Exam II material Dr. Pruzansky Extractions

Question 1

What are the 5 indications for extractions?

Answer 1

1.Crowding 2.uprighting proclined incisors 3.Sagittal A-P correction 4.Skeletal open bite 5.profile/soft tissue improvement

Question 2

What are the three methods to resolve crowding?

Answer 2

1.expand/procline the dentition 2.reduction of tooth width 3.extraction

Question 3

Interproximal reduction guidelines: ___mm per side per tooth = ___mm maximum from 1st molar to 1st molar

Answer 3

0.5mm…5.5mm

Question 4

Interproximal reduction guidelines AGAIN: ONLY ___mm of enamel can be removed from each contact

Answer 4

0.5mm

Question 5

What are the IDEAL teeth for IPR?

Answer 5

triangular mandibular incisors with small contacts

Question 6

When doing ext for ortho: Extract closest to the “_____” area

Answer 6

“problem”

Question 7

When doing ext for ortho: Extract tooth with ________

Answer 7

least favorable prognosis

Question 8

EXTRACTION PATTERNS: for Crowding, retraction of incisors, some anterior/posterior correction

Answer 8

upper and lower 1st PMs

Question 9

EXTRACTION PATTERNS: Typically in adult cases with full step Class II molar…what will this ext pattern usually finish with?

Answer 9

upper 1st PMs…Will finish with Class I canines and Class II molar

Question 10

EXTRACTION PATTERNS: Class II correction

Answer 10

upper 1st PMs and lower 2nd PMs (opposite of class III ext’s)

Question 11

EXTRACTION PATTERNS: for class III correction

Answer 11

upper 2nd PMs and lower 1st PMs (opposite to class II ext’s)

Question 12

EXTRACTION PATTERNS: For patients with a slight Class III tendency, small maxillary incisors and lower incisor crowding

Answer 12

lower central incisor

Question 13

EXTRACTION PATTERNS: Ext of the lower central incisor will typically leave ______ and the mandibular “midline” will be the single central incisor

Answer 13

overjet

Question 14

EXTRACTION PATTERNS: Which ext is indicated when the first molar is severely compromised and the third molar is forming

Answer 14

first molar ext

Question 15

EXTRACTION PATTERNS: Which tooth is ext when the first molar will be distalized?

Answer 15

2nd molar ext

Question 16

EXTRACTION PATTERNS: Asymmetric extraction patterns are used for ______ asymmetries

Answer 16

midline

Question 17

Indications for SERIAL extractions: ___mm or more of crowding in the anterior areas per arch

Answer 17

7mm

Question 18

SERIAL extractions protocol: Initiated when permanent lateral incisors erupt rotated or are blocked from eruption…extract: Extract which teeth?

Answer 18

primary canines

Question 19

SERIAL extractions protocol: after ext of the primary canines- wait __-__ months, extract __________
(when 1/2 to 2/3s of root formation is seen on permanent 1st premolar)

Answer 19

6-12…primary 1st molars

Question 20

SERIAL extractions protocol: after the primary 1st molars have been extracted, then extract

Answer 20

Extract permanent 1st premolars

Question 21

SERIAL extractions protocol: mnemonic for this protocol

Answer 21

CD4 (primary canines, primary 1st molars, permanent 1st PMs)

Question 22

Extraction of a primary tooth will only ______ the eruption of the succedaneous tooth if at least HOW MUCH of the root is formed?

Answer 22

SPEED UP…1/2 of the root

Question 23

If a primary tooth is extracted _______, it will actually slow down eruption!!

Answer 23

too early