Seattle Ear Clinic, Seattle, Washington 98122-4328, U.S.A.
Otol Neurotol. 2010 Sep;31(7):1022-6. doi: 10.1097/MAO.0b013e3181e9bee4.
To determine if nitinol-Teflon shape-memory stapes prostheses offer a hearing result advantage compared with platinum-Teflon pistons that must be manually crimped.
Retrospective chart review.
One hundred eighty-eight consecutive ears with either a platinum or a nitinol piston and primary stapes surgery between 1998 and 2009.
Subspecialty private practice.
One hundred forty-four ears received a platinum 0.6-mm-diameter piston, and 44 ears received a nitinol 0.6-mm-diameter piston.
American Academy of Otolaryngology-Head and Neck Surgery guidelines, including 4-frequency pure-tone average air-bone (AB) gap, and success (gap <or= 10 dB) rate.
Success at closing the AB gap was comparable for both groups (platinum, 96%; nitinol, 92%; p = not significant). The nitinol group had significantly smaller mean AB gaps in the lower frequencies (at 250 Hz, 9.3 versus 15.4 dB and at 500 Hz, 1.9 versus 5.0 dB; p's < 0.01), but not at 1, 2 or 4 kHz. The highly malleable platinum loop was adaptable to various incus diameters and was easy to crimp. The 360-degree circumferential version of the nitinol prosthesis may adapt to various incus diameters better than the original version (minimum heat-crimped diameter, 0.70 versus 0.76 mm). In some cases, both nitinol versions were difficult to crimp using only a laser, and a manual crimp was also required.
The nitinol stapes prostheses failed to live up to claims of consistent ease of crimping; however, the significantly better low-frequency hearing results justify an effort to make the devices more user friendly.
确定与必须手动卷曲的铂-聚四氟乙烯活塞相比，镍钛诺-聚四氟乙烯形状记忆镫骨假体是否具有听力优势。
回顾性图表回顾。
1998 年至 2009 年间，连续 188 只耳朵接受了铂或镍钛诺活塞的一级镫骨手术。
专科私人诊所。
144 只耳朵接受了 0.6 毫米直径的铂活塞，44 只耳朵接受了 0.6 毫米直径的镍钛诺活塞。
美国耳鼻喉科学-头颈外科学会指南，包括 4 个频率纯音平均气骨（AB）间隙和成功率（间隙≤10 dB）。
两组闭合 AB 间隙的成功率相当（铂，96%；镍钛诺，92%；p 无统计学意义）。镍钛诺组在低频时的平均 AB 间隙明显较小（在 250 Hz 时，9.3 与 15.4 dB，在 500 Hz 时，1.9 与 5.0 dB；p's < 0.01），但在 1、2 或 4 kHz 时则不然。高度可延展的铂环可以适应各种砧骨直径，易于卷曲。镍钛诺假体的 360 度圆周版本可能比原始版本更能适应各种砧骨直径（最小热卷曲直径，0.70 与 0.76 毫米）。在某些情况下，仅使用激光很难卷曲两种镍钛诺版本，因此还需要手动卷曲。
镍钛诺镫骨假体未能满足易于卷曲的一致性要求；然而，显著改善的低频听力结果证明值得努力使这些设备更便于使用。
