Crowding

Question 1

What is it caused by?

Answer 1

insufficient room for all teeth to erupt in line + occurs in jaws which are too small to accommodate 32 permanent teeth.

Question 2

As the permanent dentition erupts

Answer 2

the teeth become crooked + overlapping as those which are normally last to erupt cannot take their proper position in dental arch as there is insufficient room left

Question 3

Specific teeth

Answer 3

upper canines are usually displaced buccal, lower second premolars lingually + lower third molars are impacted within the bone of the mandible at the ramus

Question 4

Early XLA of carious deciduous molars

Answer 4

also contributes to crowding. the gap left by an XLA soon closes, as remaining posterior tooth drifts forwards + takes up some of the space required for the permanent successor