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Oral Anatomy and Tooth Morphology MCQs
BDS Professional Review: Core Dental Sciences · BDS / Dentistry · 26 practice questions
- Tooth Morphology Identification
- Dental Tissue Composition and Formation
- Maxillary First Molar Morphology
- Dentition and Eruption
- Mandibular Molar and Premolar Morphology
- Nerve Supply of Teeth
- Nerve Supply of Soft Tissues
- Enamel Structure
1. Following a deep cavity preparation, a dentist notes continued deposition of a mineralized tissue beneath the pulp over subsequent years, mediated by long cellular processes running through microscopic canals. Which structure is responsible for this ongoing deposition?
- AAmeloblasts via enamel rods
- BOdontoblasts via dentinal tubules and Tomes' fibers
- CFibroblasts of the periodontal ligament
- DCementoblasts via Sharpey's fibers
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B. Odontoblasts via dentinal tubules and Tomes' fibers Dentin is formed by odontoblasts throughout life, and contains dentinal tubules with Tomes' fibers (odontoblastic processes), unlike enamel which cannot regenerate.
2. A 6-year-old child presents with a newly erupted large posterior tooth behind the primary second molar, with no primary predecessor having been lost in that region. Which tooth has most likely erupted?
- APrimary second molar
- BMandibular canine
- CFirst permanent molar
- DMaxillary second premolar
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C. First permanent molar The chapter states the first permanent molar erupts at about 6 years, erupting distal to the primary molars without replacing a primary tooth.
3. During an inferior alveolar nerve block, the dentist must direct the needle toward a bony landmark that shields the entrance to the mandibular canal. What is this landmark?
- ALingula
- BMylohyoid ridge
- CMandibular condyle
- DCoronoid process
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A. Lingula The text states the inferior alveolar nerve enters the mandibular foramen guarded by the lingula.
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