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Ear reconstruction

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https://www.readbyqxmd.com/read/28092905/endocranial-morphology-of-the-extinct-north-american-lion-panthera-atrox
#1
Andrew R Cuff, Christopher Stockey, Anjali Goswami
The extinct North American lion (Panthera atrox) is one of the largest felids (Mammalia, Carnivora) to have ever lived, and it is known from a plethora of incredibly well-preserved remains. Despite this abundance of material, there has been little research into its endocranial anatomy. CT scans of a skull of P. atrox from the Pleistocene La Brea Tar pits were used to generate the first virtual endocranium for this species and to elucidate previously unknown details of its brain size and gross structure, cranial nerves, and inner-ear morphology...
January 17, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/28091665/trace-element-protein-interactions-in-endolymph-from-the-inner-ear-of-fish-implications-for-environmental-reconstructions-using-fish-otolith-chemistry
#2
Oliver R B Thomas, Katherine Ganio, Blaine R Roberts, Stephen E Swearer
Otoliths, the biomineralised hearing "ear stones" from the inner ear of fish, grow throughout the lifespan of an individual, with deposition of alternating calciferous and proteinaceous bands occurring daily. Trace element : calcium ratios within daily increments measured by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) are often used in fisheries science to reconstruct environmental histories. There is, however, considerable uncertainty as to which elements are interacting with either the proteinaceous or calciferous zones of the otolith, and thus their utility as indicators of environmental change...
January 16, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28079699/a-new-technique-for-total-reconstruction-of-the-lower-lid
#3
Mehmet Mutaf, Metin Temel
BACKGROUND: Although several methods have been described for total lower eyelid reconstruction, it remains as a major challenge in reconstructive surgery. Here, we present a new technique, the Mutaf unequal Z-plasty procedure for reconstruction of defects of the lower eyelid. METHODS: In this technique, 2 skin flaps designed in an unequal Z-plasty manner are used to provide skin coverage. Except for 2 patients whose additional upper eyelid defects were closed with Fricke flap, all patients were reconstructed with Mutaf unequal Z-plasty procedure...
February 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28079680/middle-ear-sound-transmission-under-normal-damaged-repaired-and-reconstructed-conditions
#4
Wei Dong, Ying Tian, Xin Gao, Timothy T K Jung
HYPOTHESIS: We hypothesize that current clinical treatment strategies for the disarticulated or eroded incus have the effect of combining the incus and stapes of the human middle ear (ME) into one rigid structure, which, while capable of adequately transmitting lower-frequency sounds, fails for higher frequencies. BACKGROUND: ME damage causes conductive hearing loss (CHL) and while great progress has been made in repairing or reconstructing damaged MEs, the outcomes are often far from ideal...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28072657/assessment-of-cochlea-endolymphatic-hydrops-using-3-d-flair-and-3-d-real-ir-sequence-in-guinea-pigs-via-3t-mri-after-intratympanic-gadolinium-a-histopathological-comparison
#5
Feng Wang, Huiying Lyu, Menglong Zhao, Yan Sha, Fang Zhang, Yushu Cheng, Wenhu Huang, Wenlin Tang, Youzhou Xie, Ping Lu
OBJECTIVE: We assessed whether the three-dimensional fluid-attenuated inversion-recovery (3-D FLAIR) and three-dimensional inversion-recovery with real reconstruction (3-D real IR) sequences can be used to detect cochlea endolymphatic hydrops (EHs) in guinea pigs using 3 Tesla magnetic resonance imaging (3T MRI). The results of 3-D real IR imaging were compared with histopathological outcomes. MATERIALS AND METHODS: Fourteen healthy men and women albino guinea pigs were used in this study...
January 9, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28065228/comparison-of-the-ambu-aura-i-with-the-air-q-intubating-laryngeal-airway-as-a-conduit-for-fiberoptic-guided-tracheal-intubation-in-children-with-ear-deformity
#6
Juan Zhi, Xiao-Ming Deng, Dong Yang, Chao Wen, Wen-Li Xu, Lei Wang, Jin Xu
Objective To compare the Ambu Aura-i with the Air-Q intubating laryngeal airway for fiberoptic-guided tracheal intubation in ear deformity children.Methods Totally 120 children who were scheduled for elective auricular reconstruction surgery requiring general anaesthesia with tracheal intubation were enrolled in this prospective study. They were randomized to receive either the Ambu Aura-i (Aura-i group) or Air-Q (Air-Q group). The time for successful tracheal intubation was assessed. The attempts for successful device insertion, leak pressures, cuff pressures, fiberoptic grade of laryngeal view, time for removal of the device after endotracheal intubation, and complications were recorded...
December 20, 2016: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28062966/the-existence-of-a-natural-plica-at-the-anatomical-base-of-the-antihelix-and-its-surgical-importance-to-address-protruding-ears-an-anatomicosurgical-study
#7
Miguel Marques Oliveira, Daniel Sousa Marques Oliveira, Gustavo Sousa Marques Oliveira
BACKGROUND: Protruding ears represent the main abnormality of the external ear, which has required numerous anatomic and surgical studies. Most studies give attention to the absence of the antihelix as the anatomic defect responsible for the clinical deformity of the lateral aspect of the ear that leads to its anteversion. The reason for this study is the controversial origin of the fold of the antihelix within the auricle framework, a field of interest for aesthetic otoplasty. The current study examined the medial surface of the cartilaginous ear frame from cadaver specimens with right morphology to investigate the starting point of the fold of the antihelix...
