Pediatric Dentistry

When Do Baby Teeth Fall Out? The Full Timeline

Published July 2, 20269 min read

One of the questions parents ask most consistently at pediatric dental visits is some version of the same thing: is this normal? A wiggly tooth at six, a tooth that came out at five, a permanent tooth coming in while the baby tooth is still there, the timeline of losing baby teeth is wide enough that almost anything seems possible, and parents often have no good frame of reference for what the process actually looks like. This guide covers when do baby teeth fall out, the full eruption and shedding timeline, and when early or late tooth loss warrants attention.

At Willow Family Dentistry in Wylie, TX, Dr. Esther B. Jeong fields these questions at nearly every pediatric appointment. Having a clear picture of the expected timeline is genuinely useful for parents, since it reduces unnecessary anxiety about what is normal and helps identify the situations that actually do need professional attention.

When Do Baby Teeth First Come In?

Baby teeth typically begin erupting around 4 to 7 months of age, with most children having all 20 primary teeth by age 3. The lower front teeth usually arrive first, and the process spans roughly two to three years from first tooth to last molar.

Baby teeth typically begin erupting around 4 to 7 months of age, with the lower central incisors, the two front bottom teeth, usually appearing first. By around age 3, most children have all 20 of their primary teeth. According to the American Dental Association, children have approximately 20 primary teeth by age 3, and most children lose their first baby tooth around age 6. The eruption process spans roughly two years, though the exact timing varies considerably from child to child, and arriving outside this window by a few months in either direction is generally within normal range.

Understanding when baby teeth come in matters for the falling-out timeline because the two are linked: teeth tend to fall out in roughly the same order they came in, and at approximately the same relative timing. A child whose teeth erupted on the earlier side of normal will often lose them earlier too.

According to the American Dental Association's MouthHealthy eruption chart, the full eruption sequence for primary teeth spans from around 6 months for the first teeth to around 33 months for the second molars. This two-and-a-half-year window reflects just how variable the eruption timeline can be across children.

When Do Baby Teeth Start Falling Out?

When do baby teeth fall out? Most children lose their first tooth around age 6, starting with the lower central incisors. The full shedding process spans from about age 6 through age 12 or 13, when the last baby molars and canines are replaced.

Baby teeth typically start falling out around age 5 to 7, beginning with the lower central incisors, the same teeth that came in first. The process of losing all 20 baby teeth and replacing them with permanent ones spans roughly six to seven years, usually completing between ages 12 and 13 when the second permanent molars come in. Most children lose their first tooth around age 6, though anywhere from 4 to 8 is within the normal range.

The shedding process is driven by the permanent tooth developing beneath the baby tooth and applying pressure to its root. As the permanent tooth pushes upward, the root of the baby tooth gradually resorbs, which is why a naturally lost baby tooth typically has a shorter, rounded root stub rather than a full-length pointed root. This resorption is what makes the tooth wiggly, and it is a healthy, normal process rather than anything to worry about.

The table below covers the approximate shedding timeline for each type of tooth. These are averages; individual variation is significant.

What Happens if a Baby Tooth Falls Out Too Early?

When a baby tooth is lost significantly before its expected shedding age, neighboring teeth can drift into the empty space and block the permanent tooth from erupting correctly. This is why early tooth loss is worth evaluating promptly rather than treating as routine.

When a baby tooth is lost significantly earlier than expected, the concern is that the neighboring teeth will drift into the empty space, reducing or eliminating the room the permanent tooth needs to erupt properly. Baby teeth are not just temporary; they actively hold space in the jaw for the permanent teeth developing beneath them. Losing that space guide early can lead to crowding and misalignment when the permanent tooth arrives.

Early tooth loss most commonly results from decay, trauma, or dental infection. A tooth lost a year or more before its expected shedding time may warrant a space maintainer, a simple dental appliance that holds the gap open until the permanent tooth is ready to erupt. Whether a space maintainer is needed depends on which tooth was lost, how early, and what the X-rays show about the developing permanent tooth's position and timeline.

