Comparison of Permanent and Deciduous Teeth Flashcards
what is the difference between permanent incisors and deciduous incisors
primary are smaller in crown and root proportions
what is the difference between the primary molars and the permanent premolars
primary molars are wider mesiodistally
what is the difference between primary molars and permanent molars
primary molars are more bulbous
what is the colour difference between primary and permanent
primary teeth are whiter
what do primary roots look like compared to permanent roots
primary roots are narrower
what do the roots of primary molars look like compared to permanent molars?
primary molar roots are longer and more slender and flare apically to allow room for developing permanent crowns
what is the difference between the pulps in primary and permanent teeth
primary teeth have big pulp chambers and the pulp horns extend higher occlusally (more chance of pulpal exposure)
what do the root canals on primary teeth look like?
they are ribbon shaped and have multiple interconnecting and accessory canals (impossible to clean)
how does the thickness of the dentine in primary teeth compare to permanent ones
primary dentine is much thinner
how does the thickness of the enamel in primary teeth compare to permanent teeth
the enamel is thin and has a consistent depth
what is leeway space
extra mesio-distal space occupied by the primary molars which are wider than the premolars which will replace them
how long is the leeway space
upper arch = 1.5mm per side
lower arch = 2.5mm per side
why is anterior spacing desired in the primary dentition
less chance of overcrowding in the permanent dentition
what is the difference between the positions of the incisors
deciduous incisors are upright and permanent incisors are proclined
