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Tendon shift in hallux valgus: observations at MR imaging
S Eustace1, D Williamson, M Wilson
1Department of Radiology, Boston University Medical Center Hospital, MA 02118, USA.
Skeletal Radiology
|August 1, 1996
Summary
Hallux valgus (bunions) involves a significant shift in the alignment of tendons around the first metatarsophalangeal joint. This tendon displacement correlates with the severity of the bunion deformity.
Area of Science:
- Orthopedics
- Medical Imaging
- Anatomy
Background:
- Hallux valgus, commonly known as a bunion, is a prevalent foot deformity.
- Understanding the biomechanical changes associated with hallux valgus is crucial for effective treatment.
Purpose of the Study:
- To investigate and demonstrate the altered tendon alignment at the first metatarsophalangeal joint in individuals with hallux valgus.
- To correlate the degree of tendon displacement with the severity of the hallux valgus deformity.
Main Methods:
- Prospective study utilizing magnetic resonance imaging (MRI).
- Involved 10 normal feet and 20 feet diagnosed with hallux valgus.
- Analyzed tendon positions relative to the first metatarsophalangeal joint and correlated findings with deformity severity.
Main Results:
- A significant shift in tendon alignment was observed in patients with hallux valgus.
- The abductor hallucis tendon insertion was found to be significantly more plantarward.
- Flexor and extensor tendons exhibited bowstringing at the first metatarsophalangeal joint.
- The extent of tendon displacement correlated with both the hallux valgus angle and clinical severity.
Conclusions:
- Hallux valgus is characterized by a significant, measurable shift in tendon positions around the first metatarsophalangeal joint.
- This tendon displacement appears to be a contributing factor in the development and progression of the hallux valgus deformity.