ORE Part 2 Paediatric Dentistry 3

Question 1

A child has an avulsed permanent upper central incisor (open apex). What is the maximum out-of-socket time for a favourable reimplantation prognosis?

Accepted Answer

Less than 60 minutes, ideally under 15–20 minutes

Answer

For optimal PDL cell viability, reimplantation should occur within 20–30 minutes (dry storage). After 60 minutes dry storage, PDL cells are non-viable, though reimplantation may still be attempted for bone preservation.

Question 2

What is the recommended management of a subluxed primary upper incisor with displacement towards the permanent tooth germ?

Accepted Answer

Extraction of the primary tooth to protect the permanent successor

Answer

Intruded or severely displaced primary teeth can damage the developing permanent tooth germ; extraction is recommended when displacement threatens the permanent successor's development.

Question 3

Which interceptive orthodontic appliance is used to maintain space following premature loss of a primary first molar?

Accepted Answer

Band and loop space maintainer

Answer

A band and loop space maintainer (fixed) is used after premature primary molar loss to prevent mesial drift of the first permanent molar and preserve space for the permanent premolar.

Question 4

What is the recommended DMFT index for assessing dental caries experience in a child?

Accepted Answer

DMFT counts decayed, missing (due to caries), and filled teeth in the permanent dentition

Answer

DMFT (Decayed, Missing, Filled Teeth) records the total caries experience in permanent teeth; dmft (lowercase) is used for primary teeth to distinguish between the two dentitions.

Question 5

What is the most common dental anomaly associated with Down's syndrome?

Accepted Answer

Hypodontia (congenitally missing teeth), delayed eruption, and microdontia

Answer

Down's syndrome is associated with hypodontia, delayed and irregular eruption, microdontia, and high caries risk, requiring careful monitoring and preventive dental care.

ORE Part 2 Practice Test

ORE Part 2 Practice Test

ORE Part 2 Paediatric Dentistry 3