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Ear reconstruction

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https://www.readbyqxmd.com/read/29055244/a-pilot-study-comparing-mechanical-properties-of-tissue-engineered-cartilages-and-various-endogenous-cartilages
#1
Andrew K Pappa, Sajjad Soleimani, Montserrat Caballero, Alexandra E Halevi, John A van Aalst
BACKGROUND: Mechanical properties of tissue-engineered cartilage and a variety of endogenous cartilage were measured. The main goal was to evaluate if the tissue-engineered cartilage have similar mechanical characteristics to be replaced with rib cartilage in microtia reconstruction. Such study lays the foundation for future human clinical trials for microtia reconstruction. METHOD: Atomic force microscopy and compression testing were used to measure the viscoelasticity of tissue-engineered cartilage (stem cell seeded on Poly lactic co-glycolytic acid nanofibers and Pellet) and endogenous cartilage: conchal bowl, microtic ears, preauricular remnants, and rib...
October 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29050095/-revisional-radical-mastoidectomy-surgeries-25-cases-experience
#2
L Li, J Xie, Y Liu, S S Gong
Objective: To analyze the risk factors of failure to dry ear after radical mastoidectomy and discuss key points in revisonal surgery. Methods: Clinical data of 25 patients(32 ears) with revisonal mastoidectomy were analyzed. The preoperative temporal bone CT findings, intra-operative findings, surgical procedures, postoperative operating cavities and aural abilities were recorded and analyzed. Results: All patients received preoperative temporal bone CT followed by revisonal radical mastoidectomy under microscope and general anesthesia...
October 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29042574/size-variation-under-domestication-conservatism-in-the-inner-ear-shape-of-wolves-dogs-and-dingoes
#3
Anita V Schweizer, Renaud Lebrun, Laura A B Wilson, Loïc Costeur, Thomas Schmelzle, Marcelo R Sánchez-Villagra
A broad sample of wolves, dingoes, and domesticated dogs of different kinds and time periods was used to identify changes in size and shape of the organs of balance and hearing related to domestication and to evaluate the potential utility of uncovered patterns as markers of domestication. Using geometric morphometrics coupled with non-invasive imaging and three-dimensional reconstructions, we exposed and compared complex structures that remain largely conserved. There is no statistically significant difference in the levels of shape variation between prehistoric and modern dogs...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29040358/tissue-expansion-using-hyaluronic-acid-filler-for-single-stage-ear-reconstruction-a-novel-concept-for-difficult-areas
#4
Amir Inbal, Benjamin T Lemelman, Eran Millet, Andrew Greensmith
Background: Auricular reconstruction is one of the most challenging procedures in plastic surgery. An adequate skin envelope is essential for cartilage framework coverage, yet few good options exist without additional surgery. We propose a novel method for minimally invasive tissue expansion, using hyaluronic acid (HA) filler to allow for single-stage ear reconstruction. Objectives: To introduce the novel concept of HA filler for tissue expansion in ear reconstruction, and as an alternative to traditional expansion techniques...
July 20, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29031526/the-temporal-artery-island-flap-a-good-reconstructive-option-for-small-to-medium-sized-facial-defects
#5
Said Algan, Murat Kara, Hakan Cinal, Ensar Zafer Barin, Akin Inaloz, Onder Tan
PURPOSE: The reconstruction of facial defects is esthetically vital because of the unique skin color and texture of the face. The aim of this study was to show the utility of different temporal artery island flap designs for the reconstruction of upper and middle facial defects without contrast to the color and texture of the face. MATERIALS AND METHODS: This study is retrospective case series conducted from November 2004 through May 2015. Patients older than 18 years with upper and middle facial defects smaller than 5 cm were included...
September 19, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29026816/aesthetic-refinements-in-forehead-flap-reconstruction-of-the-asian-nose
#6
Yen-Chang Hsiao, Chun-Shin Chang, Jonathan Zelken
BACKGROUND: Traditional paramedian forehead flap reconstruction exploits the aesthetic subunit principle. Refinements and outcomes of forehead flap nasal reconstruction largely reflect Western experience. Differences in ethnic Asian anatomy and wound healing may foster suboptimal outcomes. We modified methods to address Asian features by extending subunit and flap boundaries, minimizing flap thinning, and overbuilding the nasal framework to combat contraction and suboptimal scarring. METHODS: Between November 2010 and September 2015, 40 Asians were treated for nasal reconstruction with a modified forehead flap technique...
May 2017: Plastic Surgery
https://www.readbyqxmd.com/read/29017231/-long-term-follow-up-and-patient-satisfaction-after-tympanoplasty-with-titanium-clip-prothesis
#7
Guido Wolferts, Daniel Schicke, K-Wolfgang Delank
Aim of the present study is to evaluate the long term results of ossiculoplasty using titanium clip prosthesis. A retrospective analysis with prospective follow-up has been done including for all patients who had a Clip-PORP implanted between the years 2002-2013. Following this, audiometric hearing results were measured with clinical examination including otoscopy and quality of life evaluation using Glasgow benefit inventory. 48 patients (51 ears, 29 men, 19 women, average age 44.1 years) received followed up after an average duration of 6...
