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Table 2 Angles of interest measured on X-rays before and after Lapidus procedure

From: The change of first metatarsal head articular surface position after Lapidus arthrodesis

Angle Preoperatively Postoperatively
without Akin with Akin without Akin with Akin
HVA 45.6° ± 20.5° (range 25.0° to 77.0°) 42.7° ± 20.7° (range 28.0° to 56.0°) 26.2° ± 15.1° (range 2.1° to 36.0°) 17.3° ± 11.9° (range 6.6° to 26.6°)
TASA 3.7° ± 8.5° (range − 17.0° to 23.4°) 4.7° ± 8.0° (range − 6.0° to 23.5°) 9.7° ± 6.5° (range − 5.6° to 27.8°) 10.9° ± 8.5° (range − 2.5° to 30.1°)
DASA 1.5° ± 4.1° (range − 9.0° to 20.0°) 1.1° ± 3.8° (range − 5.8° to 7.5°) 4.6° ± 4.1° (range − 8.3° to 15.0°) -4.3° ± 4.8° (range − 13.5° to 5.9°)
  1. HVA – hallux valgus angle, TASA – tangential angle to second axis, DASA – distal articular set angle
  2. values: mean ± standard deviation (range)
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