Give answer of this question for ms orthopaedic university examination long question
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"scaphoid nonunion" AND management
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This is a comprehensive, examination-ready long answer covering all major components that MS Orthopaedics examiners expect. Here's a quick guide to what's covered:
Structure of the answer:
Introduction — definition and incidence
Anatomy & Blood Supply — the essential foundation explaining why nonunion occurs
Risk Factors — in a table for quick recall
Classification — Herbert & Fisher (the most tested classification)
Pathomechanics — humpback deformity, DISI, and SNAC staging (I–III)
Clinical Features & Investigations — including the role of CT, MRI, and intraoperative assessment
Management — organized by type:
Fixation alone (Type D1)
Non-vascularized bone graft (Matti-Russe, Fisk-Fernandez)
Vascularized bone graft (1,2-ICSRA, MFC free flap)
Fixation technique (screw vs. K-wire vs. plate)
Arthroscopic-assisted (emerging)
Salvage for SNAC wrist — by stage
Operative steps for Fisk-Fernandez (commonly asked)
Prognosis, complications, outcomes
Decision algorithm
Current evidence citations (3 systematic reviews/meta-analyses from 2022–2023)
Varus deformity for long case examination
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"cubitus varus" AND osteotomy
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