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orbital reconstruction

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https://www.readbyqxmd.com/read/28434826/the-accuracy-of-patient-specific-implant-prebented-with-3d-printed-rapid-prototype-model-for-orbital-wall-reconstruction
#1
Young Chul Kim, Woo Shik Jeong, Tae-Kyung Park, Jong Woo Choi, Kyung S Koh, Tae Suk Oh
BACKGROUND: This study evaluated the accuracy of blow out fracture reduction using 3D-printed rapid prototyping (RP) skull modeling. PATIENTS AND METHODS: Retrospective review was performed for 82 patients who underwent post-traumatic orbital wall fracture reduction between 2012 and 2014. Patients were divided into two groups according to the use of 3D-printed RP skull model reproduced by mirroring technique, onto which a titanium mesh was anatomically molded. Using computed tomographic scans, the areas of pre- and post-operative orbital wall defect, the layout angles of the titanium mesh, and the gap lengths between the implant and fracture margin were compared between the two groups...
March 27, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28421723/clinical-outcomes-of-proton-beam-therapy-for-choroidal-melanoma-at-a-single-institute-in-korea
#2
Tae Wan Kim, Euncheol Choi, Jeonghoon Park, Dong-Ho Shin, Su Kyung Jung, Susie Seok, Kwan Ho Cho, Joo-Young Kim, Dae Yong Kim, Tae Hyun Kim, Yang Kwon Suh, Yeon Joo Kim, Sung Ho Moon
Purpose: This study retrospectively evaluated the clinical outcomes and complications of proton beam therapy (PBT) in a single institution in Korea and quantitatively analyzed the change in tumor volume after PBT using magnetic resonance imaging (MRI). Materials and Methods: Twenty-four treatment-naïve patients who underwent PBT for choroidal melanoma between 2009 and 2015 were reviewed. Dose fractionation was 60-70 CGE over 5 fractions. Orbital MRIs were taken at baseline and 3, 6, and 12 months after PBT and annually thereafter...
April 19, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28418042/selective-orbital-reconstruction-in-tetragonal-fes-a-density-functional-dynamical-mean-field-theory-study
#3
Luis Craco, Stefano Leoni
Transport properties of tetragonal iron monosulfide, mackinawite, show a range of complex features. Semiconductive behavior and proximity to metallic states with nodal superconductivity mark this d-band system as unconventional quantum material. Here, we use the density functional dynamical mean-field theory (DFDMFT) scheme to comprehensively explain why tetragonal FeS shows both semiconducting and metallic responses in contrast to tetragonal FeSe which is a pseudogaped metal above the superconducting transition temperature...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417258/in-vivo-facial-soft-tissue-depths-of-a-modern-adult-population-from-germany
#4
Nicolle Thiemann, Volker Keil, Uwe Roy
Forensic facial reconstruction may be the final option available to draw public attention in cases where the identity of an individual cannot be established by standard identification methods. Two fundamental components of all forensic facial reconstruction techniques are cranial morphology and soft tissue depth databases. The purpose of this study was to extend such databases by providing a complete set of accurate facial soft tissue thickness measurements, acquired from a contemporary adult population from Germany...
April 17, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28417054/three-dimensional-and-topographic-relationships-between-the-orbital-margins-with-reference-to-assessment-of-eyeball-protrusion
#5
Kang-Jae Shin, Shin-Hyo Lee, Ki-Seok Koh, Wu-Chul Song
This study investigated the topographic relationships among the eyeball and four orbital margins with the aim of identifying the correlation between orbital geometry and eyeball protrusion in Koreans. Three-dimensional (3D) volume rendering of the face was performed using serial computed-tomography images of 141 Koreans, and several landmarks on the bony orbit and the cornea were directly marked on the 3D volumes. The anterior-posterior distances from the apex of the cornea to each orbital margin and between the orbital margins were measured in both eyes...
March 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28412263/oculocardiac-reflex-in-an-orbital-fracture-without-entrapment
#6
Timothy C Woernley, Thomas L Wright, Duc N Lam, Jonathon S Jundt
Large orbital fractures in older patients are infrequently associated with an exaggerated oculocardiac reflex. This report describes the case of a patient in his 40s with a large right orbital floor and medial wall fracture without radiographic evidence of extraocular muscle compression or entrapment who developed severe nausea and bradycardia with movement of his affected eye. The patient exhibited bradycardia to 17 beats per minute during the initial examination and was taken urgently to the operating room for reconstruction of the right orbital floor and medial wall...
March 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28411135/silent-sinus-syndrome%C3%A2-a-traumatic-case
#7
E Février, C Vandersteen, L Castillo, C Savoldelli
INTRODUCTION: Silent sinus syndrome is an unusual cause of progressive enophthalmos and hypoglobus due to atelectasia of the maxillary sinus associated with osteolysis of the orbital floor. This syndrome is classically idiopathic, but the term is also used to describe traumatic or iatrogenic (surgical orbital decompression) cases. CASE REPORT: We report the case of a 33-year-old man who presented with a left orbital trauma without functional disorder. Computed tomography (CT) scan revealed a nondisplaced fracture of the left orbital floor...