January 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28051766/distribution-of-neurosensory-progenitor-pools-during-inner-ear-morphogenesis-unveiled-by-cell-lineage-reconstruction
#8
Sylvia Dyballa, Thierry Savy, Philipp Germann, Karol Mikula, Mariana Remesikova, Róbert Špir, Andrea Zecca, Nadine Peyriéras, Cristina Pujades
Reconstructing the lineage of cells is central to understanding how the wide diversity of cell types develops. Here, we provide the neurosensory lineage reconstruction of a complex sensory organ, the inner ear, by imaging zebrafish embryos in vivo over an extended timespan, combining cell tracing and cell fate marker expression over time. We deliver the first dynamic map of early neuronal and sensory progenitor pools in the whole otic vesicle. It highlights the remodeling of the neuronal progenitor domain upon neuroblast delamination, and reveals that the order and place of neuroblasts' delamination from the otic epithelium prefigure their position within the SAG...
January 4, 2017: ELife
https://www.readbyqxmd.com/read/28041938/patient-reported-outcome-measures-in-microtia-surgery
#9
REVIEW
Farhana Akter, Joanna C Mennie, Ken Stewart, Neil Bulstrode
BACKGROUND: Autologous ear reconstruction for microtia is a complex, multi-stage procedure. The success of the procedure is dependant on how the patient perceives the outcomes of surgery and their overall experience. Patient reported measures are therefore crucial to developing the technique and improving the patient journey. AIM: The aim of this study was to use two reproducible patient reported outcome tools as an objective measure of microtia reconstructive surgery...
November 23, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28034635/patient-specific-bone-mineral-density-distribution-in-the-tibia-of-individuals-with-chronic-spinal-cord-injury-derived-from-multi-slice-peripheral-quantitative-computed-tomography-pqct-a-cross-sectional-study
#10
Sylvie Coupaud, Magnus K Gislason, Mariel Purcell, Keisuke Sasagawa, K Elizabeth Tanner
BACKGROUND: The high risk of fracture associated with chronic spinal cord injury (SCI) is attributed to extensive disuse-related bone loss in previously weight-bearing long bones. Changes in bone mineral density (BMD) after SCI have been documented extensively for the epiphyses of the tibia and femur, fracture-prone sites in this patient group. Less attention has been given to patterns of cortical bone loss in the diaphyses, but variability in BMD distributions throughout the long bones may contribute to some patients' increased susceptibility to shaft fractures in chronic SCI...
December 26, 2016: Bone
https://www.readbyqxmd.com/read/28032171/iatrogenic-through-and-through-conchal-defect-secondary-to-auricular-cartilage-graft
#11
Hyung-Suk Ro, Si-Gyun Roh, Jin Yong Shin, Nae-Ho Lee, Kyung-Moo Yang
BACKGROUND: Over the past few years, conchal cartilage has been most often used in rhinoplasty. The donor site complications following conchal cartilage graft harvesting are scar formation, hematoma formation, and delayed wound healing, although hematoma is one of the most important and common complications. A complete conchal defect as a complication of auricular cartilage graft harvesting has not been previously reported in the literature. The authors report an unusual case of an iatrogenic conchal defect resulting from conchal cartilage graft harvesting that was treated using a posterior auricular island flap...
December 28, 2016: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28032165/an-alternative-posterosuperior-auricular-fascia-flap-for-ear-elevation-during-microtia-reconstruction
#12
Yiyuan Li, Ruhong Zhang, Qun Zhang, Zhicheng Xu, Feng Xu, Datao Li
BACKGROUND: Advances in staged total auricular reconstruction have resulted in improved anterior auricular appearance; however, satisfactory postreconstruction esthetics of the retroauricular fold remain challenging. The postauricular appearance of the reconstructed ear depends largely upon optimizing the covering material. When used as the covering soft tissue for ear elevation, a flap containing primarily the upper portion of the retroauricular fascia has potential advantages over the conventional book cover-type retroauricular fascia flap...
December 28, 2016: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28027200/vascular-supply-of-the-auricle-anatomical-study-and-applications-to-external-ear-reconstruction
#13
Michaël Hénoux, Florent Espitalier, Antoine Hamel, Brigitte Dréno, Guillaume Michel, Olivier Malard
BACKGROUND: Reliable reconstructive flaps require convenient vascular supply. Thus, precise description of the vascular patterns of external ear is not completely elucidated. OBJECTIVE: This anatomical study aims to provide comprehensive data of the arterial network of the auricular region, anastomosis, and patterns of arterial dependence regarding external ear subunits. MATERIALS AND METHODS: After dyed latex injections in the external carotid artery, eleven auricles have been carefully dissected to examine the vascular network of the auricular region...
