Most children lose their first baby tooth around age 6, though some start as early as 5 or as late as 7. The process continues for several years, and by age 13, most kids have a full set of permanent teeth. That’s a roughly seven-year window of wobbly teeth, gap-toothed grins, and visits from the tooth fairy.
The Typical Timeline
Age 6 is the landmark most parents watch for, but there’s a wide range of normal. Some children notice a loose tooth in kindergarten, while others don’t lose one until second grade. The Mayo Clinic notes that sometimes the process doesn’t begin until about a year after the typical starting point, which is nothing to worry about on its own.
Once that first tooth falls out, the rest follow a fairly predictable schedule over the next six to seven years. The early years (ages 6 to 8) bring the loss of the front teeth. The later years (ages 9 to 12) bring the loss of the side and back teeth. By 13, the transition is usually complete.
Which Teeth Fall Out First
Baby teeth generally fall out in the same order they arrived. The sequence looks like this:
- Lower central incisors (bottom front two): usually the first to go, around age 6
- Upper central incisors (top front two): shortly after, often between ages 6 and 7
- Lateral incisors (the teeth flanking the front ones): around ages 7 to 8
- First molars: around ages 9 to 11
- Canines (the pointed teeth): around ages 9 to 12
- Second molars (the back baby teeth): around ages 10 to 12
This order isn’t set in stone. Some kids lose an upper tooth before a lower one, or a canine before a molar. Minor variations are common and rarely signal a problem.
What’s Happening Inside the Gums
A baby tooth doesn’t just pop out on its own. Beneath it, the permanent tooth is slowly pushing upward, and this triggers a biological process that dissolves the baby tooth’s root from the inside out. Specialized cells break down the root tissue bit by bit, almost like a demolition crew clearing the way for new construction. At the same time, the body sends immune cells into the area to help manage the process, creating a mild inflammatory environment that accelerates the breakdown.
The pressure of everyday chewing also plays a role. Mechanical stress on a baby tooth signals the surrounding tissue to ramp up root breakdown. This is why a loose tooth seems to get looser with every meal. By the time the root is mostly dissolved, only a thin connection holds the tooth in place, and it falls out with minimal effort or bleeding.
Permanent Teeth Arriving Alongside the Losses
While baby teeth are falling out at the front, new permanent teeth are quietly appearing at the back. The first permanent molars, sometimes called “six-year molars,” typically erupt between ages 6 and 7. These don’t replace any baby tooth. They come in behind the last baby molar, so parents sometimes miss them entirely.
This is worth paying attention to because first molars are the teeth your child will use most for chewing throughout their life, and they arrive when kids are still developing their brushing skills. Dental sealants, thin protective coatings applied to the chewing surfaces of these molars, are one of the most effective ways to prevent cavities in those early years.
When Tooth Loss Happens Too Early
Losing a baby tooth before age 4 or 5, well ahead of the natural schedule, can create problems. A baby tooth isn’t just a placeholder. It guides the permanent tooth into the correct position. When it’s lost prematurely, neighboring teeth can drift into the gap, crowding out the permanent tooth and leading to alignment issues later on.
The most common causes of premature tooth loss are:
- Tooth decay: Cavities that go untreated can weaken a tooth to the point that it breaks apart or needs extraction.
- Trauma: Falls, collisions during play, and sports injuries can knock teeth out early.
- Gum disease: Though rare in young children, gum infections can weaken the structures holding a tooth in place.
- Genetic or medical conditions: Some children have enamel that forms thinner or weaker than normal, making teeth more vulnerable.
If your child loses a baby tooth early from injury or decay, a pediatric dentist may recommend a space maintainer. This is a small device that holds the gap open so the permanent tooth can come in straight when it’s ready.
When Tooth Loss Seems Late
Some children still have most of their baby teeth at age 8 or 9, and that’s usually fine. The timeline varies based on genetics, nutrition, and individual development. Girls tend to lose teeth slightly earlier than boys, on average. If your child hasn’t lost any baby teeth by age 8, it’s reasonable to mention it at a dental visit, but late loss on its own is rarely a concern.
Occasionally, a permanent tooth erupts before the baby tooth falls out, creating a “shark tooth” appearance where two rows are briefly visible. This happens most often with the lower front teeth. In most cases, the baby tooth loosens and falls out within a few weeks once the permanent tooth is in. If the baby tooth stays firmly rooted for more than two or three months with the permanent tooth fully visible behind it, a dentist can remove it with a simple extraction.
Caring for New Permanent Teeth
Permanent teeth arrive with thinner enamel than they’ll eventually have. It takes a few years after eruption for the enamel to fully harden, which means newly erupted permanent teeth are especially vulnerable to cavities. Fluoride toothpaste helps strengthen that developing enamel, and twice-daily brushing matters more during this stage than almost any other.
Kids in the mixed-dentition phase, where baby and permanent teeth sit side by side, also have more uneven surfaces and gaps where food can get trapped. Flossing becomes important once two teeth sit snugly next to each other. Many children need help with flossing until around age 10, when their fine motor skills catch up to the task.