Objective: To explore the anthropometric changes of the auricle after auricular cartilage unfolding in moderate concha-type microtia patients, so as to provide the basis to help evaluate surgical timing and prognostic.
Methods: A total of 33 children with moderate concha-type microtia, who were treated with auricular cartilage unfolding between October 2016 and September 2018 and met the inclusive criteria, were included in the study. There were 24 boys and 9 girls with an average age of 1.4 years (range, 1-3 years). Sixteen cases were left ears and 17 cases were right ears. The follow-up time was 12-23 months (mean, 17.5 months). The affected auricular detailed structures were observed and quantitatively analyzed before operation and at immediate after operation. The width, length, and perimeter of auricle before operation and at immediate after operation and at last follow-up were noted with three dimensional-scanning technology. The normal auricle was noted as control.
Results: There were (7.5±1.0) and (11.3±0.8) structures of the affected auricle at pre- and post-operation, respectively, showing significant difference between pre- and post-operation ( t=23.279, P=0.000). The length, width, and perimeter of the affected auricle constantly increased after operation, and there were significant differences between pre-operation and immediately after operation and between immediately after operation and last follow-up ( P<0.05). The differences of length, width, and perimeter of the affected auricle between immediately after operation and last follow-up were (3.13±1.44), (2.44±0.92), and (8.50±3.76) mm, respectively. And the differences of length, width, and perimeter of the normal auricle between pre-operation and last follow-up were (3.16±1.54), (2.35±0.86), and (9.79±4.60) mm, respectively. There was no significant difference in the differences of length, width, and perimeter between the affected auricle and the normal auricle ( P>0.05).
Conclusion: The auricular cartilage unfolding in treatment of the moderate concha-type microtia can receive more ear structures and increase auricle sizes, which make it possible for free composite tissue transplantation. In addition, the affected and the contralateral normal auricles have a very similar growth rate and it offers the theoretical foundation for the early treatment for moderate concha-type microtia.
目的: 探讨中度耳甲腔型小耳畸形耳软骨舒展术后耳廓形态学特点，为临床选择适应证、手术时机以及评估预后提供参考。.
方法: 以 2016 年 10 月—2018 年 9 月接受耳软骨舒展术治疗且符合选择标准的 33 例单侧中度耳甲腔型小耳畸形患儿作为研究对象。男 24 例，女 9 例；年龄 1～3 岁，平均 1.4 岁。左耳 16 例，右耳 17 例。随访时间 12～23 个月，平均 17.5 个月。术前、术后即刻拍摄照片观察耳廓细微结构，对结构单元进行量化分析。术前、术后即刻及末次随访时行头面部三维扫描，测量患侧耳长、耳宽及耳廓周长，以健侧耳廓作为对照进行比较。.
结果: 患儿术前患侧耳廓具有（7.5±1.0）个结构单元，术后即刻为（11.3±0.8）个，差异有统计学意义（ t=23.279， P=0.000）。患侧术后即刻耳长、耳宽及耳廓周长均较术前增加，末次随访时较术后即刻进一步增加，差异均有统计学意义（ P<0.05）。患侧术后即刻及末次随访时耳长、耳宽及耳廓周长差值分别为（3.13±1.44）、（2.44±0.92）、（8.50±3.76）mm，健侧术前及末次随访时各差值分别为（3.16±1.54）、（2.35±0.86）、（9.79±4.60）mm，健患侧比较差异均无统计学意义（ P>0.05）。.
结论: 对于中度耳甲腔型小耳畸形，耳软骨舒展术既增加了耳廓结构单元数量、改善耳廓外观，又增大了耳廓，为二期对侧耳廓复合组织移植术创造了条件；同时术后双侧耳廓生长发育速度相似，为选择早期行耳软骨舒展术提供了理论依据。.
Keywords: Concha-type microtia; anthropometric measurements; auricular cartilage unfolding.