ABP Study Guide 2026
Everything you need to pass the ABP 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.
📚 ABP Topics to Study (69)
✍️ Sample ABP Questions & Answers
1. Which of the following best describes a Stage IV periodontitis case?
Stage IV is the most severe stage and is distinguished by complexity factors that can lead to masticatory dysfunction, such as bite collapse or flaring.
2. The 'biological width' concept is relevant to regenerative therapy because violation of it can lead to:
Violation of biological width by restorative margins triggers a chronic inflammatory response that results in bone resorption as the periodontium attempts to re-establish the 2mm of supracrestal attachment.
3. Neutrophil extracellular traps (NETs) in the context of periodontal disease:
While NETs trap and kill periodontal pathogens, the citrullinated histones, DNA scaffolds, and granule proteins they release also damage host tissue, activate the complement system, and sustain chronic inflammation.
4. A patient develops retrograde peri-implantitis 3 months after implant placement. The most likely etiology is:
Retrograde peri-implantitis most commonly results from contamination by periapical pathogens from a pre-existing lesion on an adjacent tooth migrating to the implant apex.
5. Which cells are primarily responsible for maintaining and remodeling the alveolar bone proper (bundle bone) adjacent to the PDL?
Alveolar bone remodeling is carried out by coordinated activity of osteoblasts (bone formation) and osteoclasts (bone resorption), regulated by local and systemic signals.
6. The Summers osteotome sinus floor elevation technique relies on which principle to elevate the sinus membrane?
The Summers technique uses sequentially larger osteotomes to condense and infracture the sinus floor, elevating the membrane via the crestal approach.