Intro to Endodontics

Question 1

periradicular

Answer 1

surrounding the root

Question 2

average number of roots and canals
- maxillary incisors and canines

Answer 2

1 root 1 canal

Question 3

average number of roots and canals
- maxillary 1st premolars

Answer 3

2 roots 2 canals

Question 4

average number of roots and canals
- maxillary 2nd premolars

Answer 4

1 root, 1 canal

Question 5

average number of roots and canals
- maxillary 1st molar

Answer 5

3 roots, 4 canals

Question 6

average number of roots and canals
- maxillary 2nd molar

Answer 6

3 roots, 3 canals

Question 7

average number of roots and canals
- mandibular incisors, canines and premolars

Answer 7

1 root, 1 canal

Question 8

average number of roots and canals
- mandibular first molar

Answer 8

2 roots, 3 canals

Question 9

average number of roots and canals
- mandibular 2nd molar

Answer 9

2 roots , 3 canals

Question 10

name 3 potential precursors to endodontic disease

Answer 10

trauma , gross caries, periapical pathology, pulpal pathology, cracks/fractures, root resorption

Question 11

structure of reactionary dentine

Answer 11

tubular and irregular

Question 12

structure of reparative dentine

Answer 12

atubular, dead tracts

Question 13

what does the vertucci classification concern

Answer 13

root canal configurations and morphology

Question 14

3 objectives of endodontic instrumentation

Answer 14

• create continuously tapering funnel shape
• keep apical foramen in OG position
• keep apical opening as small as possible

Question 15

how is estimated working length calculated

Answer 15

measured on radiograph

Question 16

how is corrected working length calculated

Answer 16

using electronic apex locator

Question 17

master apical file

Answer 17

largest diameter file used

Question 18

watch winding movement

Answer 18

back and forth 30-60 degrees movement with light apical pressure

Question 19

balanced force movement

Answer 19

back and forth unequal movement with continuous apical pressure

Question 20

H files function. , pros and cons

Answer 20

cuts on withdrawal
efficient but iatrogenic damage risk
good for removing gutta percha

Question 21

K files cutting edge location

Answer 21

perpendicular to long axis

Question 22

what needle should be used for endo irrigation

Answer 22

27 gauge endo needle

Question 23

where should obturation/ shaping end

Answer 23

1-2mm short of the apex