Extractions and Anchorage

Question 1

Serial extraction is done when there’s at least ____ mm of crowding.

Answer 1

10

Question 2

This clinical observation determines whether you should do serial extraction.

Answer 2

Crowding in the mandibular anterior teeth where the laterals are lingually locked or rotated.

Question 3

For serial extraction, which teeth are extracted first and why?

Answer 3

Primary canines to ease anterior crowding.

Question 4

In serial extraction, extract these teeth 6-12 months before their normal exfoliation.

Mainly benefits the mandibular arch.

Answer 4

Baby first molars

Question 5

Maxillary eruption sequence in adult teeth.

Answer 5

1st PM, 2nd PM, Canine

Question 6

Mandibular eruption sequence in adult teeth.

Answer 6

Canine, 1st PM, 2nd PM

Question 7

In serial extraction, what tooth is extracted after the baby canines and first molars?

Answer 7

1st premolars

Question 8

Serial extraction summart (Extract teeth in which order?):

Answer 8

1) Deciduous canines
2) Deciduous first molars
3) Deciduous first premolars

Question 9

Do you get ideal occlusion with serial extraction?

Answer 9

Heck no

Question 10

Benefits of Serial Extraction

Answer 10

• Naturally induced alignment of severely crowded anterior teeth.
• Improved periodontal health.
• Improved cosmetics/psychological state.
• Facilitates fixed appliance workload.
• Less possible orthogenic damage.

Question 11

This was developed as a simple method of dealing with severe crowding problems.

Answer 11

Serial Extraction

Question 12

An extraction procedure started in the early mixed dentition to avoid crowding in the permanent dentition.

Answer 12

Serial Extraction

Question 13

Contraindications to Serial Extraction

Answer 13

• Class II or III relationship.
• Skeletal discrepancy.
• Deep overbites - need maxillary Hawley + biteplate.
• Imbalanced perioral musculature (strain, hypo/hyper tonicity.
• Habits (thumb sucking, tongue thrusting, lip biting, mentalis habit).

Question 14

Tries to maintain the position of a tooth.

Answer 14

Anchorage

Question 15

Head gear and Face masks are what type of anchorage?

Answer 15

Extraoral

Question 16

Downward pull type of extraoral anchorage.

Answer 16

Cervical pull

Question 17

Upward pull type of extraoral anchorage.

Answer 17

Parietal pull

Question 18

Horizontal pull type of extraoral anchorage.

Answer 18

Occipital pull

Question 19

Types of intraoral anchorage.

Answer 19

• Braces

- Rubber bands

Question 20

Types of anchorage.

Answer 20

Simple
Stationary
Reciprocal

Question 21

Tipping of the anchor tooth is what kind of anchorage?

Answer 21

Simple

Question 22

Bodily movement of the anchor tooth is what type of anchorage?

Answer 22

Stationary

Question 23

Type of anchorage where both teeth that are anchored move in equal and opposite amounts.

Answer 23

Reciprocal

Question 24

The greater the root surface, the greater the what?

Answer 24

Resistance to stress

Question 25

Qualities of Anchorage teeth that affect how good of an anchor they will be.

Answer 25

1) Root form
2) Root Surface Area
3) Root number
4) Root Length

Question 26

The thickened ridge of bone that holds the teeth.

Answer 26

Alveolar process

Question 27

The dense/compact bone that covers the spongy bone.

Answer 27

Cortical bone plate

Question 28

Avascular bone

Answer 28

Cortical bone

Question 29

Vascular bone

Answer 29

Cancellous (Trabecular/Spongy) bone

Question 30

This type of bone has cellular changes when teeth move.

Answer 30

Cancellous

Question 31

These use cortical bone as anchorage.

Answer 31

TAD’s

Temporary Anchorage Devices