Osseous Defects

Question 1

A bony deformity that is not uniform often involving horizontal and vertical bone loss is called what?

Answer 1

An osseous defect

*Involving 1 or more teeth. not necessarily a sign of disease

Question 2

Transgingival proving (bone sounding) gives you topographic information about a bony defect in what two directions?

Answer 2

-Vertical and horizontal

Question 3

What are the three intrabony defects?

Answer 3

1-Three-wall (retains things well, best outcome)
2-Two-wall
3-One-wall (hard to retain anything, poor outcome)

Question 4

A three-wall infrabony defect that wraps around the two involving two or more contiguous root surfaces is called what?

Answer 4

Circumferential defect

Question 5

What are 4 additional designations for Three-wall infra bony defects?

Answer 5

1-Narrow (holds clot better but is harder to clean)
2-Wide-mouth (Better access but unstable clot)
3-Shallow (poor clot retention)
4-Deep (Better retention, typically better outcomes)

Question 6

Interdental craters and two-wall semi-septum are both types of what infrabony defect?

Answer 6

Two-wall

*most common type are interdental craters

Question 7

Which type of infra bony defect is most difficult?

Answer 7

One-wall infra bony defects

*Usually ends up being just an extraction since predictability is poor and cost is high

Question 8

What are the two types of osseous surgeries?

Answer 8

1-Subtractive osseous surgery (resective)

2-Additive osseous surgery (regenerative)

Question 9

The reshaping of bone without removing tooth supporting bone is called what?

Answer 9

Osteoplasty

Question 10

The Removal of tooth supporting bone is called what?

Answer 10

Ostectomy

Question 11

What two types of architecture should be considered when reshaping the marginal bone to resemble normal alveolar bone?

Answer 11

• Positive architecture

- Negative architecture

Question 12

What can make primary wound closure easier in osseous procedures?

Answer 12

Thinning the bone to allow flap approximation

Question 13

What 3 things determine the degree of scalloping around teeth?

Answer 13

1-Cemento-enamel junction
2-Convexity of the teeth
3-Tooth position in alveolar bone

Question 14

What are 6 reasons to not do osseous resection?

Answer 14

1-Esthetics areas
2-Isolated deep pockets
3-Advanced periodontitis
4-Anatomic factors (flat palate, proximity to sinus, ramus or oblique ridge)
5-High caries risk
6-Serious systemic conditions

Question 15

Which procedure reduces thickness of the alveolar housing and provides relative prominence to the radicular aspect of the tooth?

Answer 15

Vertical grooving

Question 16

Which procedure attempts to graduals the bone over the entire radicular surface and a smooth surface for good flap adaption?

Answer 16

Radicular blending

Question 17

What does gradualizing marginal bone do?

Answer 17

Provides a sound, regular base for gingival tissue to follow

Question 18

What feature, if left behind, allows tissue to rise to a higher level than the base of the bone loss in interdental areas?

Answer 18

“Widows Peaks” or discrepancies on the gingival line angle