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 (33)
✍️ Sample DDS Questions & Answers
1. What does the acronym 'BRONJ' refer to in dental practice?
BRONJ (now termed MRONJ—Medication-Related Osteonecrosis of the Jaw) is exposed necrotic bone in patients taking bisphosphonates or antiresorptive agents.
2. A 35-year-old patient has a 5 mm probing depth at a mandibular molar with bleeding on probing and 3 mm of clinical attachment loss. How would you classify this finding?
Stage II periodontitis is characterized by clinical attachment loss of 3–4 mm and probing depths of 5–6 mm.
3. 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.
4. Which type of bone graft uses bone harvested from the same individual receiving the graft?
An autograft (autogenous bone graft) uses bone harvested from the patient's own body (e.g., chin, ramus, iliac crest) and is considered the gold standard for bone regeneration.
5. 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.
6. 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.