AAID Associate Fellow Dental Implants Written Exam — Questions and Answers

Question 1: Which intraoral donor site is most commonly used to harvest cortical block bone grafts for ridge augmentation?

Zygomatic arch
Mandibular symphysis or ramus (Correct answer)
Maxillary tuberosity
Iliac crest

Correct answer: Mandibular symphysis or ramus

The mandibular symphysis (chin area) and ramus are the preferred intraoral donor sites for cortical block grafts due to their dense cortical bone quality, proximity to the surgical site, and reduced resorption compared to cancellous sources.

Question 2: Pre-implant orthodontic treatment may be needed to:

Eliminate the need for bone grafting
Create adequate mesiodistal space and align adjacent roots (Correct answer)
Increase bone density
Speed up osseointegration post-surgery

Correct answer: Create adequate mesiodistal space and align adjacent roots

Orthodontics can upright tipped adjacent teeth and open collapsed spaces to provide the necessary room and favorable root angulation for implant placement.

Question 3: Which impression technique captures the three-dimensional position of implants in the mouth using a tray that remains in the mouth during cast separation?

Closed-tray impression
Open-tray (pick-up) impression (Correct answer)
Alginate irreversible hydrocolloid technique
Bite registration technique

Correct answer: Open-tray (pick-up) impression

Open-tray (pick-up) impressions transfer impression copings out with the tray, providing more accurate positional transfer especially for multiple implants.

Question 4: When evaluating a patient for full-arch implant-supported fixed prosthesis (All-on-4), what is the minimum number of implants typically placed per arch?

4 (Correct answer)
2
6
8

Correct answer: 4

The All-on-4 protocol places 4 implants per arch (2 axial anterior, 2 tilted posterior) to support a full-arch fixed prosthesis.

Question 5: Piezoelectric surgery (piezosurgery) during implant site preparation offers the advantage of:

Selective cutting of mineralized tissue while sparing soft tissue (Correct answer)
Providing better implant primary stability
Faster drilling speed
Generating less irrigation need

Correct answer: Selective cutting of mineralized tissue while sparing soft tissue

Ultrasonic piezo devices cut bone with minimal heat and vibration while avoiding laceration of nerves, vessels, and the sinus membrane.

Question 6: Digital implant impressions using intraoral scanners compared to conventional impressions offer:

Elimination of physical impression materials and improved patient comfort (Correct answer)
Lower accuracy for multiple implants
Requirement of impression copings still
Limited use to single tooth cases only

Correct answer: Elimination of physical impression materials and improved patient comfort

Digital scan abutments and intraoral scanners eliminate messy impression materials and provide digital workflows directly to CAD/CAM fabrication.

Question 7: Uncontrolled Type 2 diabetes is considered a relative contraindication for dental implants primarily because:

High glucose destroys titanium implants
Diabetic patients cannot tolerate anesthesia
It causes teeth to fall out faster
It impairs immune response and wound healing, increasing failure risk (Correct answer)

Correct answer: It impairs immune response and wound healing, increasing failure risk

Elevated HbA1c levels correlate with impaired osseointegration, increased infection risk, and delayed healing around implants.

Question 8: What is the purpose of a 'pink porcelain' or 'pink acrylic' component in full-arch implant prostheses?

It prevents bacterial plaque accumulation
It reinforces the metal framework
It replaces lost gingival and bone tissue for esthetic and phonetic support (Correct answer)
It is a cosmetic choice only

Correct answer: It replaces lost gingival and bone tissue for esthetic and phonetic support

Pink prosthetic material mimics gum tissue to replace volumetric loss of soft and hard tissue that occurs after tooth loss and resorption.

Question 9: The 'pink esthetic score' (PES) and 'white esthetic score' (WES) are used to evaluate:

Patient satisfaction with implant treatment
Shade matching in posterior implants
Soft tissue and crown esthetics respectively around anterior implant restorations (Correct answer)
Bone density measurement outcomes

Correct answer: Soft tissue and crown esthetics respectively around anterior implant restorations

PES evaluates peri-implant soft tissue esthetics while WES assesses the visible crown esthetics — together they provide a comprehensive esthetic outcome score.

Question 10: Which post-operative instruction is most critical after implant surgery to prevent infection?

Applying heat packs immediately after surgery
Avoiding all oral hygiene for 2 weeks
Chlorhexidine rinse and prescribed antibiotics as directed (Correct answer)
Eating only on the surgical side to maintain blood supply

Correct answer: Chlorhexidine rinse and prescribed antibiotics as directed

Chlorhexidine rinse reduces bacterial load at the surgical site while antibiotics prevent post-operative infection during the critical early healing phase.

Question 11: When peri-implantitis has caused significant bone loss, which treatment approach aims to regenerate lost bone?

