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Orthotic ModificationsEssay Preview: Orthotic ModificationsReport this essayOrthotics and their modificationsModification MethodModified Root — Standard orthotic device – forefoot balanced with a natural arch in line with corrected rearfoot. Posted at NCSP. Mid-foot controlA Medial Skive (Kirby) — Increased supinatory movement around STJ axis to control excessive pronation. Shaving plaster off the medial plantar surface of.