*University of New Mexico Health Sciences Center †Presbyterian Ear Institute, Albuquerque, New Mexico.
Otol Neurotol. 2017 Dec;38(10):1470-1475. doi: 10.1097/MAO.0000000000001579.
To compare temporal bone thickness along a three-dimensional arc of potential osseointegrated implant sites for bone-anchored hearing aids in children with and without aural atresia using computed tomographic imaging (CT).
Retrospective case review.
Tertiary children's hospital.
Children with or without aural atresia aged less than 11 years who had a temporal bone CT.
INTERVENTION (S): Calvarial bone volume on CT was rendered in three-dimensional and thickness was reconstructed and measured at up to 12 defined sites along an arc of recommended implant sites.
MAIN OUTCOME MEASURE (S): Determining whether a majority of observed potential implant sites have 2, 3, or 4 mm of bone thickness while controlling for age differences and atresia status.
A total of 40 atretic (from 34 patients) and 34 control (from 34 patients) temporal bones were compared using CT. Likelihood ratio tests indicated that diagnosis did not have a statistically significant effect on whether patients reached thresholds of 2, 3, or 4 mm at most observed sites (p = 0.781, 0.773, and 0.529, respectively) when adjusting for age. For all children measured, 93% had >50% of measured points greater than or equal to 2 mm thick.
Most children had greater than 2 mm of temporal bone thickness at >50% of the sites measured regardless of age or atresia diagnosis. The likelihood of reaching 4 mm of thickness at most sites improves with age. In unilateral patients, there was not a significant difference in thickness between affected and unaffected sides. There was also no significant difference in thickness when comparing patients with atresia to those without.
通过计算机断层扫描成像（CT）比较有无听骨闭锁儿童的骨整合式人工耳蜗植入部位的三维弧形颞骨厚度。
回顾性病例研究。
三级儿童医院。
年龄小于 11 岁的有无听骨闭锁的儿童，且行颞骨 CT。
CT 重建并测量三维颅骨骨量，在推荐的植入部位弧形上多达 12 个定义部位测量骨厚度。
确定在控制年龄差异和闭锁状态的情况下，大多数观察到的潜在植入部位中是否有 2、3 或 4mm 的骨厚度。
共比较了 40 个闭锁（来自 34 例患者）和 34 个对照组（来自 34 例患者）的颞骨 CT。似然比检验表明，在调整年龄后，诊断对大多数观察部位是否达到 2、3 或 4mm 的阈值没有统计学意义（p=0.781、0.773 和 0.529）。对于所有测量的儿童，93%的测量点中有>50%大于或等于 2mm 厚。
无论年龄或闭锁诊断如何，大多数儿童在>50%的测量部位有>2mm 的颞骨厚度。大多数部位达到 4mm 厚度的可能性随着年龄的增长而增加。在单侧患者中，受累侧与非受累侧之间的厚度无显著差异。与无闭锁的患者相比，厚度也无显著差异。
