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Auricular cartilage

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https://www.readbyqxmd.com/read/28430334/chondro-keratoprosthesis-an-alternative-to-ookp
#1
Louis Hoffart, Laurent Guyot
PURPOSE: To evaluate the use of cartilage as a potential graft material toward osteo-odontal tissue replacement in keratoprosthesis surgery. METHODS: We describe a modification of the osteo-odonto-keratoprosthesis surgery that involves the use of autologous auricular conchal cartilage graft (ACCG). In stage 1a, a full-thickness cheek mucosa graft was performed over the ocular surface. In stage 1b, ACCG was harvested via a retroauricular approach. An optical polymethyl-methacrylate cylinder was embedded into a double-layered fragment of cartilage and secured by cyanoacrylate glue...
April 4, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28396871/innervation-of-the-human-cavum-conchae-and-auditory-canal-anatomical-basis-for-transcutaneous-auricular-nerve-stimulation
#2
P Bermejo, M López, I Larraya, J Chamorro, J L Cobo, S Ordóñez, J A Vega
The innocuous transcutaneous stimulation of nerves supplying the outer ear has been demonstrated to be as effective as the invasive direct stimulation of the vagus nerve for the treatment of some neurological and nonneurological disturbances. Thus, the precise knowledge of external ear innervation is of maximal interest for the design of transcutaneous auricular nerve stimulation devices. We analyzed eleven outer ears, and the innervation was assessed by Masson's trichrome staining, immunohistochemistry, or immunofluorescence (neurofilaments, S100 protein, and myelin-basic protein)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28352607/a-new-technique-for-conchal-cartilage-harvest
#3
Joon Young Kim, Ho Jik Yang, Ji Won Jeong
The goal of auricular cartilage harvest is to obtain a sufficient amount for reconstruction and to minimize the change in ear shape. The cartilage can be harvested by a posterior or anterior approach, and each method has advantages and disadvantages. The posterior approach presents the advantage of scar concealment, but there are limits to the amount of cymba cartilage that may be harvested. In contrast, the anterior approach may cause a noticeable scar. However, as cartilage is collected, the anterior approach provides a view that facilitates the preservation ear structure...
March 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28350674/a-new-microtia-reconstruction-method-using-delayed-postauricular-skin-flap
#4
Gaofeng Li, Fan Zhang, Wei Ding, Zihan Wu, Yigao Hu, Tao Luo, Bo Zhang, Xia Jiang
BACKGROUND: This article presents a new microtia reconstruction method using a delayed postauricular skin flap. METHODS: The surgery is scheduled in three stages, the first of which delays the postauricular skin flap and deals with the remnant auricle. Three weeks later, the second stage is carried out. An erect, three-dimensional ear framework fabricated from autogenous rib cartilage is inserted between two flaps. The anterior auricular surface of the framework is draped with the delayed skin flap, and the postauricular surface is draped with postauricular fascia and overlying grafted skin...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28350666/long-term-comparison-between-human-normal-conchal-and-microtia-chondrocytes-regenerated-by-tissue-engineering-on-nanofiber-polyglycolic-acid-scaffolds
#5
Hitomi Nakao, Robin D Jacquet, Mark Shasti, Noritaka Isogai, Ananth S Murthy, William J Landis
BACKGROUND: Previous regeneration studies of auricle-shaped cartilage by tissue engineering leave unresolved whether the chondrocyte phenotype from human auricular chondrocytes seeded onto polymeric scaffolds is retained over the long term and whether microtia remnants may be a viable cell source for auricular reconstruction. METHODS: Chondrocytes were isolated from human ears, either normal conchal ear or microtia cartilage remnants, expanded in vitro, and seeded onto nanoscale-diameter polyglycolic acid sheets...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28341947/the-versatile-posterior-auricular-fascia-in-secondary-rhinoplasty-procedures
#6
Darryl James Hodgkinson, Pedro Miguel Valente
BACKGROUND: Secondary rhinoplasty often involves the addition of autogenous graft material to add volume, structure, support and to camouflage cartilage and bone grafts. A variety of fascias have been used to camouflage, wrap and give "fill" in secondary rhinoplasty. The posterior auricular fascia is a source of material ideal for such purposes, and its quantity, anatomical structure and ease of harvest with minimal donor site morbidity make it a versatile and attractive autogenous graft...
