100+ Free ABOI/ID Practice Questions

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Question 1

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Which approach is preferred for managing a wide alveolar ridge defect when implants will be placed in a delayed fashion?

Particulate graft and barrier membrane GBR with delayed placement

No treatment, monitor only

Cement a denture over the defect

Place implant immediately with no augmentation

to track

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2026 Statistics

Key Facts: ABOI/ID Exam

200

Part I MCQ

Pearson VUE delivery

~$2,500

Part I Fee

ABOI/ID

D1-D4

Lekholm-Zarb

Bone quality classification

≥2 mm

IAN Safety

Posterior mandible CBCT

ABOI/ID is the implant dentistry diplomate credential (ABDS-recognized). Part I: 200 MCQ via Pearson VUE, ~4 hours, ~$2,500. Master Lekholm-Zarb bone classification (D1-D4), ISQ stability (≥70), sinus lift indications (lateral window ≤4 mm bone, Summers crestal ≥5 mm), All-on-4 protocol, IAN safety margin (≥2 mm), peri-implantitis treatment (no metal scalers), and MRONJ risk assessment.

Sample ABOI/ID Practice Questions

Try these sample questions to test your ABOI/ID exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which clinician is credited with coining the term 'osseointegration' to describe the direct structural connection between living bone and a load-bearing titanium implant surface?

A.Per-Ingvar Branemark

B.Andre Schroeder

C.Leonard Linkow

D.Carl Misch

Explanation: Branemark, working at the University of Gothenburg in the 1960s, observed that titanium chambers became inseparable from rabbit bone and subsequently coined the term 'osseointegration', defined as direct bone-to-implant contact at the light-microscopic level.

2In the Lekholm and Zarb bone classification, which bone quality describes thin cortical bone surrounding a core of low-density trabecular bone and is associated with the lowest implant primary stability?

A.D1

B.D2

C.D3

D.D4

Explanation: D4 bone consists of a thin cortical layer surrounding sparse, low-density trabecular bone. It is most commonly encountered in the posterior maxilla and is associated with reduced primary stability and a higher early failure rate.

3Which imaging modality is considered the standard of care for preoperative evaluation of dental implant placement in the posterior mandible because it provides three-dimensional visualization of the inferior alveolar canal?

A.Periapical radiograph (PA)

B.Panoramic radiograph

C.Cone-beam computed tomography (CBCT)

D.Lateral cephalogram

Explanation: CBCT provides true three-dimensional, low-distortion imaging that allows accurate measurement of bone height, width, and the position of the inferior alveolar canal and mental foramen, including the anterior loop. It is recommended whenever a 2D image cannot reliably exclude proximity to vital structures.

4What is the generally accepted minimum safety distance from the apical tip of a posterior mandibular implant to the superior border of the inferior alveolar canal?

A.0.5 mm

B.1 mm

C.2 mm

D.5 mm

Explanation: A 2 mm safety zone superior to the inferior alveolar canal is the widely accepted standard. This buffer accommodates measurement error, drill overshoot, and the neurovascular bundle's anatomic variability while minimizing risk of paresthesia.

5Which of the following is the most commonly used commercially available titanium grade for endosseous root-form dental implants?

A.Grade 1 commercially pure titanium

B.Grade 4 commercially pure titanium

C.Grade 5 Ti-6Al-4V alloy

D.Cobalt-chromium alloy

Explanation: Grade 5 Ti-6Al-4V (titanium with 6% aluminum and 4% vanadium) offers significantly higher tensile and fatigue strength than commercially pure titanium and is the most common alloy for modern root-form implants. Grade 4 cpTi is also frequently used, particularly for narrow-diameter and one-piece designs.

6An ISQ (Implant Stability Quotient) value measured by resonance frequency analysis is generally considered indicative of a stable, loadable implant when it is at or above what threshold?

A.40

B.55

C.70

D.90

Explanation: Conventional Osstell guidance considers ISQ values of 70 or higher as indicating high stability suitable for loading. Values between 60-70 are transitional, and below 60 are considered low/unstable.

7When evaluating a potential implant patient, which medical condition has the strongest evidence base for impairing osseointegration and increasing implant failure?

A.Treated hypothyroidism

B.Heavy active cigarette smoking

C.Stable type II diabetes with HbA1c 6.2%

D.Hypertension controlled with an ACE inhibitor

Explanation: Heavy active cigarette smoking is consistently associated with impaired wound healing, reduced bone-to-implant contact, and higher failure rates. Patients should be counseled on cessation prior to and following implant placement.

8What is the typical recommended buccal bone thickness over a dental implant in the esthetic zone to minimize the risk of recession and gray show-through?

A.0.5 mm

B.1 mm

C.2 mm

D.5 mm

Explanation: A buccal bone thickness of at least 2 mm is generally recommended in the esthetic zone. Thinner facial plates predispose to resorption, recession, and gray transmission of the underlying titanium.

9On a CBCT scan of the anterior mandible, which anatomic feature must be carefully identified before planning implants in the parasymphyseal region to avoid paresthesia of the lower lip?

