permanent teeth

[mohamed refaay]

Adult teeth or permanent teeth replace the primary teeth. They aid in digestion, speech and general appearance. There are 32 permanent teeth, with the main difference from primary teeth is that there are 4 premolars and 6 molars in each arch. Permanent teeth begin erupting at 6yrs of age and end at 21yrs of age. Some people may not have some if not all their 3rd molars due to evolutionary changes leading to the lack of development of these teeth. 3rd molars may not erupt due to becoming embedded in jaw. The tooth consists of a crown and root, and the tooth is composed of different materials that aid in strengthening, preserving and maintaining its function.
Adult teeth begin to replace the front milk teeth from the age of about six. For the next six to eight years there is a gradual replacement of milk teeth by adult teeth. This stage is called mixed dentition, as both milk and adult teeth will be from the mouth at the same time. By the age of about 12-14 all adult teeth should have appeared using the exception of wisdom teeth (third molars). At this stage the mouth will contain twenty-eight teeth. These teeth have to last for life as we only get one set...... more

[Vega]

Are permanent teeth any different from baby teeth or is it just size? I know you said that some people don't have their third molars but I actually didn't have a permanent tooth in my first premolar. The dentist ended up putting a bridge there with a false tooth.

[euphoriafan]

(02-26-2010 02:24 AM)Vega Wrote:  Are permanent teeth any different from baby teeth or is it just size? I know you said that some people don't have their third molars but I actually didn't have a permanent tooth in my first premolar. The dentist ended up putting a bridge there with a false tooth.

the baby teeth have smaller size, a 'whiter' color, and the incisal edge of the baby incisor ( 4 front teeth of each arch) has the 3 visible mamelons. besides, on the xray film, u see the roots of baby teeth are widely opening, because it contains the germ of permanent teeth beneath.

lacking some teeth can happen to one person or another. its called hypodontia. the tooth which is usually missing is third molar, then it's lateral incisor, second molar. then like in ur case, the first molar.
hypodontia is fixed with bridge or implant.

[ppyo]

Thanks for the good info there! Really useful.