Alveolar bone preservation following tooth extraction Flashcards
following an extraction, a blood clot forms within …. and fibrinolysis occurs within … then replacement of coagulum by granulation tissue happens within ….
24 hours
1-3 days
2-4 days
following an extraction, a vascular network is formed by the end of …
1 week
following an extraction, socket is covered with new connective tissue rich in vessels and inflammatory cells by …
week 2
following an extraction, soft tissue becomes keratinized by …
week 4-6
following an extraction, at the hard tissue level, the alveolus is filled with woven bone by …
mineral tissue is reinforced with layers of lamellar bone that is deposited on woven bone by …
bone deposition will continue for …. but will not reach coronal bone level of neighboring teeth
4-6 weeks
4-6 months
several months
resorption patterns:
there is significantly larger resorption in the … aspect of the alveolus in both the maxilla and the mandible
there is usually formation of a … concavity following healing
buccal
buccal
3 factors that may affect the amount of residual bone following tooth extraction
age of the patient
elevation of flap
surgical trauma from extraction
a class 1 bone defect is called …
extraction socket (has 4 walls plus the 5th apical “floor”)
a class 2 and 3 bone defect is called a …. defect and it is when one wall has this defect
dehiscence
a class 4 bone defect is called a …. defect and is when a … or … wall is lost
horizontal
buccal or lingual
a class 5 bone defect is called a … defect and it is when … is the issue
vertical
height
…. is a guided bone regeneration application at the time of tooth extraction to CONTROL bone resorption
Alveolar Ridge Preservation (ARP)
… is a guided regeneration targeting specifically the regeneration of already resorbed or lost bone
Guided Bone Regeneration (GBR)
indications for alveolar ridge preservation
when immediate placement isn’t possible
surgical considerations: wound stability
space maintenance
preop/postop conditions
contraindications of alveolar ridge preservation
infection
indication for immediate placement (fistula)
soft tissue limitations
healing time for bovine bone with collagen membrane
7 months
… bone grafting materials act as a scaffold
osteoconductive
…. bone grafting materials stimulate the resident cells
osteoinductive
which graft material is the only one that is osteogenic, osteoinductive and osteoconductive
autogenous
allografts are from … … and they are … and …
another individual
osteoinductive and osteoconductive
xenografts are from …. and they are mainly …
another species (usually bovine)
osteoconductive
4 grafting materials
autogenous
allograft
xenograft
synthetic
3 absorbable synthetic grafting materials
plaster of paris
calcium carbonate
absorbable ceramics (tricalcium phosphate and HA which are carriers)
what are the non-absorbable grafting materials?
dense HA, porous HA, bioglass and a calcium coated polymer consisting of polymethacrylate and hydroxymethylmethacrylate (PMMA polymer)
4 barrier types
expanded polytetrafluorethylene (ePTFE)
titanium reinforced e PTFE
cross-linked bovine collagen barrier (most used)
bioabsorbable polymer formulations: polylactic acid based membranes
4 factors affecting the outcome of the ARP
blood supply
space maintenance
membrane stability
tension-free flap closure
