Bone Grafting & Ridge Augmentation Flashcards
7 cards from real Dental Implants practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bone Grafting & Ridge Augmentation flashcards as text
What is the 'tent pole' effect in Guided Bone Regeneration (GBR)?
Answer: Creating and maintaining space under a membrane using rigid supports such as pins or titanium mesh
The tent pole effect refers to the technique of using titanium screws, pins, or mesh to mechanically support and maintain the volume of space beneath a GBR membrane, preventing membrane collapse into the defect and ensuring adequate room for bone regeneration.
How is distraction osteogenesis applied in ridge augmentation for dental implants?
Answer: Surgically dividing bone and gradually separating the segments to stimulate new bone formation in the gap
Distraction osteogenesis involves a corticotomy to divide bone, followed by a latency period and then gradual mechanical separation (distraction) of the segments, stimulating new bone (callus) formation in the expanding gap for vertical or horizontal ridge augmentation.
What is the standard activation rate used for bone distractors in vertical ridge augmentation procedures?
Answer: 1 mm per day
The standard distraction rate is approximately 1 mm per day (typically in two 0.5 mm activations per day), which matches the rate of natural bone callus formation; faster rates result in fibrous tissue rather than bone, while slower rates cause premature consolidation.
What term describes bone graft material that is derived from human cadaveric donors and processed for clinical use?
Answer: Allograft
Allograft refers to bone graft material obtained from human donors, which undergoes processing (freeze-drying, demineralization, sterilization) to eliminate immunogenicity while preserving its scaffolding and osteoinductive properties.
Which type of bone defect is most favorable for successful bone regeneration using GBR techniques?
Answer: Contained intrabony defects with multiple remaining bony walls
Contained intrabony defects with multiple remaining bony walls (three-wall or four-wall defects) are most favorable because the surrounding bone provides blood supply, osteogenic cells, and natural containment for regenerating bone, reducing the need for space maintenance.
What does DFDBA stand for, and what is its primary property that distinguishes it from mineralized bone allograft?
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.
In the context of simultaneous implant placement with bone grafting, what does 'primary stability' refer to?
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.