Correction of Lobule-Type Microtia: I. The First Stage of Costal Cartilage Grafting
Recently, auriculoplasty with costal cartilage grafting has been successfully used for correcting microtia and creating a clearly refined contour and a natural appearance of the ear. However, several important problems remain unsolved in these techniques. The authors describe an improved technique for harvesting costal cartilage with minimal morbidity and a new procedure for fabricating a cartilage frame that ensures a refined shape and rigid structure of the constructed ear.
Costal cartilage is harvested directly with a chisel. This technique enables some of the cartilage at the chest wall to remain intact. The base frame is fabricated by two cartilage blocks partly overlapped on the area of the antihelix. The thickness in the overlapping area emphasizes the contour between the antihelix and the helical crus. To prevent absorption of the cartilage, helical and antihelical parts are created using the outer rigid layer of the harvested cartilage and are covered as much as possible by perichondrium.
A total of 137 ears in 121 patients were corrected with the authors' technique and followed up for at least 3 years. Almost all of the patients could walk within 2 days after the operation. The structure and contour of the constructed ear were well maintained.
Attention should be given not only to successful outcomes of construction of the ear but also to minimal morbidity for the patients. Our technique made it possible to construct a cosmetically refined ear that could be maintained for a long period and minimize the pain and deformity of the donor's chest.
Available from: Ken Yamashita
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ABSTRACT: Here, we introduce our recent operative technique for ear elevation that results in (1) minimal morbidity for patients, (2) symmetric appearance, (3) clearer 3-dimensional structure with a deep concha, (4) good aesthetic appearance by hiding the grafted area behind the ear, and (5) maintenance of deep temporoauricular sulcus and angle.
After a skin incision, the ear is elevated with temporoparietal fascia underlying the cartilage. On the conchal area, undermining is performed just below the skin so that the deep concavity can be maintained. Scalp and neck skin behind the ear is undermined subcutaneously and lifted up cranially to hide the entire area of grafted skin behind the ear. The postauricular surface is covered by full-thickness skin from the lower abdomen. A protective splint is applied for 3 months while sleeping.
A total of 137 ears in 121 patients were corrected with our technique and followed up for at least 3 years. All of the scar tissue could be hidden behind the ear, an aesthetically excellent result.
Our technique made it possible to acquire an excellent and symmetrical shape of the ear. The important points in our procedure are as follows: (1) subcutaneous posterior undermining to enlarge the conchal cavity, (2) careful arrangement of the temporoauricular angle and auriculo-earlobe angle, (3) reduction in the area of temporally grafted skin to hide all scars behind the ear, and (4) protection of the ear to maintain the shape using a postoperative splint.
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ABSTRACT: It is helpful to use 3D models for planning and reference in operation. In most cases, data are given to 3D model makers, who then build the appropriate models. This is expensive and cumbersome. Nowadays, affordable personal 3D printers are available. We purchased one and developed 3D models for clinical use. The clinical 3D data were processed with free software to obtain printable data. The models were printed with acrylonitrile butadiene styrene resin, which could be sterilized and brought into the operative field. The operating cost of the printer was very low. These 3D printers are expected to be widely used in the near future, and it is very possible that such usage of 3D printers will become popular.
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