DDS Study Guide 2026
Everything you need to pass the DDS exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 DDS Exam Format at a Glance
📚 DDS Topics to Study (21)
✍️ Sample DDS Questions & Answers
1. Guided tissue regeneration (GTR) barrier membranes function by:
GTR membranes selectively block fast-migrating epithelial and connective tissue cells, allowing slower-growing PDL and bone cells to repopulate the defect for true regeneration.
2. Nitrous oxide (N₂O) produces analgesia and sedation primarily by:
N₂O exerts its effects via potentiation of GABA-A inhibitory neurotransmission and antagonism of NMDA (glutamate) receptors, reducing pain transmission and producing anxiolysis.
3. Molar-incisor hypomineralization (MIH) affects which teeth?
MIH is defined by demarcated qualitative enamel defects affecting one to four first permanent molars, frequently accompanied by affected permanent incisors.
4. The term 'leukoplakia' in oral pathology refers to:
Leukoplakia is a clinical term for a white patch that cannot be rubbed off and cannot be characterized as any other definable disease, requiring biopsy for definitive diagnosis.
5. In a healthy periodontium, the apical termination of the junctional epithelium coincides with the:
Under healthy conditions, the apical end of the junctional epithelium is located at the CEJ, with no apical migration onto the root surface.
6. Silver diamine fluoride (SDF) arrests dental caries primarily by:
SDF arrests caries through dual action: fluoride ion remineralizes and hardens enamel/dentin while silver ions (Ag+) provide broad-spectrum antimicrobial activity against cariogenic bacteria.