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Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires
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A foot structure study of new arch flexibility grading system based on three-dimensional arch volume
Jun Liu1, Miao Deng2, Wei Wang2
1Department of Orthopedics, Daping Hospital, Army Medical University, Chongqing, 400042, China; The 5th Outpatient Clinic, Western Theater General Hospital, Chengdu, 610000, China.
Chinese Journal of Traumatology = Zhonghua Chuang Shang Za Zhi
|September 16, 2023
Summary
A new 3D classification system for arch volume flexibility (AVF) was developed. This system, along with arch height flexibility (AHF), was analyzed in relation to foot arch types, revealing no significant correlation between AVF and AHF.
Area of Science:
- Biomechanics
- Orthopedics
- Podiatry
Background:
- Foot arch structure and flexibility are crucial for foot function and injury prevention.
- Traditional methods often rely on arch height, lacking a comprehensive 3D understanding.
- A novel classification system is needed to better characterize foot arch properties.
Purpose of the Study:
- To introduce a new three-dimensional (3D) classification system for arch volume flexibility (AVF).
- To investigate the relationship between AVF and arch index (AI).
- To examine the correlation between arch height flexibility (AHF) and AI.
Main Methods:
- Recruited 180 young male adults for 3D foot scanning and navicular height measurement.
- Calculated AVF and AHF, classifying arches into five flexibility levels (very stiff to very flexible) and three types (cavus, rectus, planus).
- Employed chi-squared and Spearman correlation tests to analyze data, with statistical significance set at p < 0.05.
Main Results:
- Valid data from 318 feet were analyzed; no significant difference in AVF was found between left and right feet.
- AVF distribution varied across cavus, rectus, and planus foot types, but these differences were not statistically significant.
- No significant correlation was found between arch height flexibility (AHF) and arch volume flexibility (AVF) (p=0.060).
Conclusions:
- Arch volume flexibility (AVF) is evenly distributed across different foot arch types (cavus, rectus, planus).
- The study found no statistically significant relationship between AVF and arch height flexibility (AHF).
- AVF offers a potentially more comprehensive 3D measure of arch flexibility compared to AHF.
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