Department of Dermatology, Seoul National University Boramae Hospital, Seoul, Korea.
Dermatol Surg. 2013 Oct;39(10):1520-6. doi: 10.1111/dsu.12312.
Pincer nails are characterized by the transverse curvature increasing from the proximal to the distal aspect along the longitudinal axis. A novel treatment technique using a shape memory alloy device was recently introduced.
To determine the treatment outcomes and safety of a shape memory alloy device.
This was a retrospective analysis of 21 cases of pincer nail of the great toe in 14 patients. Subjective indices (pain, inconvenience, global assessment scores) and objective parameters (transverse angle, width index) on days 0 (D0) and 1 (D1) and weeks 2 (W2) and 12 (W12) were investigated.
All parameters started to show significant improvement on D1. From D0 to D1, pain score fell from 3.6 ± 1.0 to 1.5 ± 0.7, inconvenience score fell from 3.3 ± 1.0 to 1.5 ± 0.7, global assessment score increased from 1.5 ± 0.7 to 2.5 ± 0.7, transverse angle improved from 86.4 ± 27.7° to 114.7 ± 21.6°, and width index improved from 67.6 ± 13.1% to 89.0 ± 9.7%. These effects were consistent during 12 weeks of follow-up. Two cases (9.5%) recurred, but symptoms were less severe than before. No complication was identified.
A shape memory alloy device was an effective and safe way to rapidly correct symptomatic pincer nail deformity.
钳状甲的特征是沿纵轴从近端到远端横向曲率逐渐增加。最近引入了一种使用形状记忆合金装置的新型治疗技术。
确定形状记忆合金装置的治疗效果和安全性。
这是对 14 名患者的 21 例大脚趾钳状甲的回顾性分析。在第 0 天（D0）和第 1 天（D1）以及第 2 周（W2）和第 12 周（W12）测量主观指标（疼痛、不便、整体评估评分）和客观参数（横角、宽度指数）。
所有参数在 D1 时开始显示出明显改善。从 D0 到 D1，疼痛评分从 3.6±1.0 降至 1.5±0.7，不便评分从 3.3±1.0 降至 1.5±0.7，整体评估评分从 1.5±0.7 增至 2.5±0.7，横角从 86.4±27.7°改善至 114.7±21.6°，宽度指数从 67.6±13.1%增至 89.0±9.7%。这些效果在 12 周的随访期间保持一致。有 2 例（9.5%）复发，但症状比以前轻。未发现并发症。
形状记忆合金装置是一种快速矫正症状性钳状甲畸形的有效且安全的方法。
