Morphologic Study of Normal, Ingrown, and Pincer Nails

Kosaka, Masaaki; Kusuhara, Hirohisa; Mochizuki, Yoshinari; Mori, Hiromasa; Isogai, Noritaka

doi:10.1111/j.1524-4725.2009.01361.x

Cited by 29 publications

(55 citation statements)

References 16 publications

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“…It is reported that the pincer nails tend to show a greater inward curvature on the distal side [18]. The same portions of the nail are converted in koilonychia [16].…”

Section: Discussionmentioning

confidence: 99%

Influence of Mechanical Forces as a Part of Nail Configuration

Sano

Ichioka

2012

Dermatology

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Background: Clinicians encounter pincer nails at a high incidence among bedridden cases who are free from weight bearing. The mechanical force transmitted by walking and loading may affect the nail configuration. This study was aimed at evaluating the influence of mechanical forces on the nail configuration. Methods: Study 1 was conducted on a sample size of 318 great toenails, with the subjects classified into the following 3 groups: healthy volunteers, participants who were bedridden for less than 3 months, and participants who were bedridden for more than 3 months. Study 2 was conducted in 12 subjects with unilateral loading. Assessments: The configuration of the great toenails, in terms of the curve index (defined as the nail height/nail width), was compared. Results: In study 1, the curve index increased significantly as the duration of the bedridden state became longer (17.5 ± 4.75, 28.9 ± 11.0, 36.4 ± 9.58, respectively). In study 2, the curve index on the nonloaded side was significantly higher than that on the loaded side (40.0 ± 8.63 vs. 27.0 ± 8.39). Conclusion: Our results suggest that mechanical forces may affect the nail configuration and be involved in the pathophysiology of nail deformities.

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“…It is reported that the pincer nails tend to show a greater inward curvature on the distal side [18]. The same portions of the nail are converted in koilonychia [16].…”

Section: Discussionmentioning

confidence: 99%

Influence of Mechanical Forces as a Part of Nail Configuration

Sano

Ichioka

2012

Dermatology

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“…Recent studies, however, suggest that an osteophyte of the distal phalanx is not a cause of but rather a result of a nail overcurvature. 2,12 They hypothesize that the physical difference between the ventral and dorsal sides of the nail plate is the cause of a pincer nail, and the harder dorsal nail plate causes the plastic ventral nail plate to be contracted, resulting in nail bed shrinkage or constriction. 9 Although several conservative and surgical treatment options have been introduced to correct pincer nails, there is no standardized method for achieving rapid improvement, low recurrence, and cosmetically appealing results.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5] To correct pincer nail deformities, several conservative and surgical treatment methods have been suggested, with limited success. As of yet, there is no established standard method for treating pincer nail deformity.…”

mentioning

confidence: 99%

Correction of Pincer Nail Deformities Using a Modified Double Z-Plasty

Cho

Lee²,

Shin³

et al. 2015

Dermatologic Surgery

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“…As in a number of other studies, 5 the authors mention the secondary traction osteophytes but fail to report the widening of the base of the distal phalanx. This is often seen as hook-like osteophytes, which are much more pronounced medially than laterally and are probably the reason for the pronounced lateral deviation of the overcurved big toenail.…”

mentioning

confidence: 82%