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https://www.readbyqxmd.com/read/29793112/3d-printed-membrane-as-an-alternative-to-amniotic-membrane-for-ocular-surface-conjunctival-defect-reconstruction-an-in-vitro-in-vivo-study
#1
Shima Dehghani, Morteza Rasoulianboroujeni, Hamed Ghasemi, Saeed Heidari Keshel, Zohreh Nozarian, Mohammad Naser Hashemian, Mehran Zarei-Ghanavati, Golshan Latifi, Reza Ghaffari, Zhanfeng Cui, Hua Ye, Lobat Tayebi
BACKGROUND: The aim of this study was to evaluate the surgical handling and clinical applicability of a specific 3D-printed membrane design fabricated using a gelatin, elastin and sodium hyaluronate blend for conjunctival reconstruction and compare it with amniotic membrane (AM), which is normally used in such surgeries. METHODS: 3D printing technique was employed to fabricate the membrane based on gradient design. Prior to printing, rheometry was employed to optimize the ink composition...
May 11, 2018: Biomaterials
https://www.readbyqxmd.com/read/29787360/myotarsal-flap-a-versatile-entity-for-lower-eyelid-reconstructions
#2
Hemant K Mehta
The purpose is to present a new surgical technique using myotarsal (MT) flap for reconstruction of small to subtotal full thickness defects - up to 8 mm in height - of lower eyelids, without needing concomitant supplementary procedures. MT flap consists of a 3 mm tarsal strip with attached levator complex. It does not have conjunctival lining or pedicle. Versatility of the flap extends to correction of mild to severe ptosis, and retraction of upper eyelids. This is a retrospective personal series of 163 patients, who underwent surgical reconstruction with MT flap overlaid with quilted skin graft (modified myotarsal flap) after excision of malignant tumours of lower eyelid...
June 2018: Orbit
https://www.readbyqxmd.com/read/29775558/reconstructing-a-traumatic-empty-orbit-principles-difficulties-of-treatment-and-literature-review
#3
REVIEW
Panagiotis Stathopoulos, Philip Ameerally
PURPOSE: This report describes the case of a serious orbital injury in which the globe was completely displaced into the nasal cavity and the orbit was clinically empty. The authors discuss the difficulties encountered in the management of this patient and their principles in the reconstruction of a complex defect. MATERIALS AND METHODS: In this rare case of severe injury, the authors used a combined transconjunctival and ethmoidal approach to retrieve the displaced globe from the nasal cavity...
April 21, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29771829/repairing-a-facial-cleft-by-polyether-ether-ketone-implant-combined-with-titanium-mesh
#4
Yuan Deng, Weiwei Tang, Zhengkang Li
The Tessier Number 4 cleft is one of the rarest, most complex craniofacial anomalies that presents difficulties in surgical treatment. In this article, we report a case of simultaneous facial depression, eye displacement, and medial canthus deformity. In this case, the maxillary bony defect was reconstructed using computer-assisted design computer-assisted manufacturing (CAD-CAM) polyether-ether-ketone (PEEK) material, and the orbital floor defect was repaired with AO prefabricated titanium mesh. Additionally, the medial canthus was modified with canthopexy and a single Z-plasty flap...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29766384/increased-functional-meg-connectivity-as-a-hallmark-of-mri-negative-focal-and-generalized-epilepsy
#5
Yiwen Li Hegner, Justus Marquetand, Adham Elshahabi, Silke Klamer, Holger Lerche, Christoph Braun, Niels K Focke
Epilepsy is one of the most prevalent neurological diseases with a high morbidity. Accumulating evidence has shown that epilepsy is an archetypical neural network disorder. Here we developed a non-invasive cortical functional connectivity analysis based on magnetoencephalography (MEG) to assess commonalities and differences in the network phenotype in different epilepsy syndromes (non-lesional/cryptogenic focal and idiopathic/genetic generalized epilepsy). Thirty-seven epilepsy patients with normal structural brain anatomy underwent a 30-min resting state MEG measurement with eyes closed...
May 15, 2018: Brain Topography
https://www.readbyqxmd.com/read/29765948/congenital-orbital-rhabdomyosarcoma
#6
Masoomeh Eghtedari, Amir Reza Farsiani, Mohammad Reza Bordbar
Rhabdomyosarcoma (RMS) is the most common malignant tumor of the orbit in children, but it is rarely present at birth. We report a large congenital orbital RMS with intracranial extension in a newborn baby. A newborn baby girl was referred to our hospital due to severe right-eye exophthalmia. Imaging studies showed an orbital mass with intracranial extension. Treatment was started with a course of neoadjuvant chemotherapy followed by right orbital exenteration and intracranial resection of the tumor. Histologic examination of the mass showed undifferentiated malignant small-cell tumor...
