Morphological analysis of C2-C7 spinous process bifurcation in Chinese population: a study using three-dimensional reconstruction of computed tomography.

The classification system of SPB in this study proved consistent and reliable, despite the subjective bias. Identifying the cervical level by C6 bifurcation is unreliable, as nearly 80% of C6 SP is non-bifid. Our work provides an accurate and effective anatomical reference for SPB studies in the Chinese population.