This is one of the clearer examples of why keeping up with regular pediatric dental visits matters, since early tooth loss caught and addressed promptly results in a much simpler outcome than the same tooth loss discovered a year later when the neighboring teeth have already shifted. Our article on cavities in baby teeth covers why primary tooth decay is worth treating even when the tooth will eventually fall out anyway.

What Happens if a Baby Tooth Doesn't Fall Out on Time?

A baby tooth that stays past its expected shedding date is usually held by a delayed or misaligned permanent tooth developing beneath it, or occasionally by a congenitally missing permanent tooth. A dentist visit with X-rays quickly clarifies which situation applies.

A baby tooth that does not fall out on its expected schedule is usually held in place because the permanent tooth developing beneath it is delayed, growing in the wrong direction, or missing entirely. In some cases, the permanent tooth has already erupted beside or behind the baby tooth rather than pushing it out, a situation sometimes called a shark tooth for its double-row appearance.

If the permanent tooth erupts while the baby tooth is still firmly in place and not loosening, a dentist visit is warranted sooner rather than later. Often the baby tooth simply needs to be extracted to give the permanent tooth room to move into the correct position on its own. Left unaddressed for too long, a persistent baby tooth can cause the permanent tooth to become stuck or erupt in a permanently misaligned position.

Retained baby teeth in older children and teenagers can also indicate that a permanent tooth is congenitally missing, a condition affecting a small percentage of the population. X-rays confirm whether a permanent tooth is developing beneath the retained primary tooth or whether the space will eventually need to be managed with an implant or bridge in adulthood.

What Is a Space Maintainer and Does My Child Need One?

A space maintainer is a dental appliance that holds the gap left by an early-lost baby tooth, preventing neighboring teeth from drifting and crowding out the permanent tooth. Whether a child needs one depends on which tooth was lost, how early, and what X-rays show about the developing permanent tooth.

A space maintainer is a dental appliance, either fixed or removable, that holds the gap left by an early-lost baby tooth to prevent neighboring teeth from drifting and crowding out the permanent tooth's eruption path. It is the standard of care recommendation for most cases of premature baby tooth loss, particularly when the permanent tooth is more than a year away from erupting.

Fixed space maintainers are attached to neighboring teeth and stay in place until the permanent tooth erupts. They require no patient compliance and are generally preferred for younger children. Removable maintainers look similar to a retainer and are better suited for older children who are responsible enough to wear them consistently.

Not every early tooth loss requires a space maintainer. The decision depends on which tooth was lost, how early, the position and timing of the developing permanent tooth, and the child's overall dental development. Your dentist can evaluate these factors and give a clear recommendation based on current X-rays rather than a general rule. The American Academy of Pediatric Dentistry, whose resources for parents are available at aapd.org, recommends space maintainers as a routine part of managing premature tooth loss in children.

When Should You Call the Dentist About Baby Teeth?

Call the dentist if your child loses a tooth before age 4 from something other than normal loosening, if a permanent tooth has erupted beside a baby tooth that is not loosening, or if you notice swelling or signs of infection near a tooth. When in doubt, a quick checkup with X-rays provides a clear answer.

You should call the dentist if your child loses a tooth before age 4 from something other than normal loosening, if a permanent tooth is erupting but the baby tooth shows no sign of loosening after several weeks, if there is visible swelling or signs of infection around a loose or retained tooth, or if you are simply unsure whether what you are seeing is within normal range. Calling is always appropriate, and a quick look with X-rays usually provides a clear and reassuring answer.

Regular dental checkups from around age 1 are the best way to track the development of your child's teeth over time and catch anything that warrants early attention. By the time children reach kindergarten, most dentists take X-rays to get a picture of the permanent teeth developing beneath the baby teeth, which is also the point where any crowding or spacing issues can first be seen and planned for. Our article on when a child should first see the dentist covers the checkup schedule in detail.

Willow Family Dentistry welcomes children from their very first dental visit onward and provides pediatric dental care for families throughout Wylie and the surrounding North Texas communities.

Questions about your child's teeth?

Book a pediatric dental visit at Willow Family Dentistry in Wylie, TX. Dr. Jeong will track your child's development and answer any questions about the timeline, early loss, or permanent tooth eruption.