October 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28994723/middle-ear-prosthesis-with-bactericidal-efficacy-in-vitro-investigation
#8
Magdalena Ziąbka, Michał Dziadek, Elżbieta Menaszek, Rafał Banasiuk, Aleksandra Królicka
Materials used in ossicular replacement prostheses must possess appropriate biological properties, such as biocompatibility, stability, no cytotoxicity. Due to the risk of infection (otitis media and chronic otitis media), it is desirable to use an antibacterial agent for illness prevention during the ossicular reconstruction. The goal of this work was to observe biological properties of a new composite prosthesis made of ABS containing silver nanoparticles (AgNPs 45T). Samples for biological tests and then a prototype of middle ear prosthesis were prepared using injection moulding and extrusion techniques...
October 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28988463/evidence-against-the-mucosal-traction-theory-in-cholesteatoma
#9
Henrique F Pauna, Rafael C Monsanto, Patricia Schachern, Michael M Paparella, Richard A Chole, Sebahattin Cureoglu
OBJECTIVES: To investigate the distribution of ciliated epithelium in the human middle ear and its potential role in the formation of cholesteatoma. STUDY DESIGN: Comparative human temporal bone study. METHODS: We selected temporal bones from 14 donors with a diagnosis of cholesteatoma, 15 with chronic otitis media without retraction pockets, 14 with chronic otitis media with retraction pockets, 14 with cystic fibrosis (CF), and 16 controls...
October 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28984809/otology-at-the-academy-of-gondishapur-200-600-ce
#10
Robert J Ruben
OBJECTIVE: To investigate the way in which otology was practiced at the Academy of Gondishapur in ancient Persia from 200 to 600 CE. METHOD: The pertinent literature, using German and English translations of Latin, Greek, Arabic, and Sanskrit documents, was identified and reviewed through the indices of available books and through a PDF search for the following topics: auricle, deaf, deafness, dizziness, ear, hearing, medicine, otitis, pinna, punishment-ear, speech, surgery, vertigo, and voice...
October 4, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28984657/osseointegrated-prosthetic-ear-reconstruction-in-cases-of-skin-malignancy-technique-outcomes-and-patient-satisfaction
#11
Cori A Agarwal, Dana Johns, Paul B Tanner, Robert H I Andtbacka
BACKGROUND: Ear reconstruction with osseointegrated prosthetic implants is a well-established method of reconstruction after resection of skin malignancies on the external ear. There is limited literature reporting technique, outcomes, and patient satisfaction. METHODS: We evaluated our outcomes over a 5-year period looking at osseointegrated prosthetic reconstruction after auriculectomy for external ear skin malignancies. We report demographics, disease characteristics, technique, and complications...
October 3, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28981156/reconstruction-of-a-near-total-ear-amputation-with-a-neurosensorial-radial-forearm-free-flap-prelaminated-with-porous-polyethylene-implant-and-delay-procedure
#12
Ricardo Horta, Rita Valença-Filipe, Jorge Carvalho, Ricardo Nascimento, Alvaro Silva, Jose Amarante
When an auricular defect is caused by high-energy trauma that causes damage to the surrounding tissues, the patient may be not a candidate for reconstruction with local flaps and free tissue transfer may be necessary. Here we present a case of total auricular reconstruction in a 27 year-old man who had total loss of the left ear and traumatized temporal skin and fascia. A radial forearm flap prelaminated by a porous polyethylene implant was employed. A "printed" ear made of silicone, based on the patient's CT-scan of the contralateral ear, was used for intraoperative molding of the future reconstruction...
October 5, 2017: Microsurgery
https://www.readbyqxmd.com/read/28964300/anatomical-measurement-of-the-ossicles-in-patients-with-congenital-aural-atresia-and-stenosis
#13
Jieying Li, Keguang Chen, Chenlong Li, Dongming Yin, Tianyu Zhang, Peidong Dai
OBJECTIVES: Our aims were to measure and compare anatomical parameters of the ossicles in normal, congenital aural stenosis (CAS), and congenital aural atresia (CAA) ears. METHODS: This retrospective study was performed using three-dimensional reconstructed images derived from computed tomography scans of 20 normal subjects, 20 CAS patients, and 20 CAA patients. RESULTS: The lengths of the malleus handle and long process of the incus were greater in normal ears than in CAS and CAA ears (all P < 0...
