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https://www.readbyqxmd.com/read/27906262/light-field-and-holographic-three-dimensional-displays-invited
#1
Masahiro Yamaguchi
A perfect three-dimensional (3D) display that satisfies all depth cues in human vision is possible if a light field can be reproduced exactly as it appeared when it emerged from a real object. The light field can be generated based on either light ray or wavefront reconstruction, with the latter known as holography. This paper first provides an overview of the advances of ray-based and wavefront-based 3D display technologies, including integral photography and holography, and the integration of those technologies with digital information systems...
December 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27906082/secondary-correction-of-nasal-deformities-in-cleft-lip-and-palate-patients-surgical-technique-and-outcome-evaluation
#2
Gabor Vass, Gabor Mohos, Zsofia Bere, Laszlo Ivan, Janos Varga, Jozsef Piffko, Laszlo Rovo
BACKGROUND: Nasal deformity associated with cleft lip and palate is a highly challenging reconstructive problem in rhinoplasty. In the literature, several operative solutions and evaluation methods have been described, however these do not offer a standard procedure for the surgeon. Our aim was to standardize our surgical technique-as much as the uniqueness of each case allowed it-based on the most frequent deformities we had faced; and to evaluate our results via a postoperative patient satisfaction questionnaire...
December 1, 2016: Head & Face Medicine
https://www.readbyqxmd.com/read/27903636/spatiotopic-maps-during-dynamic-head-tilt
#3
Kyriaki Mikellidou, Marco Turi, David Charles Burr
Humans maintain a stable representation of the visual world effortlessly, despite constant movements of the eyes, head and body, across multiple planes. Whereas visual stability in the face of saccadic eye-movements has been intensely researched, fewer studies have investigated retinal image transformations induced by head movements, especially in the frontal plane. Unlike head rotations in the horizontal and sagittal planes, tilting the head in the frontal plane is only partially counteracted by torsional eye-movements, and consequently induces a distortion of the retinal image to which we seem to be completely oblivious...
November 30, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27899164/nano-sized-cuboid-shaped-phase-in-mg-nd-y-alloy-and-its-behavior-during-isothermal-aging
#4
Jingxu Zheng, Zhongyuan Luo, Lida Tan, Bin Chen
In the present study, nano-sized cuboid-shaped particles in Mg-Nd-Y are studied by means of Cs-corrected atomic-scale high-angle annular dark-field scanning transmission electron microscopy. The structure of the cuboid-shaped phase is identified to be yttrium (major component) and neodymium atoms in face-centered cubic arrangement without the participation of Mg. The lattice parameter a=5.15 Å. During isothermal aging at 225°C, Mg3(Nd,Y) precipitates adhere to surface (100) planes of the cuboid-shaped particles with the orientation relationship: $[100]_{{{\rm Mg}_{{\rm 3}} {\rm RE}}} \,/\,\,/\,[100]_{{{\rm Cuboid}}} $ and $[310]_{{{\rm Mg}_{{\rm 3}} {\rm RE}}} \,/\,\,/\,[012]_{{{\rm Cuboid}}} $ ...
November 30, 2016: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/27894585/pre-expanded-intercostal-perforator-super-thin-skin-flap
#5
REVIEW
Yunjun Liao, Yong Luo, Feng Lu, Hiko Hyakusoku, Jianhua Gao, Ping Jiang
This article introduces pre-expanded super-thin intercostal perforator flaps, particularly the flap that has a perforator from the first to second intercostal spaces. The key techniques, advantages and disadvantages, and complications and management of this flap are described. At present, the thinnest possible flap is achieved by thinning the pre-expanded flap that has a perforator from the first to second intercostal spaces. It is used to reconstruct large defects on the face and neck, thus restoring function and cosmetic appearance...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894583/pre-expanded-supraclavicular-artery-perforator-flap
#6
REVIEW
Norbert Pallua, Bong-Sung Kim
The supraclavicular artery perforator (SAP) flap is a versatile flap for the reconstruction of head and neck defects. Recently, the authors have modified the SAP flap by using an anterior branch of the transverse cervical artery. The anterior SAP flap allows the harvest of a tissue island in the deltopectoral fossa, which is even thinner, is more pliable, and shows a superior color match to the face and neck compared with the original SAP flap. Pre-expansion increases flap size considerably, enabling the coverage of extended defects without the need of microsurgery...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894582/pre-expanded-transverse-cervical-artery-perforator-flap
#7
REVIEW
Huifeng Song, Jiake Chai
The face and neck are important areas for function and appearance. High-quality skin flaps should be used to reconstruct defects in the cervicofacial region. This article introduces the pre-expanded transverse cervical artery perforator flap, which can be used for cervicofacial reconstruction after burns, trauma, and tumor resection with excellent results. This perforator flap is one of the best options for cervicofacial reconstruction in terms of color and texture match, and has fewer flap complications. With regard to the expanded flap, the donor site can be sutured directly leaving only an inconspicuous linear scar...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894581/pre-expanded-super-thin-skin-perforator-flaps