A.Anterior loop of the mental nerve

B.Greater palatine foramen

C.Mylohyoid ridge

D.Pterygoid hamulus

Explanation: The mental nerve frequently extends mesial to the mental foramen as an anterior loop before exiting. CBCT identification is essential because failure to account for the loop can result in nerve injury and lower lip paresthesia.

10A patient presents with a history of intravenous zoledronate therapy for metastatic bone disease. Regarding implant placement, which statement is most accurate?

A.IV bisphosphonate use is a strong relative contraindication due to MRONJ risk

B.IV bisphosphonates have no effect on implant prognosis

C.Implants should always proceed without modification

D.IV bisphosphonates only affect mandibular sites, not maxillary

Explanation: IV bisphosphonates such as zoledronate carry a substantially elevated risk of medication-related osteonecrosis of the jaw (MRONJ) compared with oral agents. Elective implant placement is generally considered a strong relative contraindication and requires informed consent and careful interdisciplinary planning.

About the ABOI/ID Exam

ABOI/ID Diplomate certification for implant dentistry — recognized by the American Board of Dental Specialties (ABDS), tens of thousands of implant dentists in the US. Two-part exam: Part I written (200 MCQ via Pearson VUE) covers diagnostic data, treatment planning, surgical implementation, maintenance, and complications. Part II is oral case defense. Tests mastery of osseointegration, implant materials (cpTi, Ti-6Al-4V), bone classification (Lekholm-Zarb D1-D4), sinus lift (lateral window, Summers crestal), GBR, immediate vs delayed placement, All-on-4, peri-implantitis management, and CBCT-based implant planning.

Questions

200 scored questions

Time Limit

~4 hours

Passing Score

Scaled (ABOI/ID-set)

Exam Fee

~$2,500 Part I (ABOI/ID via Pearson VUE)

ABOI/ID Exam Content Outline

44%

Implementation (Surgical)

Placement protocols, sinus lift (lateral/crestal), GBR, ridge preservation, immediate placement, anesthesia

18%

Treatment Planning

Case selection, prosthetic-driven planning, surgical guides, immediate vs delayed protocols

15%

Diagnostic Data

Patient assessment, medical history, CBCT/pano/PA imaging, Lekholm-Zarb bone quality

15%

Complications

Peri-implantitis, mucositis, IAN injury, sinus complications, prosthetic failures

Maintenance

Peri-implant maintenance, hygiene protocols (no metal scalers), occlusion, abutment selection

How to Pass the ABOI/ID Exam

What You Need to Know

Passing score: Scaled (ABOI/ID-set)
Exam length: 200 questions
Time limit: ~4 hours
Exam fee: ~$2,500 Part I

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ABOI/ID Study Tips from Top Performers

1Master Lekholm-Zarb D1-D4 bone classification and how it drives osseointegration time + loading protocol

2Memorize sinus lift selection: lateral window for ≤4 mm residual bone; Summers crestal for ≥5 mm

3Drill IAN safety: ≥2 mm to canal; CBCT mandatory for posterior mandible; identify anterior loop

4Know peri-implantitis treatment: NO metal scalers; plastic curettes; glycine/erythritol air polishing; resective vs regenerative surgery

5Apply All-on-4 (Maló): 2 axial anterior + 2 tilted posterior (up to 30°) avoiding sinus/IAN

Frequently Asked Questions

What is the Lekholm-Zarb bone classification?

Lekholm-Zarb classifies jaw bone quality: D1 (homogeneous compact bone — typically anterior mandible), D2 (thick cortical with dense trabecular core — posterior mandible), D3 (thin cortical with dense trabecular — maxillary anterior/premolar), D4 (thin cortical with sparse trabecular — posterior maxilla, worst). D1/D2 give best primary stability and shortest osseointegration time; D4 requires extended healing and may not support immediate loading.

When is a lateral window sinus lift vs Summers crestal indicated?

Lateral window (Caldwell-Luc style) sinus lift indicated when residual sub-sinus bone is ≤4 mm or when extensive grafting (>4 mm vertical augmentation) is needed — direct visualization of Schneiderian membrane, particulate or block graft, ~6-9 month integration. Summers crestal/osteotome technique indicated when ≥5 mm residual bone is present and only ≤4 mm vertical augmentation is needed — less invasive, blind elevation through implant osteotomy, particulate graft. Membrane perforation rates 10-30% (higher with lateral).

What is the IAN safety margin for posterior mandible implants?

Maintain ≥2 mm of bone between the implant apex and the inferior alveolar nerve (IAN) canal — measured on CBCT cross-sectional reconstruction. CBCT is mandatory for posterior mandibular implant planning. Identify the anterior loop of the mental nerve (0-9 mm extension) before placing implants near the mental foramen. Violation causes paresthesia/dysesthesia/anesthesia of the chin and lower lip — often permanent.

How should I study for ABOI/ID Part I?

Plan 300-500 hours over 6-12 months. Focus weighted study on Implementation/Surgical (44%) — nearly half the exam. Master sinus lift protocols (lateral vs Summers), All-on-4 (Maló protocol with tilted posterior implants), GBR membrane/graft selection, immediate placement timing (Type 1-4 per Hammerle), and peri-implantitis treatment (NO metal scalers — use plastic curettes, glycine/erythritol air polishing). Pair didactic study with continued surgical experience and CBCT case review.