Timeline of Permanent Teeth - The first permanent tooth appears at around 5-6 years of age. - The mouth goes through a transition period with both primary and permanent teeth during the mixed dentition period. - The first permanent molars erupt behind the last milk molars of the primary dentition. - Up to 28 out of 32 permanent teeth appear by the age of thirteen. - The full permanent dentition is completed during the permanent dentition period.

Pathology of Permanent Teeth - Hyperdontia, or having extra teeth, is possible. - Hyperdontia is often associated with syndromes such as cleft lip and palate. - Supernumerary teeth may erupt into the mouth or remain impacted in the bone. - Hyperdontia is sometimes mistakenly referred to as a third set of teeth. - Syndromes like cleidocranial dysplasia and Gardner's syndrome can also be associated with hyperdontia.

Related Concepts - Medicine portal. - Deciduous dentition. - Tooth development. - Tooth eruption. - Teething. - Dentition.

References - American Dental Association provides information on tooth eruption and has a permanent tooth eruption chart. - Bath-Balogh and Fehrenbach's 'Illustrated Dental Embryology, Histology, and Anatomy' discusses tooth eruption. - Jordan, Regezi, and Sciubba's 'Oral pathology: clinical pathologic correlations' provides insights into tooth eruption. - Ash and Nelson's 'Wheeler's Dental Anatomy, Physiology, and Occlusion' is a recommended resource. - Grays Anatomy (20th edition, 1918) includes text in the public domain.

External Links - Wikimedia Commons has media related to Permanent teeth.