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Dependence of ankle joint width on plantar flexion
F Farsø Nielsen1, A de Carvalho
1Department of Orthopaedic Surgery, Municipal Hospital of Aarhus, University of Aarhus, Denmark.
Acta Radiologica (Stockholm, Sweden : 1987)
|September 1, 1989
Summary
Ankle joint width increases with plantar flexion, a key factor in accurately diagnosing ankle osteoarthrosis. Proper positioning is crucial for reliable joint space measurements.
Area of Science:
- Orthopedics
- Radiology
- Biomedical Engineering
Background:
- Joint space narrowing is an early radiographic indicator of ankle osteoarthrosis.
- Accurate measurement of ankle joint width is essential for diagnosis and monitoring.
- The influence of ankle positioning on joint space measurement requires further investigation.
Purpose of the Study:
- To investigate the relationship between ankle joint width and plantar flexion.
- To determine the effect of 25 degrees of plantar flexion on ankle joint space.
- To assess the importance of standardized ankle positioning for accurate joint width estimation.
Main Methods:
- Standardized anteroposterior radiographic views of the left ankle were obtained.
- 30 healthy adult volunteers participated in the study.
- Ankle positioning included neutral and 25 degrees plantar flexion.
Main Results:
- Average joint width in neutral position was 2.7 mm for women and 3.0 mm for men.
- A 25% increase in joint width was observed with 25 degrees of plantar flexion.
- Ankle positioning significantly impacts joint space width.
Conclusions:
- Plantar flexion increases ankle joint width, affecting radiographic measurements.
- Standardized ankle positioning is critical for accurate assessment of ankle joint space.
- These findings have implications for the early detection and management of ankle osteoarthrosis.