April 2018: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29765297/group-analysis-in-fieldtrip-of-time-frequency-responses-a-pipeline-for-reproducibility-at-every-step-of-processing-going-from-individual-sensor-space-representations-to-an-across-group-source-space-representation
#7
Lau M Andersen
An important aim of an analysis pipeline for magnetoencephalographic (MEG) data is that it allows for the researcher spending maximal effort on making the statistical comparisons that will answer his or her questions. The example question being answered here is whether the so-called beta rebound differs between novel and repeated stimulations. Two analyses are presented: going from individual sensor space representations to, respectively, an across-group sensor space representation and an across-group source space representation...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29765271/approach-to-reconstruction-of-nasal-defects
#8
REVIEW
Berkay Başağaoğlu, Kausar Ali, Pierce Hollier, Renata S Maricevich
The nose is the most central and anterior projecting facial feature. Therefore, the presence of a defect is easily noticeable to the untrained eye. Return of the defect to the original form is an achievable end goal of reconstruction, necessitating appropriate reformation of three-dimensional geometry, proper establishment of symmetry, and excellent color and texture match to the adjacent structures. Regarding its physiological importance, disruption of the normal function may cause respiratory obstruction and contribute to patient distress...
May 2018: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/29750729/posterior-lamellar-reconstruction-of-the-lower-eyelid-with-a-gingivoalveolar-mucosal-graft
#9
Yahya Baltu
The anterior and posterior lamellae should be simultaneously reconstructed to repair the upper and lower eyelid's full thickness defects after resection of a malignant tumor. The author described a gingivoalveolar mucosal graft for posterior lamellar reconstruction of the lower eyelid. Between November 2014 and September 2017, 11 patients (6 women, 5 men; mean age 62.7 years) with 13 posterior lamellar defect of lower eyelid underwent reconstruction with gingivoalveolar mucosal graft. The defects ranged from 10 x 8 mm to 20 x 10 mm...
May 10, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29742577/surgical-management-of-the-recent-orbital-war-injury
#10
Safaa Riyadh, Saif Saadedeen Abdulrazaq, Ali Mhana Sabeeh Zirjawi
Maxillofacial trauma affects sensitive and essential functions for the human being such as smell, breathing, talking, and the most importantly the sight. Trauma to the orbit may cause a vision loss especially if this trauma yields a high kinetic energy like that encountered during wars. The purpose of the study was to evaluate the surgical outcomes of the orbital war trauma, enriching the literature with the experience of the authors in this field. A total of 16 patients were injured, evacuated, and managed, between June 2014 and June 2017, from the fight between the Iraqi army and the Islamic State of Iraq and Syria (ISIS) in different areas of Iraq...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29734825/skin-and-eye-irritation-assessment-of-oil-palm-elaeis-guineensis-leaf-extract-for-topical-application
#11
Nor Zuliana Yusof, Siti Salwa Abd Gani, Zafarizal Aldrin Azizul Hasan, Zainab Idris
Many types of phytochemicals have been found to be present in oil palm leaf and could potentially be used as functional ingredients for skincare product. However, as of today, there is no published report on hazard identification and safety assessment of oil palm ( Elaeis guineensis) leaf extract (OPLE), particularly on skin and eye irritation. In this study, potential hazard of OPLE on skin and eye irritation was evaluated as an initial step to the safety assessment of OPLE. In vitro cell viability study of OPLE on normal human dermal fibroblasts showed that OPLE was nontoxic to the cells with percentage viability more than 90% after 24 and 48 hours of incubation...
January 1, 2018: International Journal of Toxicology
https://www.readbyqxmd.com/read/29718983/assessment-of-accuracy-and-recognition-of-three-dimensional-computerized-forensic-craniofacial-reconstruction
#12
Geraldo Elias Miranda, Caroline Wilkinson, Mark Roughley, Thiago Leite Beaini, Rodolfo Francisco Haltenhoff Melani
Facial reconstruction is a technique that aims to reproduce the individual facial characteristics based on interpretation of the skull, with the objective of recognition leading to identification. The aim of this paper was to evaluate the accuracy and recognition level of three-dimensional (3D) computerized forensic craniofacial reconstruction (CCFR) performed in a blind test on open-source software using computed tomography (CT) data from live subjects. Four CCFRs were produced by one of the researchers, who was provided with information concerning the age, sex, and ethnic group of each subject...
2018: PloS One
https://www.readbyqxmd.com/read/29716129/color-fourier-orthoscopic-holography-with-laser-capture-and-an-led-display
#13
Tomasz Kozacki, Maksymilian Chlipala, Piotr L Makowski
We present an end-to-end full color Fourier holographic imaging approach, which involves standard holographic recording with three wavelengths and an improved LED-driven display. It provides almost undistorted orthoscopic reconstruction of large objects in full color, which can be viewed with a naked eye. High quality reconstruction is preserved across large object depths, measured in meters, as shown theoretically and experimentally. Our imaging approach is based on capture, processing and display of the object wave fields without spherical phase factors...
April 30, 2018: Optics Express
https://www.readbyqxmd.com/read/29715954/holographic-near-eye-display-system-based-on-double-convergence-light-gerchberg-saxton-algorithm
#14
Peng Sun, Shengqian Chang, Siqi Liu, Xiao Tao, Chang Wang, Zhenrong Zheng
In this paper, a method is proposed to implement noises reduced three-dimensional (3D) holographic near-eye display by phase-only computer-generated hologram (CGH). The CGH is calculated from a double-convergence light Gerchberg-Saxton (GS) algorithm, in which the phases of two virtual convergence lights are introduced into GS algorithm simultaneously. The first phase of convergence light is a replacement of random phase as the iterative initial value and the second phase of convergence light will modulate the phase distribution calculated by GS algorithm...