October 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28951962/saccular-measurements-in-routine-mri-can-predict-hydrops-in-meni%C3%A3-re-s-disease
#14
François Simon, Jean-Pierre Guichard, Romain Kania, Julie Franc, Philippe Herman, Charlotte Hautefort
Most patients with suspicion of hydrops do not have access to MRI with 3D reconstruction of the endolymphatic space. Our main objective was to show that measurements of the saccule on a non-enhanced 3D-T2 MRI could show hydrops and help diagnose Menière disease. We conducted a prospective study from 2015 to 2016 to compare consecutive patients consulting for Menière's disease to a control group (patients with unilateral non-hydrops disorders and contralateral healthy ears). They all received full auditory and vestibular testing...
September 26, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28948643/a-potential-link-between-lateral-semicircular-canal-orientation-head-posture-and-dietary-habits-in-extant-rhinos-perissodactyla-rhinocerotidae
#15
Rico Schellhorn
Extant rhinoceroses share the characteristic nasal horn, although the number and size of horns varies among the five species. Although all species are herbivores, their dietary preferences, occipital shapes, and common head postures vary. Traditionally, to predict the "usual" head posture (the most used head posture of animals during normal unstressed activities, i.e., standing) of rhinos, the occipital shape was used. While a backward inclined occiput implies a downward hanging head (often found in grazers), a forward inclined occiput is related to the horizontal head posture in browsing rhinos...
September 26, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28946730/the-rolling-earlobe-flap-for-dilated-ear-holes-following-ear-gauging-a-novel-approach-to-aesthetically-preserving-earlobe-soft-tissue-volume
#16
Wan-Sze Pek, Lin Hon Terence Goh, Chong Han Pek
Patients are increasingly seeking repair of their earlobes following ear gauging. Research has shown that current repair techniques either excessively reduce the lobular volume or leave an obvious scar along the free edge of the earlobe. In our case series, we describe the use of a novel technique for repairing earlobes following ear gauging using a rolling earlobe flap that preserves the lobular volume and avoids leaving a scar on the free edge of the lobule. The procedure was performed on 3 patients (6 earlobes) who had defects from ear gauging that ranged from 3...
September 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28946717/effects-of-human-adipose-derived-stem-cells-on-the-survival-of-rabbit-ear-composite-grafts
#17
Chae Min Kim, Joo Hyun Oh, Yeo Reum Jeon, Eun Hye Kang, Dae Hyun Lew
BACKGROUND: Composite grafts are frequently used for facial reconstruction. However, the unpredictability of the results and difficulties with large defects are disadvantages. Adipose-derived stem cells (ADSCs) express several cytokines, and increase the survival of random flaps and fat grafts owing to their angiogenic potential. METHODS: This study investigated composite graft survival after ADSC injection. Circular chondrocutaneous composite tissues, 2 cm in diameter, from 15 New Zealand white rabbits were used...
September 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28944619/comparative-study-of-new-autologous-material-bone-cartilage-composite-graft-for-ossiculoplasty-with-polycel-%C3%A2-and-titanium
#18
J S Kong, C Y Jeong, M J Shim, W J Kim, S W Yeo, S N Park
OBJECTIVE: Ossiculoplasty is a surgical procedure that recreates sound transmission of the middle ear in conductive hearing loss. Various materials have been used for ossicular reconstruction, but the most ideal material for ossiculoplasty remains controversial. The purpose of this study was to introduce a novel method of autologous ossiculoplasty, bone-cartilage composite graft (BCCG) and to compare its surgical results with different types of ossiculoplastic prostheses. STUDY DESIGN: A retrospective study was performed in a tertiary referral centre...
September 25, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28940719/effect-of-availability-of-video-laryngoscopy-on-the-use-of-fiberoptic-intubation-in-school-aged-children-with-microtia
#19
Ichiro Kondo, Hidetsugu Kobayashi, Yoshihumi Suga, Akihiro Suzuki, Shuya Kiyama, Shoichi Uezono
BACKGROUND: With the increasing popularity of video laryngoscopy during intubation of pediatric patients with normal or difficult airways, fiberoptic-assisted tracheal intubation, traditionally considered the gold standard for difficult intubation, may become underused. AIM: We aimed to assess the use of airway management techniques before and after introduction of video laryngoscopy in a cohort of school-aged children with microtia, who are at increased risk of difficult intubation...
November 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28938313/a-novel-3-step-method-for-correction-of-type-1-stahl-ear
#20
Mimi R Borrelli, Edward H Davidson, Anand R Kumar
BACKGROUND: Stahl ear, a rare congenital auricular anomaly, occurs when a third crus crosses the scaphoid fossa. Optimal elimination of the third crus and reconstruction the superior crus in type 1 Stahl ear remain undercharacterized. We present a novel 3-step technique to reliably correct a type 1 Stahl ear as a case report. METHODS: A 10-year-old male with bilateral prominent type 1 Stahl ears is presented. An anterior curvilinear helical fold incision and posterior V wedge excision was used for exposure...
September 21, 2017: Journal of Craniofacial Surgery
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