A Simple Therapeutic Approach to Pincer Nail Deformity Using a Memory Alloy: Measurement of Response

Authors

  • Jonathan Te-Peng Tseng MD,

    1. Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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  • Wen-Tsao Ho MD,

    1. Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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  • Chun-Hung Hsu MD,

    1. Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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  • Ming-Hsiu Lin MD,

    1. Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
    2. Department of Dermatology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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  • Chien-Nien Li MD,

    1. Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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  • Woan-Ruoh Lee MD, PhD

    Corresponding author
    1. Department of Dermatology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
    2. Graduate Institute of Medical Sciences, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
    • Department of Dermatology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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  • The authors have indicated no significant interest with commercial supporters.

Address correspondence and reprint requests to: Woan-Ruoh Lee, MD, PhD, 291 Jhongjheng Rd., Jhonghe District, New Taipei City, 23561, Taiwan (R.O.C.), or e-mail: wrlee@tmu.edu.tw

Abstract

Background

Pincer nail deformity (PND) is a dystrophy characterized by transverse overcurvature of the nail plate that may cause intractable pain and decrease the quality of life of patients.

Objectives

To evaluated the efficacy of a superelastic nickel–titanium (SE NiTi) wire for the treatment of PND using transverse curvature improvement and subjective assessment of pain relief during and after the treatment.

Methods

SE NiTi wire was implanted over the distal tip of the nail for the treatment of PND in 43 patients (28 female, 15 male), with a total of 73 digits receiving treatment. Evaluations of improvement included measuring changes in transverse curvature of the nail and subjective assessment of pain relief throughout the follow-up period.

Results

In all patients, treatment of the pincer nail with implantation of SE NiTi wire achieved satisfactory results. Significant improvement (p < .05) of the transverse overcurvature of the nail was seen in all patients at 2 months, and relief of pain was determined in 100% of cases throughout our follow-up period.

Conclusion

This simple SE NiTi wire insertion method is noninvasive and inexpensive, leaves no cosmetic disfigurement, and leads to excellent therapeutic results. Patients achieved great satisfaction. Thus, this technique should be considered the first line of treatment in the correction of mild to moderate PND.

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