Correlation between first tarsometatarsal joint mobility and hallux valgus severity

Area of Science:

• Orthopedics
• Biomechanics
• Medical Imaging

Background:

• Hallux valgus severity is linked to first tarsometatarsal (TMT1) joint mobility.
• Objective quantification of TMT1 mobility is crucial for understanding hallux valgus.
• A novel ultrasound test offers a quantifiable measure of TMT1 joint sagittal mobility.

Purpose of the Study:

• To investigate the relationship between TMT1 joint mobility, measured by ultrasound, and the severity of hallux valgus.
• To test the hypothesis that TMT1 joint mobility increases with hallux valgus severity.

Main Methods:

• Forty-nine feet with hallux valgus were assessed.
• Clinical load transfer (LT) and radiographic intermetatarsal angle (IMA) and hallux valgus angle (HVA) were evaluated.
• TMT1 joint mobility was quantified using a specialized ultrasound test.

Main Results:

• Ultrasound TMT1 mobility values differed significantly across clinical LT severity groups (no LT, M2 LT, M3+ LT).
• TMT1 mobility showed a significant correlation with IMA, a radiographic measure of severity.
• No significant correlation was found between TMT1 mobility and HVA.

Conclusions:

• Increased TMT1 joint mobility is associated with greater hallux valgus severity.
• The ultrasound test effectively quantifies TMT1 mobility, correlating with clinical and radiographic findings.
• TMT1 joint mobility appears to play a causal role in the development of hallux valgus.