#8
REVIEW
Chunmei Wang, Sifen Yang, Lee L Q Pu
Patients with severe postburn scar contractures underwent reconstruction of skin defects after scar excision with pre-expanded super-thin skin perforator flaps supplied primarily by perforators via the "bridging effect" from the branches of the adjacent arteries as 2-stage procedures. Pre-expansion is an innovative technique and may improve the anastomoses between subdermal vascular plexuses and extend the supplying area of these vessels to the flap. Such a flap becomes super thin, but with a prefabricated blood supply it can be used for reconstruction of skin defects of the face, neck, or other body part with improved functional and cosmetic outcomes...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894579/future-perspectives-of-pre-expanded-perforator-flaps
#9
REVIEW
Lee L Q Pu, Chunmei Wang
Although clinical application of a pre-expanded perforator flap is primarily focused on face and neck reconstructions, such a flap has also been used to reconstruct defects in the trunk, extremities, or hands. With better understanding of the improved blood supply to the flap and the mechanism on the prefabrication of blood supply within the flap, the pre-expanded perforator flap will definitely play a more important role in reconstructive surgery and can be used in selected patients by many plastic surgeons worldwide with good reconstructive and cosmetic outcomes...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894577/pre-expanded-prefabricated-monoblock-perforator-flap-for-total-facial-resurfacing
#10
REVIEW
Tao Zan, Yashan Gao, Haizhou Li, Bin Gu, Feng Xie, Qingfeng Li
In this article, we present the pre-expanded, prefabricated supercharged cervicothoracic monoblock perforator flap for total or subtotal facial resurfacing. This technique can be a reliable reconstruction option for extensive facial skin defect with undamaged muscles and deep structures, which could provide excellent aesthetic and functional outcomes with acceptable complications. Our approach may replace a conventional "skin-only" face allotransplantation in selected patients.
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894576/pre-expanded-bipedicled-supratrochlear-perforator-flap-for-simultaneous-reconstruction-of-the-nasal-and-upper-lip-defects
#11
REVIEW
Shaoqing Feng, Zheng Zhang, Wenjing Xi, Davide Lazzeri, Yong Fang, Yi Xin Zhang
The double "S" principle should be followed for facial reconstruction: the "similarity" of the donor site to the defect area and the reconstruction should be based on the different "subunits" of the face. In this article the pre-expanded, bipedicled supratrochlear perforator flap method is described, which is used for the resurfacing of both nasal and upper lip defects. This method can provide 2 independent flaps with sufficient tissue from 1 single donor site, resurfacing the nasal and upper lip units separately and providing an unparalleled color and texture match and ideal reconstructive result...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894574/an-overview-of-pre-expanded-perforator-flaps-part-2-clinical-applications
#12
REVIEW
Chunmei Wang, Jing Zhang, Hiko Hyakusoku, Ping Song, Lee L Q Pu
Pre-expanded perforator flaps have several advantages over their traditional counterparts owing to the thin, more pliable nature, larger size, and minimum morbidity of the donor site. Recently, plastic surgeons have begun to use pre-expanded perforator flaps to reconstruct defects of almost the entire body, including the cervicofacial region, axilla, trunk, and extremities resulting from scar, congenital melanocytic nevi, hemangiomas, and neurofibromas. Such a versatile flap is especially appropriate for face and neck resurfacing, which requires more optimal functional and cosmetic outcomes...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27892977/societal-value-of-surgery-for-facial-reanimation
#13
Peiyi Su, Lisa E Ishii, Andrew Joseph, Jason Nellis, Jacob Dey, Kristin Bater, Patrick J Byrne, Kofi D O Boahene, Masaru Ishii
Importance: Patients with facial paralysis are perceived negatively by society in a number of domains. Society's perception of the health utility of varying degrees of facial paralysis and the value society places on reconstructive surgery for facial reanimation need to be quantified. Objective: To measure health state utility of varying degrees of facial paralysis, willingness to pay (WTP) for a repair, and the subsequent value of facial reanimation surgery as perceived by society...
November 17, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27890228/tissue-engineered-prevascularized-bone-and-soft-tissue-flaps
#14
REVIEW
F Kurtis Kasper, James Melville, Jonathan Shum, Mark Wong, Simon Young
The complex shapes of skeletal components of the craniofacial region combined with the prominence of the face and paucity of overlying soft tissue create significant challenges for the reconstructive surgeon. The in vivo bioreactor strategy is a promising alternative to microvascular surgical techniques that combines tissue engineering principles with microvascular reconstructive techniques to create patient-specific, prevascularized bone flaps for reconstruction of complex maxillofacial defects. This article discusses the use of traditional vascularized bone flaps; preclinical studies using the in vivo bioreactor approach; case reports that have attempted this novel technique; and future challenges and considerations in the development of patient-specific, prevascularized bone flaps for maxillofacial reconstruction...
