Service d'ORL, Institut Arthur Vernes, 36, Rue d'Assas, 75006 Paris, France.
Service de Radiologie, Institut Arthur Vernes, 36, Rue d'Assas, 75006 Paris, France.
Eur Ann Otorhinolaryngol Head Neck Dis. 2020 Nov;137(5):387-391. doi: 10.1016/j.anorl.2020.01.013. Epub 2020 Feb 10.
To assess the CT scan aspect of cement bridges used to repair incudostapedial joint discontinuity (ISD) and correlate these observations to audiometric data over time.
A retrospective study in 12 patients with cement rebridging for ISD compared pre- and post-operative pure-tone average thresholds, Hounsfield units (HU), and bridge size and position on postoperative CT scans.
Mean pre- and post-operative air-bone gap (ABG) was 24.5 and 16dB, respectively. HU did not vary over time post-surgery, with no significant correlation between HU and time to postoperative CTnscan up to 24months (p=0.219). However, a "suggestive" correlation was found between postoperative ABG and HU (p=0.004, r=-0.7). High cement density correlated with good functional outcome: HU <500 indicating functional failure and >1000 indicating ABG closure.
Immediate cement polymerization quality (high HU) was stable over time and a marker of ossiculoplasty success, correlating with good functional outcome. Particular care should be taken in preparing the cement, and solidification needs to be on dry mucosa-free ossicles.
评估用于修复镫骨-砧骨关节不连续性（ISD）的水泥桥的 CT 扫描表现，并将这些观察结果与随时间推移的听力数据相关联。
对 12 例因 ISD 行水泥再桥接的患者进行回顾性研究，比较术前和术后纯音平均听阈、Hounsfield 单位（HU）以及术后 CT 扫描上的桥大小和位置。
平均术前和术后气骨间隙（ABG）分别为 24.5dB 和 16dB。术后 HU 无随时间变化，HU 与术后 CTn 扫描至 24 个月的时间之间无显著相关性（p=0.219）。然而，术后 ABG 和 HU 之间存在“提示性”相关性（p=0.004，r=-0.7）。高水泥密度与良好的功能结果相关：HU<500 表示功能失败，HU>1000 表示 ABG 闭合。
即刻水泥聚合质量（高 HU）随时间稳定，是听骨成形术成功的标志，与良好的功能结果相关。在准备水泥时应特别小心，凝固需要在干燥无黏膜的听小骨上进行。
