Question 1

Why do we get wisdom teeth if they don't fit?

Accepted Answer

We still grow wisdom teeth because tooth size is under slow genetic control, but the human jaw shrank quickly once cooking and soft diets reduced the need for heavy chewing. The teeth stayed roughly ancestral in size while the jaw that once held them contracted, leaving no room.

Question 2

Do wisdom teeth always need to be removed?

Accepted Answer

No. A wisdom tooth that erupts fully, sits in proper alignment, and can be kept clean is a working tooth that can stay. Removal is recommended mainly for impaction, recurrent infection, pain, cysts, or damage to neighboring teeth, and the decision belongs to a dentist.

Question 3

Why are some people born without wisdom teeth?

Accepted Answer

Some people never develop third molars because of variations in genes like PAX9 that control tooth formation and can effectively cancel a tooth before it forms. The trait is unevenly distributed across populations and may represent evolution gradually editing out a structure we no longer need.

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The Tooth Your Body Builds But Cannot Use