Health and Dental Care

How long does a tooth take to come in?

How long does a tooth take to come in?

Understanding the Tooth Eruption Process

If you've ever observed tiny humans, namely babies (I used to watch my niece while my sister was at work, which squarely falls into that 40% chance of personal anecdotes) - you will know that teething is a significant phase they go through. It's fascinating, equal parts torturous (from all the sobbing and drooling), and mystifying. New teeth seem to magically sprout out overnight - or so it appears. But, how long does a tooth actually take to come in? Well, that's what we'll be diving into today, looking into the depths of our mouths to unravel the grand mystery of tooth eruption.

The Timeline of Tooth Development

The meticulous process of tooth development starts long before teeth visibly pierce through the gums. In fact, a baby's teeth begin to form while they're still in the womb - usually around the 6th week of pregnancy. Imagine, you're still just a bun in the oven, and you're already kindling the tools for your future chewing! However, these teeth stay hidden under the gums until the baby is around 6 months old. Yeah, you heard that right, an average of six months wait before those tiny pearls start gracing the baby's mouth.

Stages of Tooth Eruption

After the prolonged seclusion period, the teeth finally make their grand entrance. But, even then, the process is gradual, not instantaneous. The tooth eruption generally happens in stages, with incisors leading the battalion. These are followed by canines and molars. Mind you, I say 'generally' because babies, like us grown-ups, have their own schedules; so, the actual timeline can vary a bit, making it more intriguing than your favourite thriller.

The Primary Teeth Milestone

Typically, the lower central incisors are the pioneer troopers to erupt. Next in line are the upper central incisors. By the time the kid is about a year old, they usually have around six teeth in their miniature mouth. Talk about amassing wealth quickly!

Undeterred Progress of Tooth Eruption

Now, this tooth exhibition doesn't stop at one-year-old. By the time a kid is two or three, they have a full set of primary teeth - 20 pearly whites! I mean, if it were a marathon, teeth would be setting some serious records. But interestingly, this marathon doesn't quite have a finish line – or at least not an ultimate one!

Bracing for the Secondary Teeth Arrival

You see, the saga of tooth eruption doesn't end with primary teeth. Roll the drums, because the secondary teeth, also known as permanent teeth, are set to make their appearance, starting from around six years of age. Alas, tooth fairy budget also needs to be significantly increased at this stage.

Understanding the Arrival of Wisdom Teeth

The plot thickens, my friends, as this sequence concludes with the eruption of third molars, commonly known as wisdom teeth. These so-called wisdom grants typically show up between the ages of 17 and 21. Side note here: Why are they called wisdom teeth? Do they bring wisdom with them? From my experience, they only brought me a lot of pain and a few days of liquid diet. That's not very wise now, is it?

Tooth Eruption Delays

Now, not all teeth rise to the challenge and make a timely appearance. Sometimes, there can be delays due to a variety of reasons, genetic or otherwise. So obviously, if your kid hasn't started teething at six months, don't call the local news station just yet. Give it some more time. But if there is a significant delay, do check with a dentist. They're like the detectives of the dental world, very handy in these situations.


To recap, the tooth journey from development to eruption is quite a lengthy process, spanning from pregnancy to early adulthood. But hey, good things take time, don't they? Without these teeth, how would we relish our favourite cookie, or steak, or the amazing spread during Thanksgiving? So, next time you see a baby crying their hearts out due to teething, remember - their journey has just begun. And, don't forget to save a penny or two for the tooth fairy!

Amelia Tinker
Amelia Tinker

As a stomatologist, I have a time-honored reputation for providing high-quality dental care. I currently practice in Perth, Australia, and I absolutely love what I do. Helping people achieve a healthy and beautiful smile is my topmost priority. Aside from my medical career, I cultivate my interest in writing about oral care topics, specifically péče o zuby. When I am not working or writing, you can often find me in my garden or with my nose in a novel.

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