Increasing the implant crown height
Implant removal immediately
Surgical debridement with guided bone regeneration (resective or regenerative surgery) (Correct answer)
Antibiotics alone without surgery

Correct answer: Surgical debridement with guided bone regeneration (resective or regenerative surgery)

Surgical access allows thorough decontamination of the implant surface followed by bone grafting and GBR to attempt to regenerate the lost supporting bone.

Question 12: After a lateral window sinus lift, the window site is typically covered with:

Zinc oxide eugenol dressing
Zinc phosphate cement
Petroleum gauze
A resorbable collagen membrane (Correct answer)

Correct answer: A resorbable collagen membrane

A resorbable collagen membrane is placed over the lateral window to contain the graft, support blood clot formation, and facilitate new bone formation.

Question 13: Implant survival rate at 10 years in healthy patients with proper maintenance is approximately:

99–100%
90–95% (Correct answer)
50–60%
70–75%

Correct answer: 90–95%

Well-documented long-term studies show dental implant 10-year survival rates of 90–95% in healthy patients with regular maintenance, making them a highly predictable treatment.

Question 14: What distinguishes a one-piece implant from a two-piece implant system?

The abutment is integrated into the fixture with no separate component (Correct answer)
Number of threads on the body
Diameter of the implant
Material composition

Correct answer: The abutment is integrated into the fixture with no separate component

One-piece implants combine the fixture and abutment in a single unit, eliminating the micro-gap at the connection but limiting prosthetic versatility.

Question 15: In a two-stage implant protocol, the second-stage surgery involves:

Placing the implant fixture
Cementing the final crown
Removing the cover screw and placing a healing abutment (Correct answer)
Performing the bone graft

Correct answer: Removing the cover screw and placing a healing abutment

Second-stage surgery re-exposes the buried implant, removes the cover screw, and places a healing abutment to prepare the soft tissue for restoration.

Question 16: What is the primary mechanism by which Guided Bone Regeneration (GBR) achieves bone growth?

Delivering antibiotics directly to the surgical site
Using barrier membranes to exclude fast-proliferating soft tissue cells (Correct answer)
Increasing blood supply through vascular growth factors
Stimulating implant surface bioactivity

Correct answer: Using barrier membranes to exclude fast-proliferating soft tissue cells

GBR barrier membranes physically exclude fast-proliferating epithelial and fibroblastic cells from the bone defect, creating a protected space where slower-growing osteogenic cells can regenerate bone.

Question 17: What is the minimum residual bone height above the mandibular canal recommended before implant placement in the posterior mandible?

2 mm (Correct answer)
10 mm
1 mm
5 mm

Correct answer: 2 mm

A minimum of 2 mm safety margin above the inferior alveolar nerve canal is required to prevent nerve injury during implant placement.

Question 18: In the context of simultaneous implant placement with bone grafting, what does 'primary stability' refer to?

The initial mechanical anchorage of the implant achieved through bone compression at the time of placement (Correct answer)
The biological bond between the implant surface and new bone after osseointegration is complete
The stability of the GBR membrane during the bone healing period
The chemical bond between alloplast graft material and the titanium implant surface

Correct answer: The initial mechanical anchorage of the implant achieved through bone compression at the time of placement

Primary stability refers to the initial mechanical retention of the implant in bone achieved at the time of surgical placement through friction and compression; it is critical when grafting simultaneously with implant insertion to ensure the implant remains immobile during the healing period.

Question 19: Maxillary anterior single implant esthetic failures are most commonly caused by:

Over-tightening the abutment screw
Labial bone loss and gingival recession exposing the implant or metal collar (Correct answer)
Using zirconia instead of porcelain fused to metal
Incorrect shade matching of the crown

Correct answer: Labial bone loss and gingival recession exposing the implant or metal collar

Loss of the thin labial plate of bone leads to gingival recession, exposing the implant shoulder or creating asymmetrical gum levels that compromise esthetics.

Question 20: What is the primary benefit of incorporating platelet-rich fibrin (PRF) or platelet-rich plasma (PRP) into bone grafting procedures?

It permanently replaces the need for barrier membranes in GBR
It eliminates the need for bone graft particulate material entirely
It concentrates autologous growth factors that may accelerate tissue healing (Correct answer)
It provides a long-lasting osteoconductive scaffold for bone formation

Correct answer: It concentrates autologous growth factors that may accelerate tissue healing

PRF and PRP are prepared from the patient's own blood and concentrate growth factors such as PDGF, TGF-β, and VEGF; when used as adjuncts in grafting procedures, they may promote angiogenesis and accelerate graft healing and maturation.

Question 21: What does DFDBA stand for, and what is its primary property that distinguishes it from mineralized bone allograft?

