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Retroillumination photographs after dilatation at ×16 magnification showing the five templates of interface roughness grade. (a) interface roughness grade – 0 (clear), (b) interface roughness grade – 1 (mild interface roughness), (c) interface roughness grade – 2 (moderate interface roughness), (d) interface roughness grade – 3 (severe interface roughness), (e) interface roughness grade – 4 (severe interface roughness with Bowman's folds in the visual axis)
