Research Article

Classification of Hallucal Sesamoid Bone Correlated with Hallux Valgus Severity

Figure 4

The types of HSBs on inferior by 3D CT image. Type I: no HSB; type II: with one HSB; type IIIa: with two HSBs when THB is bigger; type IIIb: with two HSBs when FHB is bigger; and type IV: with three HSBs. All HSBs are circled in red.