ABP Cheat Sheet 2026

The 30 highest-yield ABP facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which clinical parameter is MOST useful for determining whether a periodontal maintenance patient is stable or deteriorating over time? → Probing depth changes across visits
2. What does OPSEC stand for? → Operations Security
3. A periodontist seeking ABP candidacy must submit evidence of completing an accredited periodontal residency of at least how many months? → 36 months
4. When determining crown-to-root ratio for strategic tooth retention, what ratio is generally considered the minimum acceptable for a tooth under occlusal load? → 1:2
5. When combining EMD with a bone substitute graft for an intrabony defect, the MOST important clinical rationale is to: → Use the graft as a scaffold to prevent membrane collapse
6. In guided bone regeneration (GBR), the primary function of the membrane is to: → Exclude epithelial and connective tissue cells from the regenerating space
7. Which best describes the role of the AAP in a periodontist's professional development? → It provides specialty guidelines, education, and advocacy resources
8. A patient with Stage III Grade C periodontitis and poorly controlled Type 2 diabetes presents for treatment planning. What is the most appropriate initial step? → Establish glycemic control before initiating periodontal therapy
9. Which factor most strongly predicts tooth loss after periodontal treatment when formulating a long-term prognosis? → Patient compliance with supportive periodontal therapy
10. In active periodontal disease sites, the RANKL-to-OPG ratio is: → Increased, tipping the balance toward net bone resorption
11. What does 'PRN' mean on a prescription? → As needed
12. The 'inside-out' model of regeneration in GTR proposes that PDL cells repopulate the root surface from which direction? → From the apical PDL upward along the root
13. Which entity has the authority to appeal a CODA accreditation decision for a periodontics program? → The sponsoring institution on behalf of the program
14. Which leadership competency is most associated with advancing health policy on behalf of the periodontal specialty? → Advocacy and legislative engagement
15. A clinician detects a 3-wall intrabony defect of 5 mm depth at tooth #30 mesial during re-evaluation post-SRP. What is the most appropriate next step? → Refer for regenerative surgical therapy
16. The cortical plate of the alveolar bone is typically thinnest on which surface of the mandibular anterior teeth? → Buccal cortical plate
17. Which component of the periodontium is considered the principal mechanoreceptor for detecting tooth loading and mediating the periodontal-muscle reflex? → Ruffini endings and mechanoreceptors in the PDL
18. When evaluating a patient for periodontal implant therapy, which factor represents an absolute contraindication to implant placement? → Active head and neck radiation therapy field
19. If a periodontics program fails to correct a CODA-cited deficiency within the required timeframe, what is the likely outcome? → Withdrawal of accreditation
20. Which instrument is specifically designed to remove calculus from furcation areas during periodontal surgery? → Younger-Good 7/8 curette
21. What is the primary purpose of occlusal splint therapy prior to definitive periodontal treatment? → Diagnose and stabilize occlusal relationships before irreversible treatment
22. Which suturing technique is preferred to achieve primary closure over a GBR membrane in a tension-free manner? → Horizontal mattress sutures combined with periosteal releasing incisions
23. What role does ethics play in Regenerative Techniques practice? → It guides professional conduct and protects stakeholders
24. In the full-mouth debridement approach during periodontal maintenance, what is the key advantage of treating all quadrants within 24 hours? → Minimizes bacterial recolonization from untreated sites
25. When performing a gingivectomy, the external bevel incision is made at what angle to the long axis of the tooth? → 45 degrees
26. What is the primary purpose of calculating full-mouth bleeding score (FMBS) during a periodontal evaluation? → To assess gingival inflammation and treatment response
27. In the clinical examination, which of the following is typically required of candidates? → To perform diagnostic procedures and demonstrate the treatment plan for a patient
28. Acellular extrinsic fiber cementum (AEFC) is found predominantly in which region of the root? → Cervical and middle thirds
29. During evaluation of a patient for implant placement, which assessment finding most significantly increases the risk of peri-implantitis? → History of treated periodontitis with residual pockets ≥6 mm
30. What is the primary purpose of professional certification in Surgical Procedures? → To validate competency and knowledge in the field