Results
erosion
EROSION
The mean step height values are summarised in Mean step height (and standard deviation) in µm, representing enamel wear, for all four experimental cycles on both polished and natural enamel samples. 'X' in the natural group, subjected to abrasion only, denotes instances where no measurement could be recorded.Comparison of polished vs natural enamel following progressive step height change for erosion only group and erosion + abrasion group.SEM images were taken to provide qualitative images to investigate the underlying morphology of the prismatic and interprismatic enamel be observed for samples exposed to erosion and erosion/abrasion in SEM comparisons of prism structure in each treatment group (all samples acid-etched with HCL to reveal prism morphology The figures on the left (A,C,E,G) show x350 magnification and the figures on the right (B,D,F,H) show x750 magnification of polished eroded enamel, natural eroded enamel, polished eroded abraded enamel and natural eroded abraded enamel respectively. The dashed line depicts where the depth to which the subsurface prisms have been effected.Polished, eroded enamel showed evidence of underlying prism disruption at depths of approximately 10–20 µm below the surface, with the asterisk demarking where the boundary between the reference and lesion surfaces was visible (