past paper areas

Question 1

virulence factors of p.gingivalis

Answer 1

atypical endotoxins
gingipains
fimbrillar adhesions

Question 2

4 indications for inhalation sedation

Answer 2

anxiety
uncomfortable procedures
MH aggravated by stress
too young for IV sedation

Question 3

implication of complete upper denture with natural lower teeth

Answer 3

presence of natural teeth means that high forces can be applied to edentulous maxillary ridge - can lead to denture instability as peripheral seal broken
excessive forces can also result in alveolar resorption and fibrous tissue replacement (flabby ridge)

Question 4

name 2 techniques for impression of a flabby ridge

Answer 4

1. 2 stage mucostatic impression (use light body silicone to take impression, then alginate impression over the top)
2. window technique - special tray with window cut out over flabby ridge, alginate impression, remove excess then light body silicone over flabby ridge)

Question 5

indirect retention

Answer 5

resistance to rotational displacement
indirect retainer should be placed at 90 degrees to fulcrum of line from two most posterior clasps

Question 6

discuss an RPI

Answer 6

stress relieving clasp system
mesial rest, proximal guide plate, i bar clasp

I bar clasp and proximal guide plate disingage during function, mesial rest prevents potentially harmful torque and denture lifting

Question 7

what are the 3 keystone pathogens of periodontitis

Answer 7

prevotella intermedia
porphyromonas gingivalis
tanerella forsythia

Question 8

7 types of lichen planus

Answer 8

reticular
papular
plaque like
atrophic
erosive
bullous
desquamative gingivitis

Question 9

4 histological features of lichen planus

Answer 9

elongated rete ridges
basal cell damage
dense sub epithelial band of lymphocytes
civatte bodies
patchy acanthosis

Question 10

what molecules? does immunofluorescence detect in pemphigoid and pemphhigus

Answer 10

IgG and C3

Question 11

2 tests for pemphigus diagnosis

Answer 11

direct immunofluorescence
biopsy for histopathological analysis

Question 12

dentinogenesis imperfecta mutation

Answer 12

type one collagen

Question 13

clinical and radiographical signs of dentinogenesis imperfecta

Answer 13

clinical - bulbous crowns, both dentitions affected (primary worse)
radiographically - pulpal obliteration, thin roots

Question 14

name 3 methods for removing posts

Answer 14

ultrasonic
masserann kit
sliding hammer
forceps