Innovative technique for correction of the congenital lop ear

Ho, Kevin; Boorer, Catherine; Khan, Umraz; Deva, Anand K.; Chang, Lou-Ren

doi:10.1016/j.bjps.2005.09.029

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…The incidence of lop ear is estimated to be 2–5% in the Caucasian population and 10–15% in those of African descent [Cosman, 1978; Horlock et al, 1998; Ho et al, 2006]. In the Japanese population, the incidence is reported to be 38% at birth and 6% at 1 year of age [Matsuo et al, 1990].…”

Section: Discussionmentioning

confidence: 99%

Nonisothermal crystallization kinetics of polytetrafluoroethylene/solid glass microsphere composites

Wang¹,

Kou²,

Chen³

et al. 2010

J of Applied Polymer Sci

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The nonisothermal crystallization behavior and kinetics of polytetrafluoroethylene (PTFE) and PTFE/ solid glass microsphere (SGM) composites were investigated with differential scanning calorimetry at various cooling rates (U's). Three methods, namely, the Jeziorny, Ozawa and Mo methods, were used to describe the nonisothermal crystallization process. The results show that the peak temperature, crystallinity (X c ), and crystallization half-time were strongly dependent on the content of SGMs and U. The SGMs in the PTFE/SGM composites exhibited a higher nucleation activity. The nonisothermal crystallization kinetics of PTFE and the PTFE/SGM composites was analyzed successfully with the Jeziorny and Mo methods; however, the Ozawa equation was invalid for the nonisothermal crystallization process. The crystallization activation energy determined with the Kissinger equation was remarkably lower when a small amount of SGMs (5%) was added and then gradually increased and finally became slightly lower than that of pure PTFE as the content of SGMs increased up

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Section: Discussionmentioning

confidence: 99%

Nonisothermal crystallization kinetics of polytetrafluoroethylene/solid glass microsphere composites

Wang¹,

Kou²,

Chen³

et al. 2010

J of Applied Polymer Sci

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“…Hillock (tubercle) 3 of the first branchial arch accounts for the upper third of the auricle [Davis, 1987; Karmody and Annino, 1995; Lacombe, 1997; Hunter and Yotsuyanagi, 2005]. A lop ear might result if the helix fails to unfold between the 12th and 16th week of gestational age [Maniglia and Maniglia, 1981; Ho et al, 2006]. The underlying cause might be both an intrinsic and an extrinsic problem with the musculature of the auricle, which results in alterations of plical folding of the cartilaginous ear plate [Hunter and Yotsuyanagi, 2005].…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Lop ear is a congenital anomaly of the superior one‐third of the auricle and is characterized by a varying degree of overfolding of the auricle, reduction or absence of the superior crus of the antihelix, reduction of the scapha, and reduction in the vertical height of the auricle [Park, 2000; Ho et al, 2006]. Lop ear can be an isolated malformation or a component manifestation of a variety of syndromes such as s calp‐ e ar‐ n ipple (SEN), and Townes‐Brocks [Edwards et al, 1994; Rossmiller and Pasic, 1994; Carey et al, 2006].…”

Section: Introductionmentioning

confidence: 99%

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Dominantly‐inherited lop ears

Leung

Kong

Robson

et al. 2007

American J of Med Genetics Pt A

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We describe a four-generation Chinese family that included five members who had an isolated bilateral lop ear anomaly. The presentation suggested a dominant mode of inheritance. The absence of male-to-male transmission does not exclude an X-linked dominant mode of inheritance. Since the phenotypic anomaly of the male proband was no more severe than the affected female members, an autosomal dominant mode of inheritance is most likely.

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“…Moreover, he also used a technique involving anterior scars. Further techniques used to improve the height was the addition of cartilage-based flaps, such as the one described by Davis, 17 the chondrocutaneous postauricular flap, 18 the rearrangement of the lidded helix as single or double pedicled banner flaps, 6,19 or even free helical, 6 conchal, 8,20,21 and costal grafts. 8,22,23 Park 24 also described a tumbling concha-cartilage flap to correct the position of minor lop ear.…”

Section: Cartilage Reconstructionmentioning

confidence: 99%

Lop Ear to Conchal Microtia

et al. 2022

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Background: The lop ear deformity is defined by a deficient helix and scapha, underdeveloped anthelix, and downfolding of the helix. The terminology used is still confusing, and the treatment is not entirely structured. The aim of this study was to provide a new systematic surgical approach of this deformity based on our center's experience. Materials and Methods: All patients undergoing surgical correction of lop ears between 2007 and 2019 at Great Ormond Street Hospital were included. Patients' data, surgical techniques, and postoperative complications were recorded. Results: Based on our records, we identified 3 surgical techniques for the correction of lop ears, based on the degree of deformity encountered. In a mild lop ear, correction was achieved with a modified otoplasty technique by improving the definition of the antihelix and superior crus. In a moderate deformity, additional remodeling of the lidded helix was performed (extended otoplasty), whereas for the severe lop ear, the amount of cupping and the deficient cartilage required formal reconstruction using a carved rib cartilage framework. There were a total of 109 patients and 146 lop ears: 58 mild, 27 moderate, and 61 severe lop ears. Conclusion:We feel that there is a point in the spectrum of congenital ear deformity when a severe lop ear becomes a conchal microtia and recommend this approach to simplify the management of these cases. This is intended to bring greater clarity to how to deal with lop ears, based on the severity of the deformity and the surgical techniques used.

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Innovative technique for correction of the congenital lop ear

Cited by 7 publications

References 8 publications

Nonisothermal crystallization kinetics of polytetrafluoroethylene/solid glass microsphere composites

Nonisothermal crystallization kinetics of polytetrafluoroethylene/solid glass microsphere composites

Dominantly‐inherited lop ears

Lop Ear to Conchal Microtia

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