Neck vs Head Interspace Ratios in Hallux Valgus: A Reliability Analysis of First Metatarsal Radiographic Measurements.
BACKGROUND The relationship between the intermetatarsal space and first metatarsal width has been proposed as a radiographic parameter for surgical planning in hallux valgus. However, the reproducibility of the previously described Head Interspace Ratio (HIR) has not been formally evaluated, limiting confidence in its...