eMedicine Specialties > Otolaryngology and Facial Plastic Surgery > External Ear Diseases
External Ear, Aural Atresia: Follow-up
Updated: Nov 25, 2008
Outcome and Prognosis
The outcomes of microtia repair are reflected in the psychological benefit and satisfaction of the patient and/or parent. Brent surveyed his patients in 1992 and noted that those grading themselves as severely affected prior to surgery were 100% pleased with the result.11 Among patients who considered themselves moderately disturbed by microtia and underwent the procedure when younger than 14 years, 95.5% were satisfied with the decision to pursue surgery. In regards to the chest donor site, 62% of all people surveyed reported no concern, and 35% noted the scar as a concern but thought the operation to be worthwhile. Few patients (3%) expressed concern about the appearance of the chest scar.
Future and Controversies
The future of microtia repair includes the development of tissue engineering. Restrictions of present techniques include the limited availability of cartilage to repair the defect and the surgical morbidity of autogenous costal cartilage. Investigations have begun in which a small amount of cartilage may be harvested and expanded in vitro and in vivo. The initial procedure, which was proposed by Peer, used diced autogenous cartilage and placed it in a Vitallium ear mold.12 The mold was subsequently banked and harvested, but the results were not consistent.
More recently, investigations have demonstrated the ability to seed bovine chondrocytes on a biodegradable template and implant these molds into an athymic mouse; this process resulted in an auricle-shaped cartilage. Other studies have shown that autogenous transfer of tissue-engineered cartilage is possible in a rabbit model. The cells are placed on a biodegradable template that engineers 3-dimensional morphology and guides the growth of the new cartilage into an anatomic graft (see Image 15). Tissue-engineered cartilage may represent the implant of the future because of its ability to encompass the advantages of alloplastic and autogenous grafts.
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References
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Further Reading
Keywords
aural atresia, auricular atresia, congenital auricular deformity, small auricle, microtia, anotia, lop ear, cup ear, Stahl ear, peanut ear, anotic ear, peanut deformity, hypoplasia, hypoplastic ear, prominent ear, hemifacial microsomia, Goldenhar syndrome, Treacher Collins syndrome, Franceschetti syndrome, oculoauricular vertebral dysplasia, ear deformity, aural atresia, ear reconstruction
Follow-up: External Ear, Aural Atresia