Managing the developing dentition Flashcards
What is a midline diastema?
a space between the incisors most commonly on the upper arch
What is the prevelance of midline diastemas?
98% of 6 year olds
49% 11 year olds
7% of 12 +
What are the causes of a midline diastema?
Physiological Spaced dentition Missing teeth midline supernumeray Proclined upper labial segment Prominent frenum
At which point in dental development is it unlikely to see spontaneous closure of the midline diastema?
once the canines erupt
How does the fraenal position change with age?
in the young, high fraenal attatchment, this migrates down as the teeth erupt
When would you intervene when a midline diastema is present?
when it is more than 3mm
What is a potential problem that may arise by fixing the midline diastema?
if the roots impede on the crowns of unerupted teeth then this may lead to root resorption
What is a dilaceration?
this is a distortion or a bend in the root of the tooth
Which teeth are most commonly affected by dilacerations?
upper centrals and laterals
What is the aetiology of a dilaceration?
Developmental: usually seen as an isolated central incisor with the crown turned upwards, no changes to enamel or dentine
trauma: Causes the crown typically to be deflected palatally with disturbances in enamel or dentine development
Which gender is developmental dilaceration seen more commonly in?
F
What are the two groups of delayed eruption?
Generalised (Whole dentition affected)
Localised
What are the causes of generalised delayed eruption?
Downs
Cleidocranial
Hereditary gingival fibro
What are the causes of localised delayed eruption?
crowding congenitally absent dilaceration supernumeray abnormal position of crypt
What is the effect of premature exfoliation of the decidious incisors?
this has little effect on the developing dentition
this is because it is shed quite early in the devloping dentition
