Figure 1
From: Effect of gamma irradiation on the wear behaviour of human tooth enamel
Tribological properties of enamel before and after irradiation.
SEM images of scratches in the perpendicular-sectioned enamel slides before and after irradiation, subjected to different normal loads: (a1) Fn = 20 mN before irradiation; (a2) Fn = 20 mN after irradiation; (a3) Fn = 40 mN before irradiation; (a4) Fn = 40 mN after irradiation; (a5) Fn = 60 mN before irradiation; (a6) Fn = 60 mN after irradiation; (a7) Fn = 80 mN before irradiation; and (a8) Fn = 80 mN after irradiation. SEM images of parallel-sectioned enamel slides before and after irradiation, subjected to different normal loads: (b1) Fn = 20 mN before irradiation; (b2) Fn = 20 mN after irradiation; (b3) Fn = 40 mN before irradiation; (b4) Fn = 40 mN after irradiation; (b5) Fn = 60 mN before irradiation; (b6) Fn = 60 mN after irradiation; (b7) Fn = 80 mN before irradiation; and (b8) Fn = 80 mN after irradiation.
