Is it still current to talk about first ray hypermobility?

Area of Science:

• Biomechanics
• Podiatry
• Orthopedics

Background:

• The concept of hypermobility has been historically linked to foot deformities such as hallux valgus.
• Previous understanding lacked precise pathological mechanisms for these deformities.
• Clinical evaluation has long considered hypermobility a contributing factor.

Purpose of the Study:

• To re-evaluate the terminology used in foot biomechanics, specifically addressing the term "hypermobility."
• To integrate the physics concept of stiffness into the understanding of podalic structures.
• To improve the identification of pathological mechanisms and guide therapeutic interventions for foot deformities.

Main Methods:

• Review of biomechanical principles and their application to foot structures.
• Analysis of the physical properties of the foot, including stiffness and compliance.
• Comparison of the term "hypermobility" with established physics concepts.

Main Results:

• The term "hypermobility" is inconsistent with the physics applied to the foot.
• The concepts of stiffness and compliance offer a more accurate description of podalic structures.
• Revised terminology facilitates a deeper understanding of deformity development.

Conclusions:

• Eliminating the term "hypermobility" in favor of "stiffness" and "compliance" is crucial for advancing biomechanical knowledge of the foot.
• These clarifications enable more specific and timely therapeutic choices.
• Adopting precise terminology can reduce the risk of iatrogenic complications, particularly concerning the first ray.