Paeds

Question 1

What’s is the normal depth from CEJ to alveolar bone crest

Answer 1

2mm

Question 2

List 4 things that determine the prognosis of a traumatised tooth

Answer 2

Type of fracture - complicated or not
Maturity of the tooth - open or closed apex
Vitality of the pulp
Mobility

Question 3

Following a traumatic injury to a tooth - what do you want ot make sure you discus with the parents

Answer 3

Any possible complications
The prognosis of the tooth
Treatment options

Question 4

If you are unable to locate the tooth fragment where could it be and what is your managment

Answer 4

Paitent could have swallowed it - send to A and E
Patient could have inhaled it - send to A and E for chest xray
Could be embedded in patients lip - remove and suture

Question 5

If you suspect a patient has MIH - what are 5 questions you could ask to rule out fluorosis

Answer 5

Has there ever beeen an excessive use of toothpaste
Do they live in an area where there is fluoridated water
Do they use fluoride supplements
Does a sibling use high strength toothpaste they may have used
What is there oral hygiene routine

Question 6

What are some potential problems with molars affected by MIH

Answer 6

Caries suceptibilty
Difficultly to restore
Long term prognosis is poor
Potential requirement for complex treatment
Sensitivity

Question 7

List 5 possible treatment options for impacted molars

Answer 7

Leave and monitor
Surgically extract
Extraction of the E
Distal discing of the E
Ortho applicance to bring into postion
Ortho sepatotr

Question 8

What features of the permanent dentition allow for the replacement of the primary teeth without crowding

Answer 8

Primate space - presence of space between the primary teeth
Growth of the maxilla
Proclination of the permanent teeth
Leeway space

Question 9

What is leeway space and how does this prevent crowding

Answer 9

Leeway space is the extra mesio-distal space occupied by the primary molars which are wider than the premolars that replace them

Question 10

What are the clinical findings of an extrusion injury

Answer 10

Tooth suffers axial displacement partially out of the socket
The tooth appears elongated and excessively mobile

Question 11

Why should we use a lighter force in orthodotnics for a paitent with previous perio?

Answer 11

Because there fulcrum is closer to the cortex causing more tipping of the teeth

Question 12

What are the main fibres which tend to cause relapse following orthodontic treatment and why

Answer 12

Supra-crestal this is because these are the last fibres to remodel

Question 13

What is the statistic for Relaspe 10 years after removal of orhto

Answer 13

70%

Question 14

Name 5 situations that are more likely to result in Relaspe

Answer 14

Diastema’s
Rotations
Any tooth that has been moved a long distance
Any tooth you haven’t brought the root with
Expanding arches

Question 15

What advice do you give a paitent when they first have their ortho removed and they are given a retainer

Answer 15

Wear retainer full time for 2 weeks and following that only at night

Question 16

Name 4 risks of orthodontic treatment that increase the risk of relpase

Answer 16

Level of force used
Duration of treatment
Distance teeth habe been moved
Heavy forces relating to intrusion

Question 17

Can we prevent Relaspe by achieving good occlusion

Answer 17

Correct to good buccal interdigitation and good inter-incisal angle will make Relaspe less likely

Question 18

What are two advantages of a hawley retainer over a vaccum retainer

Answer 18

Better in patients with hyperplastic gingivae
The occlusal surfaces of the teeth arent covered and this allows the occlusion to settle