Implant Dentistry Flashcards
7 cards from real ABP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Implant Dentistry flashcards as text
Guided bone regeneration (GBR) membranes function primarily by:
Answer: Excluding non-osteogenic cells from the healing space
GBR membranes act as physical barriers that exclude rapidly proliferating epithelial and connective tissue cells, allowing osteogenic cells to repopulate the defect.
Which anatomical structure is most at risk during sinus floor elevation via the lateral window approach?
Answer: Schneiderian membrane
The Schneiderian membrane (sinus mucosa) is the primary structure at risk during lateral sinus augmentation; perforation significantly increases complication rates.
According to the ITI consensus, a residual bone height of at least how many millimeters allows implant placement simultaneously with osteotome sinus floor elevation?
Answer: 5 mm
The ITI recommends a minimum residual bone height of 5 mm to achieve adequate primary stability when performing simultaneous implant placement with the osteotome technique.
A patient develops retrograde peri-implantitis 3 months after implant placement. The most likely etiology is:
Answer: Pre-existing periapical pathology on an adjacent tooth
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.
Which of the following is the primary disadvantage of using zygomatic implants in severely atrophic maxillae?
Answer: High rate of sinus membrane perforation and sinusitis
Zygomatic implants traverse the maxillary sinus and are associated with a meaningful risk of chronic sinusitis due to sinus membrane disruption.
The biologic width around a dental implant (peri-implant supracrestal tissue attachment) differs from natural teeth primarily because:
Answer: The connective tissue fibers run parallel rather than perpendicular to the implant surface
Peri-implant connective tissue fibers run parallel to the implant surface (circumferential) because there is no cementum for perpendicular fiber insertion, unlike natural teeth.
When evaluating a cone beam CT prior to posterior mandibular implant placement, the minimum recommended safety margin from the inferior alveolar canal is:
Answer: 2.0 mm
A safety margin of at least 2 mm from the inferior alveolar canal is recommended to minimize the risk of neurosensory disturbance during implant placement.