Classification of Hallucal Sesamoid Bone Correlated with Hallux Valgus Severity

Table 1

Frequency of HVA and IMA severity in each classification found in 3D CT images.

	HVA (°)			IMA (°)
	Mild	Moderate	Severe	Mild	Moderate	Severe
I	0	0	0	0	0	0
II	0	1	0	1	0	0
IIIa	40	2	0	41	1	0
IIIb	94	4	0	95	3	0
IV	5	2	0	7	0	0

Note: mild (grade) in HVA is less than 25 degrees, moderate (grade) in HVA is between 25 and 35 degrees, and severe (grade) in HVA is more than 35 degrees; mild (grade) in IMA is less than 15 degrees, moderate (grade) in IMA is between 15 and 20 degrees, and severe (grade) in IMA is more than 20 degrees.