Furcations

Question 1

Through and Through furcation

Answer 1

Class III

Question 2

Complete loss of interradicular bone.

Answer 2

Class III furcation

Question 3

Loss of interradicular bone less than or equal to 1/3.

Answer 3

Class I furcation

Question 4

Loss of interradicular bone greater than 1/3.

Answer 4

Class II furcation.

Question 5

Complete loss of interradicular bone.

Answer 5

Class III furcation.

“Through and Through.”

Question 6

Do you go by radiographic or clinical furcations?

Answer 6

RADIOGRAPH bc they show the bone height.

Question 7

Type of furcation where you can clinically feel the roots diverge.

Answer 7

Class I

Question 8

See radiolucent black spots in the furcation area in this class of furcation.

Answer 8

III

Question 9

Area extending from the CEJ to furcation.

Answer 9

Root trunk

Question 10

How does the width of the root trunk affect progression and prognosis of furcation involvements?

Answer 10

The wider the root trunk, the better the prognosis because CT attaches to cementum (which is on the root trunk), and bone follows.

Question 11

Enamel projections may cause a patient to have furcation involvement.

Answer 11

True

Question 12

Better prognosis for fused or separated roots?

Answer 12

Separated!

Question 13

The longer the root trunk, the more of this.

Answer 13

CT attachment

Question 14

T/F:

Roots that are fused or close together are difficult to treat.

Answer 14

True

Question 15

Cervical enamel projections are a risk factor for developing _________ on molar teeth.

Answer 15

Furcations

Question 16

Acronym to treat furcations

Answer 16

Maintain furcation
Access
Remove
Close furcation

Question 17

Tx for a cervical enamel projection.

Answer 17

Odontoplasty.

Question 18

Ways to increase ACCESS to the furcation.

Answer 18

• Apically positioned flap.
• Odontoplasty.
• Osteoplasty/ectomy

Question 19

Ways to REMOVE the furcation.

Answer 19

• Root resection

- Hemisection

Question 20

How to CLOSE the furcation..

Answer 20

Flap curettage with barrier membrane (GTR).

Question 21

This must be done before you do root resection or hemisection.

Answer 21

RCT

Question 22

Root resection is common in which root of maxillary first molars?

Answer 22

DB root

Question 23

Procedure where you resect/cut off a root.

Answer 23

Root resection

Question 24

Procedure where you cut the tooth at the furcation to create two teeth.

Answer 24

Hemisection

Question 25

Procedure where you reflect a flap, place graft material, then coronally position the flap to cover the graft.

Answer 25

GTR

Question 26

Hemisecting a molar into two bicuspids.

Answer 26

Bicuspidization

Question 27

Procedure for Class III furcations where you drop the gingiva to below the level of the furcation, so the furcation is exposed and the patient can clean it with a proxy brush.

Answer 27

Tunneling

Question 28

Procedure for Class III furcations where you drop the gingiva to below the level of the furcation, so the furcation is exposed and the patient can clean it with a proxy brush.

Answer 28

Tunneling

The roots/furcation is like a tunnel.

Question 29

Root forms that contraindicate root resection.

Answer 29

• Extremely long root trunks with short roots.

- Fused roots.

Question 30

Indications for root resection

Answer 30

• Deep Class II furcations
• Class III furcations
• Advanced / root caries
• Gingival recession on a single root.
• Root proximity
• Endo failure or can’t perform endo.
• Tooth fracture.
• Root resorption/perforation.
• Severe vertical bone loss on a single root.

Question 31

Hemisection most often done on which teeth?

Answer 31

Mandibular molars.

Question 32

Hemisection AKA what?

Answer 32

Bicuspidization

Question 33

Root resection is most often done one which teeth?

Answer 33

Maxillary molars (esp DB cusp of max 1st molar).

Question 34

T/F:

Insufficient bone on the remaining roots is a contraindication for root resection.

Answer 34

True

Question 35

This must occur after resecting the root.

Answer 35

Odontoplasty

Question 36

Teeth with resected roots should contact the opposing teeth in what position only?

Answer 36

Centric occlusion.

Not during lateral movements!