Implants/Bone Grafting Flashcards
Most common complications when implants are placed in the esthetic zone
Recession of facial gingival margin and loss of papilla height
How much space should be present buccal to an immediate implant placed in a maxillary anterior socket
2 mm between buccal plate and implant shoulder
What is the 5-year combined success rate of maxillary and mandibular dental implants?
94.6%
Difference in survival of implants in grafted versus native bone?
There is no significant difference in implant survival when bone grafting is performed as compared to implants in native bone.
Graft material facilitates invasion of blood vessels and connection of bone cells to the lattice framework. Forms a scaffold.
Osteoconduction
Active recruitment of host mesenchymal stem cells, including growth factors and bone morphogenetic proteins, from the surrounding tissue allows formation of new bone.
Osteoinduction
The survival of cellular elements within a donor graft allows synthesis of new bone at the recipient site.
Osteogenesis
Three major phases of graft healing (also bone repair)
Inflammation, proliferation, remodeling
The gradual osteoclastic resorption of immature woven bone with osteoblastic bone formation and maturation to lamellar bone is known as?
Creeping substitution
Define the concept of guided bone regeneration.
Using a resorbable or nonresorbable barrier membrane to stabilize the blood clot and create a space into which bone cells can grow without interference of the more quickly proliferating soft tissue cells.
The only type of bone graft containing osteocompetent cells that can undergo osteogenesis
Autogenous Grafts
Name three types of available allografts:
Fresh-frozen bone allograft (FFBA), freeze-dried bone allograft (FDBA), and demineralized freeze-dried bone allograft (DFDBA).
Difference in healing process between grafting with cortical versus cancellous FDBA?
Cancellous bone heals by creeping substitution (formation of new bone by osteoblasts followed by resorptive process by osteoclasts)
Cortical bone heals by reverse creeping substitution (initial osteoclastic activity must precede osteoblastic activity and new bone formation)
Advantages of cortical allograft?
Greater density prevents collapse of grafted area, slower to resorb
Advantages of cancellous allograft?
Lower density leads to greater surface area for quicker revascularization and cell seeding leads to more rapid healing.
