endodontics

Question 1

3 reasons for obturating

Answer 1

apical seal
prevent ingress of bacteria and fluids from periodontal space to root canal
removes any fermentable substrate for bacteria still present - unable to grow and thrive

Question 2

herb schilder’s endo principles

Answer 2

create a continuously tapering funnel shape
maintain apical foramen in original position
keep apical opening as small as possible

Question 3

use of irrigant other than disinfection

Answer 3

removal of pulpal reminants and collagen - organic material

removal of smear layer

Question 4

best irrigant used

Answer 4

sodium hypochlorite 3%

Question 5

why is non setting CaOH ideal inter appointment medicament

Answer 5

easily removed

high pH 12.5 - antimicrobial properties

Question 6

reasons for sealer

Answer 6

fills in smaller holes such as dentinal tubules and lateral canals
fills in voids between master cone and accessory cone
lubricates cones during obturation

Question 7

components of GP other than rubber

Answer 7

65% zinc oxide, 10% radiopacifiers, 5% plasticisers