738954.fig.006a
(a)
738954.fig.006b
(b)
738954.fig.006c
(c)
738954.fig.006d
(d)
738954.fig.006e
(e)
738954.fig.006f
(f)
738954.fig.006g
(g)
738954.fig.006h
(h)
738954.fig.006i
(i)
738954.fig.006j
(j)
Figure 6: SEM surface morphologies of unstressed and stressed composite arch wires immersed in artificial saliva with different pH: ((a)–(e)) pH = 4.0; ((f)–(j)) pH = 6.75.