Nails Structure & DisordersOnline version Milady ch. 9&10 by Charla Jordan 1 NaiL Disorders 2 NaiL Diseases 3 Natural Nail Unit 4 nail shapes Blue Fingernails eggshell nails Melanonychia onychophagy Ridges nail Pterygium Onychocryptosis Onychomadesis Paronychia Tinea Pedis Nail Psoriasis Onychomycosis nail bed nail plate hyponychium nail folds matrix eponychium concave convex narrow tubular square trapezoid