Cleft Lip and Palate

Question 1

what classification system is used for defining cleft lip and palates

Answer 1

LAHSHAL classification

Question 2

what brachial arch forms the maxilla and mandible

Answer 2

1st brachial arch

Question 3

name 3 potential genetic aetiologies of a CLP

Answer 3

family history
syndromes
ethnicity

Question 4

name 3 potential environmental aetiologies of a CLP

Answer 4

social deprivation
smoking
alcohol
anti - epileptics
multivitamins
(by mother during pregnancy)

Question 5

after birth, what are the 3 major issues CLP babies face

Answer 5

cant suckle/ feed, aesthetics, speech

Question 6

name 3 members of the MDT team involved in CLP care

Answer 6

ENT
psychology
orthodontist
surgeon
speech and language

Question 7

at what age is lip surgery done

Answer 7

3-6 months
done for aesthetics rather than function - repair of obicularis oris

Question 8

what age is palate surgery done

Answer 8

9-12 months
palate done later than lip or else airway blocked
should be done before 12 months as this is when speech begins

Question 9

name 5 potential dental implications of a CLP

Answer 9

missing teeth - not just in cleft site
impacted teeth
crowding (constricted upper arch)
class III malocclusion (20% CLP cases)
caries - increased crowding, strange positioning, lower social demographic groups

Question 10

what age is bone grafting done in CLP patients and why

Answer 10

8-10 years
ensures sufficient alveolar bone for permanent teeth to develop into

Question 11

name 2 syndromes that increase risk of CLP

Answer 11

pierre robin
treacher collins

Question 12

what does a * and a . mean in the LAHSHAL classification

Answer 12

• • minimal cleft
    .- normal

e.g L.,AL

Question 13

anatomical cause of a cleft lip

Answer 13

failure of fusion of frontonasal and maxillary processes

Question 14

anatomical cause of a cleft palate

Answer 14

failure of fusion of the palatal shelves of the maxillary process - can involve the hard and/or soft palate