Denatured freeze-dried bone alloplast; primarily osteoconductive due to mineral matrix
Demineralized fresh-dried bone allograft; primarily osteogenic due to preserved osteoblasts
Densified fresh-dried bone autograft; primarily osteogenic due to living cells
Demineralized freeze-dried bone allograft; primarily osteoinductive due to exposed BMPs (Correct answer)

Correct answer: Demineralized freeze-dried bone allograft; primarily osteoinductive due to exposed BMPs

DFDBA (Demineralized Freeze-Dried Bone Allograft) is processed to remove its mineral content, which exposes bone morphogenetic proteins (BMPs) and other growth factors embedded within the bone matrix, conferring significant osteoinductive properties in addition to its osteoconductive scaffold.

Question 22: Bisphosphonate use is a significant concern for implant patients because it can cause:

Implant corrosion
Medication-related osteonecrosis of the jaw (MRONJ) (Correct answer)
Excessive bone overgrowth around implants
Implant rejection

Correct answer: Medication-related osteonecrosis of the jaw (MRONJ)

Bisphosphonates suppress bone turnover and can lead to MRONJ, particularly after dentoalveolar surgery including implant placement.

Question 23: What is the purpose of micro-threads in the coronal portion of some implant designs?

Reduce insertion torque
Improve osseointegration at the apex
Preserve crestal bone by transferring functional stress (Correct answer)
Increase apical stability

Correct answer: Preserve crestal bone by transferring functional stress

Micro-threads at the implant neck help transfer functional stresses to the crestal bone, stimulating bone maintenance and reducing marginal bone loss.

Question 24: What is the recommended torque value range for tightening most implant abutment screws?

15–35 Ncm (Correct answer)
5–10 Ncm
50–70 Ncm
80–100 Ncm

Correct answer: 15–35 Ncm

Most manufacturers recommend abutment screw torque of 15–35 Ncm to ensure proper seating without stripping or fatigue fracture.

Question 25: Which factor most significantly affects long-term implant success in the esthetic zone?

Implant diameter
Crown material selection
Preservation of inter-proximal papillae and labial bone (Correct answer)
Abutment torque value

Correct answer: Preservation of inter-proximal papillae and labial bone

Maintaining the inter-dental papilla and labial bony plate is critical for natural esthetics — black triangles and tissue collapse are primary esthetic failures.

Question 26: The 'window of osseointegration' loading protocol means:

Only provisional restorations are ever allowed on implants
Loading must occur within 24 hours
The implant must never be loaded before 1 year
Loading should occur after adequate osseointegration (typically 3–6 months) but before excessive fibrous integration (Correct answer)

Correct answer: Loading should occur after adequate osseointegration (typically 3–6 months) but before excessive fibrous integration

Timing implant loading within the optimal window — after sufficient biological integration but before disuse atrophy — maximizes long-term success.

Question 27: The biologic width around a dental implant consists of:

Only the sulcular epithelium
Bone and overlying mucosa only
Keratinized gingiva exclusively
Junctional epithelium and connective tissue attachment forming the peri-implant seal (Correct answer)

Correct answer: Junctional epithelium and connective tissue attachment forming the peri-implant seal

The peri-implant biologic width includes the sulcular epithelium, junctional epithelium, and supracrestal connective tissue that protect the underlying bone.

Question 28: Which prosthetic material is most commonly used for implant-supported crowns in the posterior region due to its strength?

Composite resin
Full-cast gold
Monolithic zirconia (Correct answer)
Feldspathic porcelain

Correct answer: Monolithic zirconia

Monolithic zirconia is preferred posteriorly for its high fracture resistance, low chipping rate, and excellent wear properties under heavy occlusal load.

Question 29: Cantilever extensions on implant-supported fixed prostheses should be limited to reduce:

Implant diameter requirements
Esthetic concerns
Bending moments and stress concentration at the most distal implant (Correct answer)
Number of implants needed

Correct answer: Bending moments and stress concentration at the most distal implant

Cantilever length creates bending stress that multiplies at the distal implant; excessive cantilevers can cause screw loosening, fracture, and bone loss.

Question 30: Zirconia implants compared to titanium implants offer which primary advantage?

Lower cost
Superior osseointegration
Better esthetics in thin gingival biotypes (Correct answer)
Higher fracture resistance

Correct answer: Better esthetics in thin gingival biotypes

Zirconia's tooth-colored appearance eliminates the gray shadow sometimes visible through thin gum tissue, making it preferred for esthetic zones.

AAID Associate Fellow Dental Implants Written Exam

The American Academy of Implant Dentistry (AAID) Part 1 Written Exam tests dental professionals on clinical knowledge and application of implant dentistry, covering basic sciences, diagnostics, prosthetics, and surgical techniques required for Associate Fellow credentialing.

Questions

35 min

Time Limit

70%

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