L48 Alveolar bone pres. after extract

Question 1

Wound healing after extraction

Soft tissue level

Answer 1

24Hrs: blood clot, inflammatory cells, growth factors
1-3 days: fibronolysis, mesenchymal cells
2-4 days: Granulation tissue replaces clot
1 week: vascular network formed
2 week: New CT
4-6 week: Keratinization

Question 2

Wound healing after extraction

Hard tissue level

Answer 2

4-6 weeks: alveolus filled with woven bone
4-6 months: Layers of lamellar bone on woven
Several months: continued deposition

Question 3

Bone defect classifications

Answer 3

Class I: extractions
Class II, III: Dehiscience
Class IV: Horizontal
Class V: vertical

Question 4

Contraindications of Alveolar bone preservation

Answer 4

Infection
Immediate implant placement
Soft tissue limitation

Question 5

Osteoconductive vs

Osteroinductive

Answer 5

Conductive: scaffold
Inductive: stimulates residence cells

Question 6

Expected outcomes
Autograft
Allograft
Xenograft

Answer 6

Auto: Genic, inductive, conductive
Allo: Inductive, conductive
Xeno: Conductive

Question 7

Absorbable synthetic graft example

Answer 7

Tricalcium Phosphate

Question 8

Non-absorbable synthetic graft example

Answer 8

bioglass

Question 9

Factors affecting outcome of alveolar ridge preservation

Answer 9

Blood supply
Space maintenance
Membrane stability
Tension free flap closure