Foot loading is different in people with and without pincer nails: a case control study
Abstract Background Recent studies suggest that pincer nails are caused by lack of upward mechanical forces on the toe pad. However, clinically significant pincer nails are also often observed among healthy walkers. It was hypothesized that in these cases, the affected toes do not receive adequate p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Foot and Ankle Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13047-015-0100-y |
| _version_ | 1797321438484496384 |
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| author | Hitomi Sano Kaori Shionoya Rei Ogawa |
| author_facet | Hitomi Sano Kaori Shionoya Rei Ogawa |
| author_sort | Hitomi Sano |
| collection | DOAJ |
| description | Abstract Background Recent studies suggest that pincer nails are caused by lack of upward mechanical forces on the toe pad. However, clinically significant pincer nails are also often observed among healthy walkers. It was hypothesized that in these cases, the affected toes do not receive adequate physical stimulation from walking and loading. To test this, the gait characteristics of pincer nail cases were assessed by measuring plantar pressure during walking. Methods In total, 12 bilateral pincer nail cases (24 affected feet) and 12 age‐ and sex‐controlled healthy control subjects (24 ft) were enrolled in this prospective case–control study. Plantar pressure during free ambulation in both the barefoot and shod state was assessed using a digital pressure‐plate system named S‐Plate platform (Medicapteurs Co. France). First toe pressure and the frequencies of peak pressure in the first toe, metatarsal head, or other foot areas were calculated. Results In both the barefoot and shod state, the pincer nail group had significantly lower pressure on the first toe than the control group. In both the barefoot and shod state, the peak pressure area was mostly the metatarsal head area in the pincer nail group, whereas it was mostly the first toe area in the control group. Binomial logistic regression analysis revealed that peak pressure area was a significant risk factor for pincer nail development. Conclusion Walking behavior appears to contribute to pincer nail development. Pincer nails of walkers could be treated by correcting the walking behaviour so that more pressure is placed on the toe pad. |
| first_indexed | 2024-03-08T04:57:35Z |
| format | Article |
| id | doaj.art-8eb27233f41243f58d12964486e562f7 |
| institution | Directory Open Access Journal |
| issn | 1757-1146 |
| language | English |
| last_indexed | 2024-03-08T04:57:35Z |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Foot and Ankle Research |
| spelling | doaj.art-8eb27233f41243f58d12964486e562f72024-02-07T14:57:49ZengWileyJournal of Foot and Ankle Research1757-11462015-01-0181n/an/a10.1186/s13047-015-0100-yFoot loading is different in people with and without pincer nails: a case control studyHitomi Sano0Kaori Shionoya1Rei Ogawa2Department of PlasticReconstructive and Aesthetic SurgeryNippon Medical School1‐1‐5 Sendagi, Bunkyo‐ku113‐8603TokyoJapanShionoya Orthopedic ClinicAzasekitori 5, Ueta‐chouToyohashi‐cityAichi‐PrefectureJapanDepartment of PlasticReconstructive and Aesthetic SurgeryNippon Medical School1‐1‐5 Sendagi, Bunkyo‐ku113‐8603TokyoJapanAbstract Background Recent studies suggest that pincer nails are caused by lack of upward mechanical forces on the toe pad. However, clinically significant pincer nails are also often observed among healthy walkers. It was hypothesized that in these cases, the affected toes do not receive adequate physical stimulation from walking and loading. To test this, the gait characteristics of pincer nail cases were assessed by measuring plantar pressure during walking. Methods In total, 12 bilateral pincer nail cases (24 affected feet) and 12 age‐ and sex‐controlled healthy control subjects (24 ft) were enrolled in this prospective case–control study. Plantar pressure during free ambulation in both the barefoot and shod state was assessed using a digital pressure‐plate system named S‐Plate platform (Medicapteurs Co. France). First toe pressure and the frequencies of peak pressure in the first toe, metatarsal head, or other foot areas were calculated. Results In both the barefoot and shod state, the pincer nail group had significantly lower pressure on the first toe than the control group. In both the barefoot and shod state, the peak pressure area was mostly the metatarsal head area in the pincer nail group, whereas it was mostly the first toe area in the control group. Binomial logistic regression analysis revealed that peak pressure area was a significant risk factor for pincer nail development. Conclusion Walking behavior appears to contribute to pincer nail development. Pincer nails of walkers could be treated by correcting the walking behaviour so that more pressure is placed on the toe pad.https://doi.org/10.1186/s13047-015-0100-yPincer nailMechanical forceIngrown nailNail deformity |
| spellingShingle | Hitomi Sano Kaori Shionoya Rei Ogawa Foot loading is different in people with and without pincer nails: a case control study Journal of Foot and Ankle Research Pincer nail Mechanical force Ingrown nail Nail deformity |
| title | Foot loading is different in people with and without pincer nails: a case control study |
| title_full | Foot loading is different in people with and without pincer nails: a case control study |
| title_fullStr | Foot loading is different in people with and without pincer nails: a case control study |
| title_full_unstemmed | Foot loading is different in people with and without pincer nails: a case control study |
| title_short | Foot loading is different in people with and without pincer nails: a case control study |
| title_sort | foot loading is different in people with and without pincer nails a case control study |
| topic | Pincer nail Mechanical force Ingrown nail Nail deformity |
| url | https://doi.org/10.1186/s13047-015-0100-y |
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