1 Perio II (Exam 2): Alveolar ridge preservation

buccal

after an extraction, which side of the bone surrounding the extraction do you expect to naturally resorb more:

- lingual

- buccal

- mesial

- distal

thinner

After an extraction, the buccal plate is ____ than the lingual

plate.

vertical

After an extraction, the "Horizontal resorption" thus can

manifest as _______ reduction of buccal wall.

lingual/palatal

Subsequent to the remodeling process is the relocation of the center of the alveolar ridge to a more _______ position that is unfavorable for implant placement.

1.24

The average vertical bone loss after an extraction heals is ____mm:

- 6.14

- 5.14

- 3.84

- 1.24

3.84

The average horizontal bone loss after an extraction heals is ____mm:

- 6.14

- 5.14

- 3.84

- 1.24

50%

6 months after an extraction, you can expect about ___ % loss of alveolar width

7mm

Approx. What ridge width needed for optimal implant placement?

- 5mm

- 7mm

- 9mm

- 11mm

Alveolar Ridge Preservation

A surgical procedure aimed at preventing ridge collapse and preserving ridge dimension after tooth extraction, typically done for purposes of implant site development. Involves the use of hard and/or soft tissue biomaterials and/or membranes.

To ensure good hemostasis

Which of the following is NOT an indication for ridge preservation?

- To enable installation and stability of a dental implant

- To reduce loss of alveolar bone volume

- To ensure good hemostasis

- To improve the esthetic outcome of the final prosthesis

- To regenerate bone faster allowing earlier implantation and restoration

- Pontic site development

- bone graft

- membrane

What are the 2 materials used in Alveolar ridge preservation surgery?

bone graft

defined as an implanted material that promotes bone healing alone or in combination with other materials:

Osteogenic

Osteoinduction

Osteoconduction

What are the 3 properties of bone grafting?

Osteoconduction

In the very least, a bone graft material should be/have ______

Osteoconduction

Occurs when bone graft material serves as a scaffold for new bone growth, which is perpetuated by the native bone. Osteoblasts from the margin of defect that is being grafted, utilize the bone graft material as a framework upon which to

spread and generate new bone

Osteoinduction

Involves stimulation of osteoprogenitor cells to differentiate into osteoblasts and then begins formation of new bone

Osteogenesis

occurs when vital osteoblasts originating from bone graft material contributes to the growth of new bone along with bone formation

Autograft

Which of the following graft materials is the only one that has osteogenic potential:

- Autograft

- Allograft

- Xenograft

- Alloplast

Autograft

Which of the following graft materials has a very high resorption rate:

- Autograft

- Allograft

- Xenograft

- Alloplast

Autograft

Which of the following graft materials has osteogenic, osteoconductive, and osteoinductive potential:

- Autograft

- Allograft

- Xenograft

- Alloplast

Allograft

Which of the following graft materials has osteoconductive, and osteoinductive potential:

- Autograft

- Allograft

- Xenograft

- Alloplast

- Xenograft

- Alloplast

Which of the following graft materials has only osteoconductive potential:

- Autograft

- Allograft

- Xenograft

- Alloplast

Autograft

ID the graft material:

• Extra-oral and intra-oral sources

• Iliac crest, nasal spine, ramus, tuberosity

• Osteogenic potential*

• Limited supply

• Additional Donor site

• Higher resorption rate

Allograft

ID the graft material:

• Donor Same Species

• Iliac cancellous bone and marrow, Freeze dried (FDBA) , Decalcified freeze dried (DFDBA) ( can be provided as cortico or cancellous)

• DFDBA may contain BMPs depending on bone bank - osteoinduction*

• Available in higher quantities

• Expensive

Xenograft

ID the graft material:

• Donor of another species

• Anorganic bone - removed all cells and protanecious material leaving behind an intert absorbable bone scaffolding upon which revascularization, osteoblast migration and woven bone formation supposedly occur

• Bovine or porcine

• Osteoconductive

• Longer resorption time

Alloplast

ID the graft material:

• Synthetic bone graft

• 6 types available: Non- porous hydroxyapatite, hydroxyapatite cement, porous hydroxyapatite, beta tri calcium phosphate PMMA and HEMA polymer, bioactive glass

• Inconsistent results - histologically encapsulated by CT with minimal or no bone formation

• Osteoconductive*

space maintenance

What is the main purpose of bone grafting?

• Biocompatible

• Ostegenic/ osteoconductive /

osteoinductive

• Resorbable

• Safe

• Easy to use

• Cost effective

What are the Ideal properties of bone graft:

membrane

Barrier membranes are used to promote cell exclusion during periodontal wound healing to promote regeneration of periodontal tissues

cell exclusion

What is the main purpose of using a membrane?

• Integration by host

• Clinical manageability

• Space making ability

• Mechanical strength

• Predictable resorption rate

What are the Ideal properties of a membrane:

Non-resorbable membranes

ID the type of membrane:

• Better space making ability

• Higher complication rate

• Requires surgical second procedure

• Good for larger bone formation/ vertical height

Resorbable membranes

ID the type of membrane:

• Lower complication rate

• Resorbs faster

• Better soft tissue response

- systemic

- local

- iatrogenic

What are the 3 categoties of risk factors in ridge preservation:

systemic

ID the type of risk factor category the following falls into: Diabetes, radiation, chemotherapy, antiresorptive meds, social

habits

- systemic

- local

- technical

local

ID the type of risk factor category the following falls into: Active infection, traumatic injuries, tooth fracture, decay

- systemic

- local

- technical

technical

ID the type of risk factor category the following falls into: Soft tissue quality, infection, iatrogenic complications, lack of graft stability, socket condition

- systemic

- local

- technical

3-6 months

How long after ARP can you place an implant?

- immediately

- 1-2 months

- 3-6 months

- 12 months