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https://www.readbyqxmd.com/read/28465028/the-technique-for-3d-printing-patient-specific-models-for-auricular-reconstruction
#1
Roberto L Flores, Hannah Liss, Samuel Raffaelli, Aiza Humayun, Kimberly S Khouri, Paulo G Coelho, Lukasz Witek
PURPOSE: Currently, surgeons approach autogenous microtia repair by creating a two-dimensional (2D) tracing of the unaffected ear to approximate a three-dimensional (3D) construct, a difficult process. To address these shortcomings, this study introduces the fabrication of patient-specific, sterilizable 3D printed auricular model for autogenous auricular reconstruction. METHODS: A high-resolution 3D digital photograph was captured of the patient's unaffected ear and surrounding anatomic structures...
April 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28421875/three-dimensional-printing-and-its-applications-in-otorhinolaryngology-head-and-neck-surgery
#2
Trevor D Crafts, Susan E Ellsperman, Todd J Wannemuehler, Travis D Bellicchi, Taha Z Shipchandler, Avinash V Mantravadi
Objective Three-dimensional (3D)-printing technology is being employed in a variety of medical and surgical specialties to improve patient care and advance resident physician training. As the costs of implementing 3D printing have declined, the use of this technology has expanded, especially within surgical specialties. This article explores the types of 3D printing available, highlights the benefits and drawbacks of each methodology, provides examples of how 3D printing has been applied within the field of otolaryngology-head and neck surgery, discusses future innovations, and explores the financial impact of these advances...
November 1, 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28350674/a-new-microtia-reconstruction-method-using-delayed-postauricular-skin-flap
#3
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
#4
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/28293505/accurate-measurements-of-the-skin-surface-area-of-the-healthy-auricle-and-skin-deficiency-in-microtia-patients
#5
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/28231373/auricular-complications-in-parotid-temporal-bone-infratemporal-fossa-and-lateral-skull-base-surgery
#6
Patrick S Carpenter, Ryan C Burgette, John P Leonetti, Sam J Marzo
Neoplasms located in the parotid region, temporal bone, infratemporal fossa, and lateral skull base represent a challenge due to their difficult anatomic location and surrounding neurovascular structures. A variety of surgical approaches are appropriate to access this area, although several of them can place the auricular blood supply in danger. If the auricular blood supply is compromised, ischemia and, eventually, avascular necrosis of the auricle can occur. Auricular necrosis often can cause patients a delay in adjuvant radiation therapy and result in the need for additional reconstructive procedures...
February 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28198774/a-new-classification-of-helix-fabrication-methods-with-autogenous-costal-cartilage-in-microtia-reconstruction
#7
Zhicheng Xu, Feng Xu, Ruhong Zhang, Qun Zhang, Datao Li, Yiyuan Li
BACKGROUND: Recreating the complex architecture of the auricle poses one of the most demanding challenges for the plastic surgeon. 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...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28170119/lateral-arm-free-tissue-transfer-for-parotid-reconstruction-a-pictorial-essay
#8
Stephen Y Kang, Matthew O Old, Theodoros N Teknos
BACKGROUND: The goals of parotid reconstruction are to provide accurate volume reconstruction of the defect while minimizing ptosis, optimize color match to surrounding facial skin, maintain anatomic position of the auricle, and to perform facial nerve rehabilitation in cases in which the facial nerve is removed. METHODS AND RESULTS: For many complex parotid defects, the lateral arm free tissue transfer achieves these reconstructive goals and is the ideal donor site for microvascular reconstruction...
February 7, 2017: Head & Neck
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
#9
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/28027200/vascular-supply-of-the-auricle-anatomical-study-and-applications-to-external-ear-reconstruction
#10
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
#11
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
#12
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
#13
Takashi Kurabayashi, Hirotaka Asato, Yasutoshi Suzuki, Nobuyuki Kaji, Yoko Mitoma
BACKGROUND: In two-stage procedures for reconstruction of microtia, an axial flap of temporoparietal fascia is widely used to cover the costal cartilage blocks placed behind the framework. Although a temporoparietal fascia flap is undoubtedly reliable, use of the flap is associated with 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 temporoparietal fascia...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27899950/bone-anchored-titanium-implants-in-patients-with-auricular-defects-three-years-and-27-patients-experience
#14
Emilio Mevio, Luca Facca, Stefano Schettini, Mauro Mullace
Different surgical solutions have been proposed for reconstruction of the auricle following loss of the pinna through traumatic injury or neoplastic disease or in patients with congenital defects. Surgical treatment may involve the insertion of an autogenous rib cartilage framework or the use of a porous polymer material inserted into an expanded postauricular flap. Reconstruction with rib cartilage has yielded good results but requires more than one surgical step, and adverse events can occur both at the donor and at the acceptor site; cases of prosthesis rejection have also been described following application of the polymeric prosthesis...
