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Pathology · single question

A panoramic radiograph shows multiple extremely short, 'W-shaped' roots in a patient with no endodontic history. What is the most likely diagnosis?

  1. Dentin dysplasia Type I
  2. Hypophosphatasia
  3. Amelogenesis imperfecta
  4. Regional odontodysplasia
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Correct answer: A. Dentin dysplasia Type I

Dentin dysplasia Type I (radicular type) = severely short/absent roots, obliterated pulp chambers, 'W-shaped' or chevron-pattern root remnants on radiograph. Source confirms: 'dentin dysplasia — raíz en W.'
  • A. CORRECT. Dentin dysplasia Type I = short/absent roots, 'W-shaped' root remnants, obliterated pulp chambers.
  • B. Hypophosphatasia causes premature primary tooth loss due to deficient cementum — not classic W-shape.
  • C. Amelogenesis imperfecta affects ENAMEL only — roots and dentin are normal.
  • D. Regional odontodysplasia = ghost teeth in a localized area — poorly mineralized, not specifically W-shaped roots.

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