February 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/27885973/leprosy-trends-at-a-tertiary-care-hospital-in-mumbai-india-from-2008-to-2015
#15
Thirumugam Muthuvel, Petros Isaakidis, Hemant Deepak Shewade, Lucy Kattuppara, Rajbir Singh, Srinivas Govindarajulu
BACKGROUND: Leprosy remains an important cause of preventable disabilities. After the advent of multidrug therapy, new leprosy cases have come down dramatically. Despite this achievement, India, which contributes 60% of the global leprosy burden, faces some challenges to eliminate the disease, including active transmission in the community and delayed diagnosis of leprosy patients. OBJECTIVES: The objectives of the study were 1) to determine sociodemographic and clinical characteristics of newly diagnosed adults and children (less than 15 years) with leprosy and their trends over time (2008-2015) and 2) to describe the profile of surgical procedures among leprosy patients registered for reconstructive surgeries during 2006-2015...
2016: Global Health Action
https://www.readbyqxmd.com/read/27881936/autologous-fat-transfer-to-the-subcutaneous-tissue-in-the-context-of-breast-reconstructive-procedures
#16
REVIEW
Pawel Szychta, Marek Zadrozny, Jan Rykala, Lukasz Banasiak, Henryk Witmanowski
Autologous fat transfer (AFT) is an appropriate technique for aesthetic rejuvenation of the face, aesthetic enhancement of hands, correction of the facial appearance in various disorders and constitutes a surgical alternative of treatment of numerous breast deformities ranging from distorting posttraumatic scars, post-eczema lesions, post-burn deformities to partial or total breast reconstruction. Our work is aimed to familiarize dermatologists with the technique of harvesting and implanting the aspirate of adipose cells in patients consulted for deformities of the breast...
October 2016: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/27881075/modelling-microbial-metabolic-rewiring-during-growth-in-a-complex-medium
#17
Marco Fondi, Emanuele Bosi, Luana Presta, Diletta Natoli, Renato Fani
BACKGROUND: In their natural environment, bacteria face a wide range of environmental conditions that change over time and that impose continuous rearrangements at all the cellular levels (e.g. gene expression, metabolism). When facing a nutritionally rich environment, for example, microbes first use the preferred compound(s) and only later start metabolizing the other one(s). A systemic re-organization of the overall microbial metabolic network in response to a variation in the composition/concentration of the surrounding nutrients has been suggested, although the range and the entity of such modifications in organisms other than a few model microbes has been scarcely described up to now...
November 24, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27874016/mitochondrial-growth-during-the-cell-cycle-of-trypanosoma-brucei-bloodstream-forms
#18
Martin Jakob, Anneliese Hoffmann, Simona Amodeo, Camille Peitsch, Benoît Zuber, Torsten Ochsenreiter
Mitochondrial organelles need to be replicated during cell division. Many aspects of this process have been studied in great detail, however the actual size increase and the position of organelle growth are less well understood. We use the protozoan parasite Trypanosoma brucei that contains a single mitochondrion to study organelle biogenesis by fluorescence microscopy. From the analysis of more than 1000 T. brucei bloodstream form cells of a nonsynchronous population we conclude that the mitochondrial network mostly grows from two areas along the main organelle axis, posterior and anterior of the nucleus...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27873528/transplantation-of-vascularized-composite-allografts-review-of-current-knowledge
#19
M Molitor
Transplantation in reconstructive surgery has been performed for more than 20 years, although the official beginning of these procedures is considered the first successful transplantation of the hand in 1998. The original name "Composite Tissue Transplantation" has been used less frequently; more common is the term "Vascularized Composite Allotransplant", which better describes the basis of the procedure. There have been so far approximately 180 transplantations performed, the exact number is difficult to find...
2016: Acta Chirurgiae Plasticae
https://www.readbyqxmd.com/read/27872380/management-of-distal-tibial-metaphyseal-bone-defects-with-an-intramedullary-nitinol-scaffold-a-novel-technique
#20
Samuel E Ford, J Kent Ellington
: Difficult problems that are faced when reconstructing severe pilon fractures include filling metaphyseal defects and supporting an impacted, multifragmented articular surface. Supplements to plate fixation currently available in a surgeon's armamentarium include cancellous bone autograft, structural bone allograft, demineralized bone matrix, and calcium-based cements. Cancellous autograft possesses limited inherent mechanical stability and is associated with graft site morbidity. Structural allografts incorporate inconsistently and are plagued by late resorption...
November 20, 2016: Foot & Ankle Specialist
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