316236/webmolcs-a-web-based-interface-for-visualizing-molecules-in-3d-chemical-spaces
#16
Mahendra Awale, Daniel Probst, Jean-Louis Reymond
The concept of chemical space provides a convenient framework to analyze large collections of molecules by placing them in property spaces where distances represent similarities. Here we report webMolCS, a new type of web-based interface visualizing up to 5000 user-defined molecules in six different 3D chemical spaces obtained by principal component analysis or similarity mapping of multi-dimensional property spaces describing composition (MQN: 42D Molecular Quantum Numbers, SMIfp: 34D SMILES fingerprint), shapes and pharmacophores (APfp: 20D atom pair fingerprint, Xfp: 55D category extended atom pair fingerprint), and substructures (Sfp: 1024D binary substructure fingerprint, ECfp4: 1024D extended connectivity fingerprint)...
March 19, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28316192/-effect-of-optical-zone-diameter-on-corneal-biomechanical-properties-after-small-incision-lenticule-extraction
#17
P H Wei, Y Wang, H Li, R Dou, L Y Li, W Zhao, J M Zhang
Objective: To investigate the effect of optical zone diameter on corneal biomechanical properties after small incision lenticule extraction (SMILE). Methods: In this prospective case-control study, 62 eyes of 42 patients with myopia and myopic astigmatism that had undergone SMILE procedure were divided into 2 groups according to the optical zone (OZ) diameter: group A, 31 eyes of 19 patients, OZ= 6.5 mm; group B, 31eyes of 23 patients, OZ=6.0 mm. These patients were examined for corneal hysteresis (CH) and corneal resistance factor (CRF) with the Ocular Response Analyzer (ORA) preoperatively and at 1 week, 1 month and 3 months postoperatively; at the same time, the central corneal thickness-corrected indices of DifCH and DifCRF were calculated...
March 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28297090/the-mandibular-muscles-in-contemporary-orthodontic-practice-a-review
#18
M G Woods
It is widely accepted that all dentists should have a thorough understanding of the muscles involved in moving or stabilizing the mandible. However, there is still much discussion regarding the influence of the mandibular muscles on normal facial growth and dental development, as well as on orthodontic treatment and post-treatment stability. Potential patients with different underlying vertical muscle patterns will have differences in the expected directions of future mandibular growth, lateral profile shape, facial and arch widths and vertical occlusal relationships...
March 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28294505/metal-free-intermolecular-aminoarylation-of-alkynes
#19
Pauline T G Rabet, Scott Boyd, Michael F Greaney
A metal-free aminoarylation of internal alkynes is described, yielding tetrasubstituted enaminoates. The transformation proceeds in good to excellent yields through a tandem conjugate addition/Smiles rearrangement involving aryl and heteroaryl sulfonamides. Substrate scope is very broad under simple, user-friendly conditions, and the reaction can be used to easily access biologically active phenethylamine derivatives.
March 13, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28293514/platysma-motor-nerve-transfer-for-restoring-marginal-mandibular-nerve-function
#20
Andres Rodriguez-Lorenzo, David Jensson, Wolfgang J Weninger, Melanie Schmid, Stefan Meng, Chieh-Han John Tzou
BACKGROUND: Injuries of the marginal mandibular nerve (MMN) of the facial nerve result in paralysis of the lower lip muscle depressors and an asymmetrical smile. Nerve reconstruction, when possible, is the method of choice; however, in cases of long nerve gaps or delayed nerve reconstruction, conventional nerve repairs may be difficult to perform or may provide suboptimal outcomes. Herein, we investigate the anatomical technical feasibility of transfer of the platysma motor nerve (PMN) to the MMN for restoration of lower lip function, and we present a clinical case where this nerve transfer was successfully performed...
December 2016: Plastic and Reconstructive Surgery. Global Open
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