Final answer:
The permanent dentition is usually completely erupted by the age of 9 to 11 years, excluding third molars.
Step-by-step explanation:
The permanent dentition usually erupts completely, exclusive of third molars, by the age of 9 to 11 years. The deciduous teeth start to emerge around six months of age and are gradually replaced by permanent teeth between the ages of 6 and 12. The sequence of eruption generally follows a pattern, with incisors and molars erupting first, followed by canines and premolars.