By age of 12 all the milk teeth will be replaced with permanent teeth. But in few people, they may not lose milk teeth. These are called retained deciduous (milk) teeth. This does not pose only problem. If this tooth is causing misalignment of teeth, then it may be removed and orthodontic correction may be needed to straighten or align the teeth in desired position.
Answered2016-09-10 06:17:43
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