April 16, 2018: Optics Express
https://www.readbyqxmd.com/read/29681840/intraoperative-adjunctive-mitomycin-c-and-cryotherapy-for-recurrent-conjunctival-papillary-sebaceous-carcinoma
#15
Natsuki Monai, Reiko Tanabu, Takayuki Gonome, Katsunori Yokoi, Satoshi Urushidate, Satoko Morohashi, Hideaki Hirai, Akira Kurose, Mitsuru Nakazawa
Purpose: To report a case of recurrent conjunctival papillary sebaceous carcinoma that was successfully treated by a combination of surgical resection, intraoperative topical mitomycin C application, and cryotherapy. Observations: A woman in her 80s developed a yellowish papillary tumor pedunculated from the surface of the upper palpebral tarsal conjunctiva in her left eye. She was histopathologically diagnosed as having sebaceous carcinoma by an excisional biopsy...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29675394/cryopreserved-limbal-lamellar-keratoplasty-for-peripheral-corneal-and-limbal-reconstruction
#16
Hua-Tao Xie, Jing Li, Yang Liu, Dong-Ling Jiang, Rui-Fen Shen, Ming-Chang Zhang
This study aimed to evaluate the outcomes and described the recovery process of cryopreserved limbal lamellar keratoplasty (CLLK) for peripheral corneal and limbal diseases. Thirteen eyes of 12 patients with a mean age of 41±23.9y were included. The average follow-up was 12.1±5.6mo. Stable ocular surface was achieved in all eyes at last follow-up. Epithelialization originated from both recipient and graft in 9 eyes. We conclude that CLLK compensates for the shortage of donor corneas and cryopreserved limbal grafts provide epithelialization sources in ocular surface reconstruction...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29649064/incomplete-facial-paralysis-the-use-of-the-ipsilateral-residual-facial-nerve-as-a-donor-nerve-for-facial-reanimation
#17
Eyal Gur, Ron M Zuker, Arik Zaretski, David Leshem, Yoav Barnea, Ehud Arad, Ravit Yanko, Beni Meilik, Daniel J Kedar, Ehud Fliss
BACKGROUND: The reconstructive approach for incomplete facial paralysis is not yet determined. In this article we present a new surgical approach for patients with incomplete facial paralysis in which residual, ineffective movement is detected pre-operatively in the ipsilateral bucco-zygomatic territory of the paretic facial nerve. METHODS: Sixteen patients with incomplete facial paralysis were found eligible for the procedure and underwent one-stage facial reanimation by the senior author (E...
March 29, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29628877/source-reconstruction-of-brain-potentials-using-bayesian-model-averaging-to-analyze-face-intra-domain-vs-face-occupation-cross-domain-processing
#18
Ela I Olivares, Agustín Lage-Castellanos, María A Bobes, Jaime Iglesias
We investigated the neural correlates of the access to and retrieval of face structure information in contrast to those concerning the access to and retrieval of person-related verbal information, triggered by faces. We experimentally induced stimulus familiarity via a systematic learning procedure including faces with and without associated verbal information. Then, we recorded event-related potentials (ERPs) in both intra-domain (face-feature) and cross-domain (face-occupation) matching tasks while N400-like responses were elicited by incorrect eyes-eyebrows completions and occupations, respectively...
2018: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/29626113/low-resolution-vision-in-a-velvet-worm-onychophora
#19
John Daniel Kirwan, Josefine Graf, Jochen Smolka, Georg Mayer, Miriam Judith Henze, Dan-Eric Nilsson
Onychophorans, also known as velvet worms, possess a pair of simple lateral eyes, and are a key lineage with regard to the evolution of vision. They resemble ancient Cambrian forms, and are closely related to arthropods, which boast an unrivalled diversity of eye designs. Nonetheless, the visual capabilities of onychophorans have not been well explored. Here, we assess the spatial resolution of the onychophoran Euperipatoides rowelli using behavioural experiments, three-dimensional reconstruction, anatomical and optical examinations, and modelling...
April 6, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29622664/multiple-spectral-channels-in-branchiopods-i-vision-in-dim-light-and-neural-correlates
#20
Nicolas Lessios, Ronald L Rutowski, Jonathan H Cohen, Marcel E Sayre, Nicholas J Strausfeld
Animals that have true color vision possess several spectral classes of photoreceptors. Pancrustaceans (Hexapoda + Crustacea) that integrate spectral information about their reconstructed visual world do so from photoreceptor terminals supplying their second optic neuropils, with subsequent participation of the third (lobula) and deeper centers (optic foci). Here we describe experiments and correlative neural arrangements underlying convergent visual pathways in two species of branchiopod crustaceans that have to cope with a broad range of spectral ambience and illuminance in ephemeral pools, yet possess just two optic neuropils, the lamina and optic tectum...
April 5, 2018: Journal of Experimental Biology
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