March 24, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28293505/accurate-measurements-of-the-skin-surface-area-of-the-healthy-auricle-and-skin-deficiency-in-microtia-patients
#7
Iris A Otto, Rob F M van Doremalen, Ferry P W Melchels, Michail N Kolodzynski, Behdad Pouran, Jos Malda, Moshe Kon, Corstiaan C Breugem
BACKGROUND: The limited cranial skin covering auricular implants is an important yet underrated factor in auricular reconstruction for both reconstruction surgery and tissue engineering strategies. We report exact measurements on skin deficiency in microtia patients and propose an accessible preoperative method for these measurements. METHODS: Plaster ear models (n = 11; male:female = 2:1) of lobular-type microtia patients admitted to the University Medical Center Utrecht in The Netherlands were scanned using a micro-computed tomographic scanner or a cone-beam computed tomographic scanner...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28280656/noninvasive-measurement-of-ear-cartilage-elasticity-on-the-cellular-level-a-new-method-to-provide-biomechanical-information-for-tissue-engineering
#8
Ernst Jan Bos, Koen van der Laan, Marco N Helder, Margriet G Mullender, Davide Iannuzzi, Paul P van Zuijlen
BACKGROUND: An important feature of auricular cartilage is its stiffness. To tissue engineer new cartilage, we need objective tools to provide us with the essential biomechanical information to mimic optimal conditions for chondrogenesis and extracellular matrix (ECM) development. In this study, we used an optomechanical sensor to investigate the elasticity of auricular cartilage ECM and tested whether sensitivity and measurement reproducibility of the sensor would be sufficient to accurately detect (subtle) differences in matrix compositions in healthy, diseased, or regenerated cartilage...
February 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28272149/plasticity-of-auricular-cartilage-in-response-to-hormone-therapy
#9
Patrick S Cottler, Matthew D McLeod, Jesse L Payton, Angela Pineros-Fernandez, Jonathan S Black
INTRODUCTION: Correction of auricular deformities can be accomplished through splinting within the first few weeks of life. This is hypothesized to be due to retained circulating maternal estrogens decreasing the structural density of collagen; however, this has not been fully tested. Cartilage elasticity is dependent on the concentration of the proteoglycan aggregate, and hyaluronic acid, a constituent of proteoglycan aggregate, is increased by estrogens. Nonsurgical correction of these deformities in more developed patients has the potential to change clinical practice and eliminate surgical risks...
March 7, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28266051/relapsing-polychondritis-associated-with-psoriasis-vulgaris-successfully-treated-with-adalimumab-a-case-report-with-published-work-review
#10
Haruka Matsuo, Akihiko Asahina, Takeshi Fukuda, Yoshinori Umezawa, Hidemi Nakagawa
Relapsing polychondritis (RP) is a rare autoimmune-mediated disease characterized by inflammation involving cartilaginous tissues. We report here a case of RP in a 38-year-old Japanese man with 13-year duration of psoriasis vulgaris treated with topical steroids and vitamin D3 . The patient presented with tender swelling and erythema of both auricles, and the antibody to type II collagen was detected. The biopsy specimen revealed a dense mixed cell infiltration over the auricular cartilage. We reviewed eight cases with the association of RP and psoriasis, and in all cases the clinical course of psoriasis did not correlate with that of RP...
March 7, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28209412/injectable-chondroplasty-enzymatic-reshaping-of-cartilage-grafts
#11
J R Gandy, A Foulad, K K Chao, B J F Wong
OBJECTIVE/HYPOTHESIS: To develop an injection-based enzymatic technique that selectively softens cartilage tissue for reshaping cartilaginous structures in the head and neck. MATERIALS AND METHODS: Two groups were formed using fresh rabbit ears: (1) whole rabbit ear group; (2) composite graft group (2.5mm×3.0cm specimens sectioned from the central region of the pinna). Subperichondrial injections using three enzymes (hyaluronidase, pronase, and collagenase II) in sequence were performed for the experimental specimens from both groups...
