456940.fig.003a
(a)
456940.fig.003b
(b)
456940.fig.003c
(c)
Figure 3: Plain lumbar radiographs taken just after the fusion operation (a), 1 year after the operation (b), and 2 years after the operation (c). There was slight retrolisthesis and decreased posterior disc height on L2/3 on 1-year (b) and 2-year follow-up (c), but with no definite instability (c).