Nonunion — Weber & Cech Classification
Viable (hypertrophic/oligotrophic) vs non‑viable (atrophic, necrotic, defect, comminuted). Radiographic callus indicates biology; absence suggests poor biology. Guides treatment: stability alone for viable; add graft/biologics for non‑viable. viable → improve stability; nonviable → improve stability + add biology.
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10What is the primary classification system used to categorize nonunions based on biological activity?
mcqIn the Weber & Cech classification, which type of nonunion is characterized by excellent vascularity and abund...
mcqWhat is the primary treatment principle for a hypertrophic nonunion?
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mcqWhich of the following factors is NOT part of the 'diamond concept' that contributes to fracture healing?
mcqWhat is the recommended treatment for an oligotrophic nonunion?
mcqWhich of the following conditions is considered a systemic factor that can contribute to nonunion?
mcqIn the context of nonunion treatment, what is the significance of radiographic callus formation?
mcqWhich type of nonunion is characterized by a lack of vascularity and biological activity, often requiring both...
mcqWhat is the FDA definition of a nonunion?