February 10, 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28198774/a-new-classification-of-helix-fabrication-methods-with-autogenous-costal-cartilage-in-microtia-reconstruction
#12
Zhicheng Xu, Feng Xu, Ruhong Zhang, Qun Zhang, Datao Li, Yiyuan Li
BACKGROUND: The complex architecture of the auricle poses one of the most demanding challenges for the plastic surgeon to recreate. The fabrication of the prominent helix is crucial to the final contour of the constructed ear. The success of helix carving depends greatly on the complicated characteristics of the cartilage used, which is commonly the eighth costal cartilage. The authors elaborate on the relevant details for helix sculpting based on different qualities of cartilage. METHODS: A series of 415 microtia patients underwent autogenous costal cartilage auricular reconstruction between 2012 and 2015...
February 13, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28121861/what-is-the-lobular-branch-of-the-great-auricular-nerve-anatomical-description-and-significance-in-rhytidectomy
#13
Vicki S Sharma, Robert E Stephens, Barth W Wright, Christopher C Surek
BACKGROUND: Current literature suggests that preserving the lobular branch of the great auricular nerve has greater impact on sensory function of the auricle than preservation of the posterior branch during rhytidectomy. However, no methodology exists to efficiently and accurately determine the topographic location of the lobular branch. This study describes the branching characteristics of the lobular branch and algorithmic surface markings to assist surgeons in preservation of the great auricular nerve during rhytidectomy flap elevation...
February 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28063220/biological-roles-of-glial-fibrillary-acidic-protein-as-a-biomarker-in-cartilage-regenerative-medicine
#14
Sanshiro Kanazawa, Satoru Nishizawa, Tsuyoshi Takato, Kazuto Hoshi
Glial fibrillary acidic protein (GFAP) is an intermediate filament that is expressed in specifically expressed auricular chondrocytes, which are good cell sources of cartilage regenerative medicine. Although our group uses GFAP as a biomarker of matrix production in the cultured auricular chondrocytes, the biological roles of GFAP in auricular chondrocytes has remained unknown. In this study, we demonstrated the biological functions of GFAP in the human and mouse derived auricles to clarify the significance and role with the chondrocytes of GFAP in order to provide useful information for reliable and safe regenerative medicine...
January 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28032171/iatrogenic-through-and-through-conchal-defect-secondary-to-auricular-cartilage-graft
#15
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...
February 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/27990114/sparing-surgery-for-the-successful-treatment-of-thyroid-papillary-carcinoma-invading-the-trachea-a-case-report
#16
Denis Kulbakin, Timofey Chekalkin, Marat Muhamedov, Evgeniy Choynzonov, Ji-Hoon Kang, Seung-Baik Kang, Victor Gunther
Published reports on salvage treatment for trachea reconstruction after total thyroidectomy or partial tracheotomy are available, some of them using structures of the trachea itself, auricular cartilage, a musculocutaneous flap, or other methods. In our report, we emphasize the importance of a search for a new material and approach for sparing surgery. The purpose of this article is to describe a case of a successful sparing surgery in a patient with advanced thyroid papillary carcinoma invading the trachea...
September 2016: Case Reports in Oncology
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/27930470/correction-of-lying-ears-by-augmentation-of-the-conchoscaphal-angle
#18
Sung-Eun Kim, Chi-Ho Yeo, Taegon Kim, Yong-Ha Kim, Jun Ho Lee, Kyu-Jin Chung
Lying ears are defined as ears that protrude less from the head, and in frontal view, are characterized by lateral positioning of antihelical contour relative to the helical rim. These aesthetically displeasing ears require correction in accord with the goals of otoplasty stated by McDowell. The authors present a case of lying ears treated by correcting the conchomastoid angle using Z-plasty, resection of posterior auricular muscle, and correction of the conchoscaphal angle by releasing cartilage using 2 full-thickness incisions and grafting of a conchal cartilage spacer...
January 2017: Journal of Craniofacial Surgery
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/27903413/fenestration-of-auricular-cartilage-grafts-to-aid-healing-of-alar-wounds-by-secondary-intention
#20
A M Flynn, R B M Barry
No abstract text is available yet for this article.
April 2017: British Journal of Oral & Maxillofacial Surgery
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