April 11, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28409229/sphenoid-dysplasia-in-neurofibromatosis-type-1-a-new-technique-for-repair
#8
Di Rocco Concezio, Samii Amir, Tamburrini Gianpiero, Massimi Luca, Giordano Mario
PURPOSE: Sphenoid bone dysplasia in neurofibromatosis type 1 is characterized by progressive exophthalmos and facial disfiguration secondary to herniation of meningeal and cerebral structures. We describe a technique for reconstruction of the sphenoid defect apt at preventing or correcting the ocular globe dislocation. METHODS: After placement of spinal cerebrospinal fluid drainage to reduce intracranial pressure, the temporal pole is posteriorly dislocated extradurally...
April 13, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28403132/orbital-reconstruction-in-neuroectodermal-tumor-of-the-orbit-multimodal-treatment-approach
#9
Jorge Ernesto Cantini A, Diana M Díaz López, Esteban Francisco Hernandez Florez
INTRODUCTION: Primitive neuroectodermal tumors of peripheral origin are very rare, and orbital neuroectodermal tumors are even more uncommon. Only 25 patients with primary orbital involvement in the pediatric age group have been reported. METHODS: In this article, the authors describe their experience in the multimodality treatment approach to treat neuroectodermal tumor of the orbit. The authors also present a male patient 3-year old presenting with a neuroectodermal tumor of the right orbit causing rapidly progressive proptosis...
April 11, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28397435/female-and-male-orbit-asymmetry-digital-analysis
#10
Tomasz Lepich, Józefa Dąbek, Małgorzata Witkowska, Edyta Jura-Szołtys, Grzegorz Bajor
BACKGROUND: Standard anthropometric methods applied to measurements of the skull differentials are laden with mistakes stemming from the way the measuring devices are built and from a lack of experience on the part of the researchers. To increase objectivity, digital imaging measurements via computer systems were introduced. OBJECTIVES: The aim of this research was to assess the asymmetry of the male and female orbit with the application of the new graphic methods: raster graphics and vector graphics...
January 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28388157/electronic-structures-of-rutile-011-2-%C3%A3-1-surfaces-a-many-body-perturbation-theory-study
#11
Guokui Liu, Tingwei Chen, Xiaobiao Liu, Fan Jin, Shiling Yuan, Yuchen Ma
Using the GW method within many-body perturbation theory, we investigate the electronic properties of the rutile (011) surfaces with different reconstruction patterns. We find that keeping the Ti:O ratio on the reconstructedsurface to 1:2 enlarges the bandgap of the rutile (011) surface to ca. 4.0 eV. Increasing the content of O atoms in the surface can turn rutile into a semi-metal. For some surfaces, it is important to apply self-consistent GW calculation to get the correct charge distributions for the frontier orbitals, which are relevant to the photocatalytic behavior of TiO2...
March 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28384725/predictions-of-optic-nerve-traction-forces-and-peripapillary-tissue-stresses-following-horizontal-eye-movements
#12
Xiaofei Wang, Liam K Fisher, Dan Milea, Jost B Jonas, Michaël J A Girard
Purpose: To use finite element (FE) analysis to predict the optic nerve sheath traction forces that act on the optic nerve head (ONH) following horizontal eye movements, and the resulting stress levels in the peripapillary connective tissues of the ONH (Bruch's membrane [BM] and sclera). Methods: An FE model of a healthy eye was reconstructed in primary gaze position that included details from the orbital and ONH tissues. Optic nerve sheath traction forces and peripapillary tissue stresses in both adduction and abduction (13°) were computed using FE analysis...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28384240/supplementary-cranial-description-of-the-types-of-edmontosaurus-regalis-ornithischia-hadrosauridae-with-comments-on-the-phylogenetics-and-biogeography-of-hadrosaurinae
#13
Hai Xing, Jordan C Mallon, Margaret L Currie
The cranial anatomy of the flat-skulled hadrosaurine Edmontosaurus regalis (Ornithischia: Hadrosauridae) is extensively described here, based on the holotype and paratype collected from the middle part of the Horseshoe Canyon Formation in southern Alberta. Focus is given to previously undocumented features of ontogenetic and phylogenetic importance. This description facilitates overall osteological comparisons between E. regalis and other hadrosaurids (especially E. annectens), and revises the diagnosis of E...
2017: PloS One
https://www.readbyqxmd.com/read/28378755/tropical-rainfall-over-the-last-two-millennia-evidence-for-a-low-latitude-hydrologic-seesaw
#14
Franziska A Lechleitner, Sebastian F M Breitenbach, Kira Rehfeld, Harriet E Ridley, Yemane Asmerom, Keith M Prufer, Norbert Marwan, Bedartha Goswami, Douglas J Kennett, Valorie V Aquino, Victor Polyak, Gerald H Haug, Timothy I Eglinton, James U L Baldini
The presence of a low- to mid-latitude interhemispheric hydrologic seesaw is apparent over orbital and glacial-interglacial timescales, but its existence over the most recent past remains unclear. Here we investigate, based on climate proxy reconstructions from both hemispheres, the inter-hemispherical phasing of the Intertropical Convergence Zone (ITCZ) and the low- to mid-latitude teleconnections in the Northern Hemisphere over the past 2000 years. A clear feature is a persistent southward shift of the ITCZ during the Little Ice Age until the beginning of the 19th Century...
