case pres 2

Question 1

how to remove 27d overhang

Answer 1

flame shaped diamond finishing bur

Question 2

guidelines for periodontal treatment

Answer 2

BSP S3
or
SDCEP periodontal guidelines

Question 3

most likely cause of buccal cervical toothwear

Answer 3

abrasion due to toothbrushing habits

Question 4

when should restoration after RCT be done

Answer 4

within 4 months of RCT treatment being completed a cuspal coverage restoration
(after 4 months RCT teeth 3x more likely to require extraction)

Question 5

purpose of a cuspal coverage restoration

Answer 5

prevent flexion and fracture of residual tooth structure

Question 6

how was perforation confirmed

Answer 6

microscope
electronic apex locator

Question 7

why was 13 extracted

Answer 7

perforation
couldn’t locate canal even with microscope
little to no ferrule to support subsequent restoration

Question 8

what material for subsequent definitive denture

Answer 8

acrylic
patient happy with immediate denture
good aesthetics, lightweight, easy to add to

Question 9

root canal treatment through crown vs with crown removed (cons)

Answer 9

through crown: visualisation difficult, harder orientation, increased perforation risk, cant guarantee elimination of pathological factors
crown removed - temporary restoration required, loss of coronal reference point

Question 10

how could perforation be repaired

Answer 10

MTA using an intra canal approach
surgical endodontics

Question 11

dental practicality index

Answer 11

Dawood and Patel 2017 - judges practicality of restorative treatment
based on 3 categories - endodontics, periodontal health and structural integrity
teeth graded
- 0 - no treatment needed
- 1 - simple treatment needed
- 2- complex treatment needed
- 6 - treatment impractical

Question 12

what can a crown margin misfit lead to

Answer 12

caries
plaque accumulation
microleakage
margin discolouration

Question 13

materials for anterior crown replacement

Answer 13

MCC - destructive, silver margins, affordable, strong and durable
emax - great aesthetics, good strength, can be bonded to tooth, expensive

Question 14

what cement for metal or ceramic crown

Answer 14

dual cure composite resin cement
with metal bonding agent or silane coupling agent

Question 15

how often should digital receptors be checked and what for

Answer 15

3 monthly
should be checked for
- visible damage
- image uniformity (unattenuated beam)
- image quality (test object)

Question 16

what should be shown on a periapical

Answer 16

crown
entire root
periapical bone

Question 17

IRMER17

Answer 17

ionising radiation medical exposure regulations 2017
details legal duties if exposing patients to ionising radiation
(in place to protect patients)

Question 18

IRR17

Answer 18

ionising radiation regulations 2017
details legal duties if using ionising radiation in the workplace
in place to protect staff and public

Question 19

how do azole antifungals work

Answer 19

inhibit ergosterol synthesis which is vital part of fungal cell membranes

Question 20

what is linea alba

Answer 20

thickening of mucosa due to frictional irritation from cheek biting/ chewing

Question 21

4 reasons for persistent debonding of crowns

Answer 21

• poor retention/ resistance form of crown preparation
• occlusal interference
• poor post design
• longitudanal root fracture
• secondary caries weakening cement

Question 22

retention vs resistance form

Answer 22

retention = resistance to displacement along path of intertion
resistance = resistance to displacement due to horizontal and oblique forces

Question 23

why is 2nd cement not as strong

Answer 23

• presence of contaminants
  -changes to tooth structure
• less mechanical retention