2016: International Journal of Otolaryngology
https://www.readbyqxmd.com/read/27834100/sound-lateralization-ability-of-patients-with-bilateral-microtia-and-atresia-after-bilateral-reconstruction-of-auricles-and-external-auditory-canals-and-fitting-of-new-canal-type-hearing-aids-to-replace-a-bone-conduction-hearing-aid
#15
Kimitaka Kaga, Hirotaka Asato
CONCLUSION: Each of eight patients with bilateral microtia and atresia underwent bilateral reconstruction of the auricles and external auditory canals and were fitted bilateral canal-type hearing aids in the operated ears to replace a bone conduction hearing aid. The ability to discriminate inter-aural intensity difference (IID) and even inter-aural time difference (ITD) was retained in all these patients. OBJECTIVE: This study studied the post-operative sound lateralization ability of patients with bilateral microtia and atresia after total reconstruction of both auricles and external auditory canals, followed by fitting of bilateral canal-type hearing aids...
November 11, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27765391/fabrication-of-postsurgical-auricle-separator-stent-in-reconstruction-of-the-ear
#16
Kumar C Pradeep, Shahid M A Mohammed, Mandavia Anisha
A natural appearing ear with appropriate projection from the head remains a great challenge in the reconstruction of the ear. Surgical and prosthetic means have been addressed in the management of patients with microtia, with each carrying its own merits and demerits. Lack of adequate projection of the ear and adhesion of tissues are some common complications of reconstructive surgery that can adversely affect the treatment outcome. This article describes a technique for the fabrication of a postsurgical stent to prevent adhesion of the surgically reconstructed ear to the underlying tissues...
April 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27755445/nasal-reconstruction-and-repair-of-secondary-nasal-deformities-following-treatment-of-nasal-hemangiomas
#17
Xiaona Lu, Fei Fan, Huan Wang, Jianjun You
BACKGROUND: Secondary nasal deformities and retardation of development due to treatment of nasal hemangioma during infancy are a challenge when it comes to nasal reconstruction. In order to evaluate nasal repair and reconstruction in these patients, the authors compared the ease and outcomes of using expanded forehead, nasolabial sulcus, and medial upper arm tube flaps. METHODS: According to the deformities and patients' wishes, flaps were selected; using autogeneic rib cartilage, auricle cartilage, or silica gel as a scaffold or without framework; the inner lining were made by the residual scar tissue or the distal end of transferred flap...
March 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27755426/bone-marrow-stem-cells-and-ear-framework-reconstruction
#18
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)...
October 14, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27726131/reevaluation-of-the-arterial-blood-supply-of-the-auricle
#19
Isaac Zilinsky, Detlev Erdmann, Oren Weissman, Niels Hammer, Mircea-Constantin Sora, Thilo L Schenck, Sebastian Cotofana
The anatomical basis for auricular flaps used in multiple aesthetic and reconstructive procedures is currently based on a random distribution of the underlying arterial network. However, recent findings reveal a systematic pattern as opposed to the present concepts. Therefore, we designed this study to assess the arterial vascular pattern of the auricle in order to provide reliable data about the vascular map required for surgical interventions. Sixteen human auricles from eight body donors (five females/three males, 84...
October 11, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27717980/quantitative-analysis-of-the-right-auricle-with-256-slice-computed-tomography
#20
Cai-Ying Li, Bu-Lang Gao, Tong Pan, Cheng Xiang, Xue-Jing Zhang, Xiao-Wei Liu, Qiong-Ying Fan
PURPOSE: To quantitatively measure the morphology parameters of the right auricle with 256-slice multidetector computed tomography angiography (MDCTA) in healthy people. MATERIALS AND METHODS: A retrospective analysis of 200 patients who had undergone coronary MDCTA with negative findings was performed. The raw imaging data were reconstructed and the right auricular volume, right atrial volume, right auricle height, base long and short axes, base perimeter and area, normal angle, and distance were quantitatively measured...
October 7, 2016: Surgical and Radiologic Anatomy: SRA
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