Eby T L, Nadol J B
Ann Otol Rhinol Laryngol. 1986 Jul-Aug;95(4 Pt 1):356-64. doi: 10.1177/000348948609500407.
Recent interest in cochlear implantation for children has made it important to understand how postnatal growth of the ear will affect such devices. In this study, the postnatal growth of the labyrinth, middle ear, and mastoid was measured in three dimensions using radiographic and temporal bone data. Measurements were made from histologic sections of 48 temporal bones from children and compared to adult temporal bones. Radiographic measurements were made from 253 sets of skull radiographs of children and compared to adult skull series. In the three dimensions measured, there was no postnatal growth of the labyrinth and little variation in size between individuals. Measurements of the middle ear showed greater variation between individuals than measurements of the inner ear, but growth only in the distance from stapes footplate to the tympanic membrane. The mastoid showed growth in all three dimensions: length, width, and depth. The pattern of growth for mastoid length and width appears to follow a double logistic model, with differences between males and females. The growth in mastoid depth is smaller and appears to follow a single exponential curve. The implications for cochlear implantation in children are discussed.
近期对儿童人工耳蜗植入的关注使得了解耳部出生后的生长如何影响此类设备变得很重要。在本研究中，利用放射影像学和颞骨数据对迷路、中耳和乳突的出生后生长进行了三维测量。测量取自48例儿童颞骨的组织学切片，并与成人颞骨进行比较。放射影像学测量取自253组儿童颅骨X线片，并与成人颅骨系列进行比较。在所测量的三个维度中，迷路没有出生后生长，个体之间大小差异很小。中耳测量显示个体间差异比内耳测量更大，但仅在镫骨足板到鼓膜的距离上有生长。乳突在所有三个维度上均有生长：长度、宽度和深度。乳突长度和宽度的生长模式似乎遵循双逻辑模型，且男性和女性之间存在差异。乳突深度的生长较小，似乎遵循单指数曲线。文中讨论了对儿童人工耳蜗植入的影响。
