The Surgical Treatment Principles of Atlantoaxial Instability Focusing on Rheumatoid Arthritis

Figure 4

Preop lateral radiograph revealed AAI (a). Second day postop radiographs showed malposition of left C2 screw (asterisk) ((b) and (c)). Two weeks postop radiographs for follow-up of the fusion condition ((d) and (e)). Six weeks postop open mouth radiograph revealed loosening of left C2 screw (f).

(a)

(b)

(c)

(d)

(e)

(f)