April 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28362743/characterizing-a-14%C3%A2-%C3%A3-%C3%A2-14-oam-mode-transfer-matrix-of-a-ring-core-fiber-based-on-quadrature-phase-shift-interference
#15
Guoxuan Zhu, Yujie Chen, Yuehan Liu, Yanfeng Zhang, Siyuan Yu
The transfer matrix of light propagating in fibers can quantitatively elucidate the mechanisms of mode coupling, thus having important implications for the knowledge such as the mode division multiplexing communication link characteristics in fibers. However, most methods for measuring the transfer matrix require a prior knowledge of the launched modes at the input and a complex optical system for the characterization at the output of the fiber. In this Letter, we use an interferometric approach for decomposing orbital angular momentum (OAM) modes of the output beams from a ring-core fiber, thereby processing a 14×14 OAM mode transfer matrix of the fiber with merely a camera imaging the mode field at the output of the fiber...
April 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28362272/spectroscopic-signatures-of-different-symmetries-of-the-superconducting-order-parameter-in-metal-decorated-graphene
#16
Timo Saari, Jouko Nieminen, Arun Bansil
Motivated by the recent experiments indicating superconductivity in metal-decorated graphene sheets, we investigate their quasi-particle structure within the framework of an effective tight-binding Hamiltonian augmented by appropriate BCS-like pairing terms for p-type order parameter. The normal state band structure of graphene is modified not only through interaction with adsorbed metal atoms, but also due to the folding of bands at Brillouin zone boundaries resulting from a [Formula: see text] reconstruction...
March 31, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28356694/naso-orbital-fistula-and-socket-reconstruction-with-radial-artery-forearm-flap-following-orbital-mucormycosis
#17
Ankur Bhatnagar, Amit Agarwal
Invasive mucormycosis is an uncommon cause of orbital exenteration. Reconstruction of an exenterated orbit is a surgical challenge. The loss of eyelids, adnexal structures, and even surrounding skin causes significant facial disfigurement. The goal for reconstruction demands a symmetrical orbital cavity with good prosthetic rehabilitation. Multiple reconstructive options in the form of skin grafts, local flaps, and free flaps are available. However, none of them provide ideal reconstruction. Our patient not only had extensive soft-tissue loss and unstable lining but also a large naso-orbital fistula...
July 2016: National Journal of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28353345/defect-induced-band-edge-reconstruction-of-a-bismuth-halide-double-perovskite-for-visible-light-absorption
#18
Adam H Slavney, Linn Leppert, Davide Bartesaghi, Aryeh Gold-Parker, Michael F Toney, Tom J Savenije, Jeffrey B Neaton, Hemamala I Karunadasa
Halide double perovskites have recently been developed as less toxic analogs of the lead perovskite solar-cell absorbers APbX3 (A = monovalent cation; X = Br or I). However, all known halide double perovskites have large bandgaps that afford weak visible-light absorption. The first halide double perovskite evaluated as an absorber, Cs2AgBiBr6 (1), has a bandgap of 1.95 eV. Here, we show that dilute alloying decreases 1's bandgap by ca. 0.5 eV. Importantly, time-resolved photoconductivity measurements reveal long-lived carriers with microsecond lifetimes in the alloyed material, which is very promising for photovoltaic applications...
March 29, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28351395/follicular-thyroid-carcinoma-metastasis-to-the-facial-skeleton-a-systematic-review
#19
Varun V Varadarajan, Elizabeth K Pace, Vatsal Patel, Raja Sawhney, Robert J Amdur, Peter T Dziegielewski
BACKGROUND: Follicular thyroid carcinoma (FTC) metastasis to the facial skeleton is exceedingly rare. A case of FTC metastasizing to the mandible is presented and a systematic review of the literature describing thyroid metastasis to the facial skeleton is performed. CASE PRESENTATION: A 73-year-old female presented with metastatic FTC to the mandible and underwent total thyroidectomy, segmental mandibulectomy, bone impacted fibular free flap reconstruction, and adjuvant radioactive iodine treatment...
March 28, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28350676/comparison-of-the-outcomes-of-complex-orbital-fracture-repair-with-and-without-a-surgical-navigation-system-a-prospective-cohort-study-with-historical-controls
#20
Emanuele Zavattero, Guglielmo Ramieri, Fabio Roccia, Giovanni Gerbino
BACKGROUND: In severe orbital fractures, restoration of orbital shape and volume is required to avoid diplopia and posttraumatic enophthalmos. The purpose of this study was to compare outcomes between navigation-aided and conventional techniques for complex unilateral orbital fractures using titanium mesh. METHODS: The outcomes and the computed tomography-measured orbital volume of two groups of orbital complex unilateral reconstruction cases were compared. The study group consisted of a consecutive cohort of unilateral severe orbital fracture that underwent surgery with the aid of a Brainlab navigation system...
April 2017: Plastic and Reconstructive Surgery
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