8. Ridge Augmentation

Question 1

Alveolar ridge preservation is designed to minimize… and maximize…

Answer 1

Min: external resorption of the ridge

Max: bone formation within the socket

Question 2

In the horizontal plane, bone loss occurs largely at the expense of what bone?

Answer 2

Buccal or Facial Bone

Question 3

Where is the loss of vertical ridge height most pronounced?

Answer 3

Buccal aspect

Question 4

In the first 6 months what % of alveolar height and width is lost?

Answer 4

40% height

60% width

Question 5

What is a Seibert Class I Ridge Defect?

Answer 5

• BL loss of tissue
• Normal ridge height in the APC dimension

Question 6

What is a Seibert Class II Ridge Defect?

Answer 6

• APC loss of tissue
• Normal ridge width in a BL dimension

Question 7

What is a Seibert Class III Ridge Defect?

Answer 7

• Combo BL and APC loss of tissue
• Resulting in loss of normal height and width

Question 8

What uses the long-standing biological phenomenon that new bone fills in the gap defect created when 2 pieces of bone are separated slowly under tension?

Answer 8

Distraction Osteogenesis

Question 9

What are the prerequisites for optimal bone augmentation of defects using distraction osteogenesis?

Answer 9

• Min of 6-7mm of bone height above vital structures
• Vertical ridge defect of 3-4mm, and an edentulous ridge span of _>_3 missing teeth

Question 10

What lines the maxillary sinus?

Answer 10

• Pseudostratified ciliated columnar or cuboidal epithelium
• aka Schneiderian Membrane

Question 11

What are the indications for sinus augmentation?

Answer 11

• Inadequate vertical bone height (<5mm) for implant placement owing to:
  
  • Pneumatization of the sinus
  • Resorption of the alveolar ridge
  • A combo of both

Question 12

What are the potential complications of sinus augmentation?

Answer 12

• Intraoperative bleeding
• Schneiderian membrane tear
• Acute maxillary sinusitis (infection)
• Wound dehiscence - incision breakdown