What is an overbite?

What is actually being measured

Overbite specifically describes vertical overlap: how far down the upper front teeth reach over the lower ones. It gets confused with a related but different word, overjet, which measures something else entirely: how far forward the upper front teeth stick out horizontally, away from the lower ones. A mouth can have a pronounced overbite with almost no overjet, or the other way around, and the two get evaluated and, if needed, treated somewhat differently.

Mainstream dental sources treat some overlap as a normal, ordinary feature of a developing bite rather than a flaw. The exact amount varies a good deal from child to child, and because jaws and teeth keep shifting through childhood, an overbite at five can look noticeably different by ten. That is part of why it tends to be tracked over several years rather than judged from a single visit.

It depends on what is driving it

An overbite can come from a few different directions, and telling them apart matters for what, if anything, gets done about it. Some are largely inherited, tied to the natural size and shape of the jaws in a family. Others are shaped by habits: prolonged thumb sucking, extended pacifier use well past toddlerhood, or a tongue that consistently rests low and forward can all push front teeth in a direction that adds to an overbite over time.

There is also a difference between a dental overbite, where the teeth themselves are angled or positioned to overlap more, and a skeletal one, where the upper and lower jaw bones are proportioned differently from each other. The two can look similar in a smile but call for different approaches, which is exactly why this is not something to sort out from a photo. Ask your pediatric dentist which pattern fits your child.

When this turns into an appointment rather than a wondering

An overbite is not an emergency, so there is rarely a reason to call urgently about one. There is a well-known marker worth knowing instead: the American Association of Orthodontists recommends a first orthodontic evaluation no later than age 7, and early evaluations here happen sometimes as young as 7 or 8 when growth calls for it. That age is a checkpoint for a first look, not a deadline or a sign that treatment is starting.

A few things are worth mentioning sooner than that routine marker: a child having real trouble biting into food, lower teeth that consistently contact the roof of the mouth or the gum behind the upper teeth when biting down, or a child becoming self-conscious about how their bite looks or feels. None of those are dramatic, but any of them is a reasonable thing to bring up at the next visit rather than wait on.

Where this fits into routine care

Growth and how the bite is meeting get checked at every routine visit already, so most overbites are being tracked long before anyone uses the word out loud. Nothing separate needs to be scheduled just to start that conversation. When a closer look does earn its place, that happens with our orthodontics team, working from the same growth history your child's dentist has already been building.

Curious where your child's bite currently stands, or have a habit you want to mention? Ask at the next checkup or call either office: (239) 482-2722. More parent questions like this one are answered at quick answers.