January 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28010030/-basics-of-ear-surgery
#14
S Lailach, T Zahnert
The present article about the basics of ear surgery is a short overview of current indications, the required diagnostics and surgical procedures of common otologic diseases. In addition to plastic and reconstructive surgery of the auricle, principles of surgery of the external auditory canal, basics of middle ear surgery and the tumor surgery of the temporal bone are shown. Additionally, aspects of the surgical hearing rehabilitation (excluding implantable hearing systems) are presented considering current study results...
December 2016: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28005788/bone-marrow-stem-cells-and-ear-framework-reconstruction
#15
Hamid Karimi, Seyed-Abolhassan Emami, Mohammad-Kazem Olad-Gubad
BACKGROUND: Repair of total human ear loss or congenital lack of ears is one of the challenging issues in plastic and reconstructive surgery. OBJECTIVE: The aim of the present study was 3D reconstruction of the human ear with cadaveric ear cartilages seeded with human mesenchymal stem cells. METHOD: We used cadaveric ear cartilages with preserved perichondrium. The samples were divided into 2 groups: group A (cartilage alone) and group B (cartilage seeded with a mixture of fibrin powder and mesenchymal stem cell [1,000,000 cells/cm] used and implanted in back of 10 athymic rats)...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28002245/a-temporoparietal-fascia-pocket-method-in-elevation-of-reconstructed-auricle-for-microtia
#16
Takashi Kurabayashi, Hirotaka Asato, Yasutoshi Suzuki, Nobuyuki Kaji, Yoko Mitoma
BACKGROUND: In the two-stage procedures for the reconstruction of microtia, an axial flap of temporoparietal fascia (TPF) is widely used to cover the costal cartilage blocks placed behind the framework. Although a TPF flap is undoubtedly reliable, use of the flap has some morbidity and comes at the expense of the option for salvage surgery. METHODS: The authors devised a simplified procedure for covering the cartilage blocks by creating a pocket in the postauricular TPF...
December 19, 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27987254/application-of-free-serratus-anterior-fascial-flap-for-reconstruction-of-ear-deformity-due-to-hemifacial-microsomia-a-report-of-two-cases
#17
Takashi Nuri, Koichi Ueda, Akira Yamada
Reconstructing congenital auricular defects due to hemifacial microsomia (HFM) is often required to deal with low hairline and defects of the temporal fascia/muscular systems. In this report, we present two cases of HFM patients (16-year-old and 20-year-old) with positional anomaly of the remnant lobule and 95% low hairline, who were treated with serratus anterior fascial flap (SFF) at the second stage of auricular construction. At the first stage, 3D costal cartilage framework was placed following the removal of hair-bearing skin, and was resurfaced with the pericranial flap...
December 17, 2016: Microsurgery
https://www.readbyqxmd.com/read/27932858/one-stage-bone-strip-reconstruction-technique-with-balloon-sinus-dilatation-surgery-for-chronic-maxillary-atelectasis
#18
Tomoyuki Kashima, Robert A Goldberg, Jocelyne C Kohn, Daniel B Rootman
PURPOSE: Chronic maxillary atelectasis is characterized by unilateral spontaneous enophthalmos and hypoglobus due to increased orbital volume secondary to maxillary sinus inward deformation. Reformation of the sinus architecture and reconstruction of the orbit are key to a successful outcome. Here, we introduce a one-staged surgery that addresses both these goals. PATIENTS AND METHODS: We retrospectively reviewed 11 patients treated with one-stage orbital and sinus surgery...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27917821/optimizing-cell-sourcing-for-clinical-translation-of-tissue-engineered-ears
#19
Kerry A Morrison, Benjamin P Cohen, Ope Asanbe, Xue Dong, Alice Harper, Lawrence J Bonassar, Jason A Spector
: Background . Currently, the major impediment to clinical translation of our previously described platform for the fabrication of high fidelity, patient-specific tissue engineered ears is the development of a clinically optimal cell sourcing strategy. A limited autologous auricular chondrocyte (AuC) supply in conjunction with rapid chondrocyte de-differentiation during in vitro expansion currently makes clinical translation more challenging. Mesenchymal stem cells (MSCs) offer significant promise due to their inherent chondrogenic potential, and large availability through minimally invasive procedures...
December 5, 2016: Biofabrication
https://www.readbyqxmd.com/read/27917790/retrospective-air-bone-gap-evaluation-of-patients-with-tympanic-membrane-central-perforation
#20
Levent Küçükkavruk, Esra Temügan, Mesut Kaya, Selim Unsal, Nebi Mustafa Gumus, Mustafa Yüksel, Mehmet Gündüz
PURPOSE: The purpose of this study was to evaluate hearing recovery and air-bone gap (ABG) before and after tympanoplasty surgery in patients with tympanic membrane central perforation. METHODS: Histories and audiological assessments of 160 cases (total of 26 ears from 22 patients; 11 men and 11 women) from patients who had undergone tympanoplasty surgery and hearing reconstruction due to tympanic membrane central perforation were evaluated. Pre-postoperative audiograms and the pure tone, air-bone hearing thresholds and ABG gains were evaluated...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
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