Hallux interphalangeal angle and risk of ingrown hallux nail

NewsBot · Oct 21, 2015

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Relationship between the presence of abnormal hallux interphalangeal angle and risk of ingrown hallux nail: a case control study
Antonio C?rdoba-Fern?ndez, Pedro Monta?o-Jim?nez, Manuel Cohe?a-Jim?nez
BMC Musculoskeletal Disorders; October 2015, 16:301,

Background
Many risk factors have been identified to be associated with ingrown toenail. Internal pressure by the distal phalanx of the hallux and the second toe and external compression from the shoes has been proposed as a reason for the pathology. The main objective of the study was to analyze the existence of a correlation between the presence of pathological hallux interphalangeal angle (HIA) and risk of ingrown hallux nail.
Methods
One hundred and sixty-five subjects (312 ft) were enrolled in a cross-sectional, analytical and observational case?control study. A radiographic computerized system was used to measure HIA in both groups. The angle was considered as the sum of three angles, obliquity, asymmetry and joint deviation.
Results
The mean HIA in case group subjects (patients with hallux ingrown nail) was significantly higher than that obtained in control group subjects (17.39 ? 6.0? versus 13.47 ? 4.6?, p = .036). A total of 73.71 and 46.79 % of feet presented an angle equal or greater than 13.47? in the onychocryptosis and control group, respectively.
Conclusions
The results show a correlation between the variables analysed. The presence of an HIA greater or equal than 14.5? may be a predisposing factor for developing onychocryptosis of the hallux. Clinicians treating individuals with pathology in hallux might use a baseline cutoff of HIA equal than 13.5?.
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NewsBot · Sep 30, 2018

Epidemiology and bone-related comorbidities of ingrown nail: A nationwide population-based study.
Cho SY et al
J Dermatol. 2018 Sep 28. doi: 10.1111/1346-8138.14659

Although ingrown nail (IN) is common, there is no large-scale study regarding its epidemiology and risk factors, such as foot deformity. The purpose of this study is to determine the demographics of IN and clarify its association with bone-related comorbidities of the ankle, foot and toe. Patients in a representative sample cohort of the National Health Information Database of South Korea from 2004 to 2013 who had IN were compared with a control group without IN. Ten-year overall incidence was 307.5/100 000 person-years (95% confidence interval, 304.1-310.9). IN incidence and prevalence showed an increasing trend, and IN was more common in women than in men. Incidence showed bimodal peaks, among teenagers and among participants in their 50s. The IN group showed more common valgus deformity (64.3%) than did the control group (61.6%), and flat foot was also a significant risk factor of IN. There were increasing tendencies of IN incidence and prevalence among females. Confirmed bone deformity, especially acquired valgus or varus deformity, and flat foot were associated with IN.
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