BDS 1st Year - DADH Important Questions

SECTION A: Long Essay Questions (LEQ) - 10 Marks each

Oral Histology

1. Describe the histology of enamel - include enamel prisms, enamel rods, Hunter-Schreger bands, lines of Retzius, incremental lines, neonatal line, enamel tufts, lamellae, and spindles.
2. Describe the histology of dentin - include dentinal tubules, peritubular and intertubular dentin, predentin, primary, secondary and tertiary dentin, interglobular dentin (Czermak spaces), incremental lines (von Ebner, Owen's contour lines).
3. Describe the histology of dental pulp - zones of pulp (odontoblastic, cell-free/Weil's zone, cell-rich zone, pulp core), cell types, nerves, vessels, functions and age changes.
4. Describe the histology of cementum - types (acellular/cellular), cementoblasts, Sharpey's fibers, cementocytes, incremental lines, and functions.
5. Describe the histology of periodontal ligament (PDL) - fiber groups (principal fiber groups - alveolar crest, horizontal, oblique, apical, interradicular), cell types, functions, blood supply, and age changes.
6. Describe the histology of oral mucosa - types (masticatory, lining, specialized), layers of stratified squamous epithelium, differences in keratinized vs non-keratinized mucosa.
7. Describe the histology of salivary glands - types (parotid, submandibular, sublingual), serous, mucous, mixed acini, duct system (intercalated, striated/granular, excretory ducts), myoepithelial cells.

Dental Development & Embryology

1. Describe the development of tooth - stages: initiation, proliferation, histodifferentiation, morphodifferentiation, apposition, calcification/mineralization, and eruption.
2. Describe the development of enamel (Amelogenesis) - presecretory, secretory, and maturation stages; role of ameloblasts; enamel proteins (amelogenin, enamelin).
3. Describe the development of dentin (Dentinogenesis) - role of odontoblasts; primary, secondary, reparative dentin formation.
4. Describe the eruption of teeth - theories of eruption (root elongation theory, cushion hammock ligament, PDL traction, vascular/hydrostatic pressure); active and passive eruption; factors affecting eruption.
5. Describe the development of the face - facial processes, branchial arches, fusion, common developmental anomalies (cleft lip, cleft palate).

Tooth Morphology

1. Describe the morphology of maxillary first molar - most frequently asked; include crown, roots, pulp chamber, cusp of Carabelli.
2. Describe the morphology of mandibular first molar - crown, cusps, roots, pulp anatomy.
3. Describe the morphology of maxillary central incisor - with labeled diagram.
4. Describe the morphology of mandibular first premolar - transverse ridge, mesiolingual groove.

SECTION B: Short Essay Questions (SEQ) - 5 Marks each

Oral Histology - SEQ

1. Enamel tufts, lamellae, and spindles (differences and clinical significance)
2. Lines of Retzius and their significance
3. Hunter-Schreger bands
4. Neonatal line (its significance in forensic dentistry)
5. Dead tracts in dentin
6. Sclerotic (transparent) dentin
7. Interglobular dentin (Czermak spaces)
8. Sharpey's fibers
9. Cementodentinal junction (CDJ)
10. Cementoenamel junction (CEJ) - 3 types with percentages
11. Hertwig's epithelial root sheath (HERS) and its role in root formation
12. Reduced enamel epithelium and its significance
13. Junctional epithelium
14. Oral epithelium - cell types (keratinocytes, Langerhans cells, Merkel cells, melanocytes)
15. Reticular lamina and basal lamina
16. Masticatory mucosa vs lining mucosa
17. Serous vs mucous acini
18. Striated ducts and their function
19. Minor salivary glands
20. Age changes in dental pulp
21. Age changes in dentin
22. Age changes in periodontium

Dental Development - SEQ

1. Dental lamina and its fate
2. Enamel organ - layers (outer enamel epithelium, stellate reticulum, stratum intermedium, inner enamel epithelium)
3. Dental papilla and dental sac/follicle
4. Cap stage vs bell stage of tooth development
5. Successional lamina
6. Epithelial rests of Malassez (ERM)
7. Role of neural crest cells in tooth development
8. Theories of eruption of teeth
9. Passive eruption
10. Ankylosis of teeth
11. Deciduous vs permanent teeth differences (eruption chart)
12. Development of periodontium
13. Development of alveolar bone
14. Development of palate and cleft palate

Tooth Morphology - SEQ

1. Cusp of Carabelli (trait, significance)
2. Tomes' process (Tomes' root and crown process)
3. Angle's classification
4. Black's cavity classification
5. Nance's leeway space
6. Mixed dentition period
7. Chronology of eruption of primary teeth
8. Chronology of eruption of permanent teeth
9. Differences between primary and permanent teeth
10. Multicuspal vs monocuspal teeth
11. Comparison of maxillary and mandibular first molars
12. Mamelon and its significance

SECTION C: Short Answer Questions (SAQ) / Viva / 2-3 Mark Questions

1. Define and classify oral mucosa
2. What is the neonatal line?
3. What are Tomes' granular layer?
4. What is the role of cementum?
5. What is the function of PDL?
6. Name the principal fiber groups of PDL
7. What is Hertwig's root sheath?
8. What is reduced enamel epithelium?
9. What is the difference between acellular and cellular cementum?
10. What are the zones of dental pulp?
11. Name the cells found in dental pulp
12. What is the significance of incremental lines?
13. What is dead tract?
14. What is the function of striated ducts?
15. What is a Stafne bone cyst (static bone cyst)?
16. What is the chronological age vs dental age?
17. What is the role of matrix vesicles in mineralization?
18. Name the enamel proteins
19. What is the difference between primary and secondary dentin?
20. Define and classify salivary glands

SECTION D: Frequently Repeated "Theories" Topics

EXAM STRATEGY TIPS

• Diagrams are mandatory for long essays - always draw labeled diagrams for enamel histology, PDL fiber groups, tooth development stages, and tooth morphology.
• Histology + Development carries more marks than morphology in most universities.
• Salivary glands (both structure and function) are high-yield every year.
• PDL fiber groups is almost always a short essay.
• CEJ types and clinical significance is a frequent short note.
• The development of tooth (all stages with diagrams) is a near-certain long essay.
• Age changes (in pulp, dentin, enamel) are common short notes.