The Effect of the Lateral First Metatarsal Head Shape on Hallux Valgus in Forced Turnout in Pre-Pointe Female Ballet Dancers: A Pilot Study.

IF 0.5 4区 医学 Q4 ORTHOPEDICS
Paul H Doan, David M Handojo, Shivani Parihar, Alison Pitts, Reza Naraghi, Sarah L Carter
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引用次数: 0

Abstract

Background: A rounded lateral first metatarsal head shape is associated with higher rates of hallux abducto valgus recurrence following corrective surgery; however, the effect of the lateral first metatarsal head shape on the hallux abduction angle (HAA) has not yet been explored in a nonpathologic, pre-pointe ballet dancer population. The primary purpose of this study was to investigate the effect of the lateral first metatarsal head shape on the HAA when pre-pointe female dancers force their turnout.

Methods: Seventeen female, pre-pointe ballet students (mean age, 10.8 ± 0.95 years) participated in this study. Fluoroscopic images of each dancer's dominant foot were taken, and the lateral first metatarsal head shape was classified visually. Each dancer performed three consecutive stances of natural double-leg upright posture: both functional and forced turnout. HAAs were obtained by marking medial bony landmarks on paper and were compared to photographic measurements.

Results: No significant difference was found between the round and angular lateral first metatarsal head shape for the change in HAA from natural double-leg upright posture to forced turnout. Hallux abduction angle significantly increased by 4.6° (P < .001) in forced turnout compared to the natural double-leg upright posture for the photographic method, whereas the paper method demonstrated an increase of 2.6° (P = .007). No statistical differences were found between the paper and photographic methods in measuring the HAA for all stances.

Conclusions: Our findings suggest no association between the HAA and lateral first metatarsal head shape; however, HAA does increase when a dancer assumes forced turnout. The paper method demonstrated similar reliability to the photographic method and shows the potential for future use as a clinical tool in assessing hallux abducto valgus.

第一跖骨头外侧形状对点前女性芭蕾舞者在强制翻转时拇指外翻的影响:一项试点研究
背景:外侧第一跖骨头的圆形与矫正手术后较高的拇指外翻复发率有关;然而,外侧第一跖骨头的形状对拇指外展角(HAA)的影响尚未在非病态的点前芭蕾舞者群体中进行过探讨。本研究的主要目的是调查当点前女性舞者用力转体时,外侧第一跖骨头形状对 HAA 的影响:17 名初学芭蕾舞的女学生(平均年龄为 10.8 ± 0.95 岁)参加了这项研究。对每位舞者的优势足进行透视成像,并对外侧第一跖骨头的形状进行目测分类。每位舞者都连续做了三个自然双腿直立姿势:功能性和强迫性转体。通过在纸上标记内侧骨性地标获得 HAA,并与照片测量结果进行比较:结果:从自然双腿直立姿势到强迫翻身,圆形和角形外侧第一跖骨头形状对 HAA 的变化无明显差异。与自然双腿直立姿势相比,摄影法的髋外展角度在强迫翻转时明显增加了 4.6° (P < .001),而纸上测量法增加了 2.6° (P = .007)。在测量所有姿势的 HAA 时,纸质方法和照相方法之间没有统计学差异:我们的研究结果表明,HAA 与外侧第一跖骨头形状之间没有关联;但是,当舞者进行强制转体时,HAA 确实会增加。纸上测量法与摄影测量法具有相似的可靠性,显示了未来作为临床工具用于评估拇指外翻的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.10
自引率
0.00%
发文量
128
审稿时长
6-12 weeks
期刊介绍: The Journal of the American Podiatric Medical Association, the official journal of the Association, is the oldest and most frequently cited peer-reviewed journal in the profession of foot and ankle medicine. Founded in 1907 and appearing 6 times per year, it publishes research studies, case reports, literature reviews, special communications, clinical correspondence, letters to the editor, book reviews, and various other types of submissions. The Journal is included in major indexing and abstracting services for biomedical literature.
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