How long does it take for a new tooth to grow after a tooth falls out?

Generally, how long it takes for a new tooth to grow after a tooth falls out depends on the specific circumstances. If a baby tooth falls out, a new tooth usually emerges within about three months. However, if a permanent tooth is lost, a new tooth will generally never grow back. The details are as follows:

Humans have two sets of teeth in their lifetime: primary (baby) teeth and permanent teeth. Primary teeth typically begin to erupt around six months of age and are fully erupted by approximately 2.5 years, totaling 20 teeth. Around age six, primary teeth start to fall out—a period known as the mixed dentition stage. The natural shedding of baby teeth is partly influenced by the eruption of permanent teeth beneath the jawbone. Generally, a new permanent tooth emerges about three months after a baby tooth falls out.

By around 12 to 13 years of age, all primary teeth are usually completely replaced, marking the beginning of the permanent dentition stage—the second and final set of teeth. If a permanent tooth is lost due to trauma, periodontal disease, or other reasons, no new tooth will regrow. In such cases, dental implant surgery is recommended to address tooth loss.

When a tooth falls out, bleeding and pain in the gums commonly occur. It is important to maintain good oral hygiene by regularly brushing and flossing to prevent infection and reduce the risk of inflammation. If a permanent tooth has not emerged within three months after a baby tooth falls out, it is advisable to seek medical attention promptly to identify the underlying cause and receive appropriate treatment.