If you are thinking about straightening your teeth, it is natural to wonder what is actually going on inside your mouth. Teeth can look solid and permanent, so the idea that they can shift at all may feel surprising. This guide walks through the biology in plain language, so you know what to expect and feel more comfortable asking questions at your visit.
Teeth live in living bone
Each tooth sits in a socket of bone. Between the root and the bone is a thin cushion of tiny fibres called the periodontal ligament. Because bone is a living tissue that can reshape itself, a tooth is not locked in place the way a post set in concrete would be.
That is the whole principle behind orthodontic movement: gentle, steady pressure gives the bone a reason to adapt.
The two sides of every movement
When an aligner presses on a tooth, the tooth is guided in one direction. Two things happen at the same time:
- On the leading side, bone cells slowly clear away bone so the tooth has room to move.
- On the trailing side, new bone fills in behind the tooth.
Repeated across a series of aligners, this steady remodelling carries the tooth to its planned position.
Why small steps matter
Each set of aligners is shaped to move your teeth only a little further. Most people change to the next set every one to two weeks, as their dentist directs. Moving slowly gives the bone time to keep up, which is why treatment is a series of modest steps rather than one big push.
Why wear time is part of the plan
Because steady pressure is what moves teeth, the usual goal is 20 to 22 hours a day. A simple routine helps:
- Take aligners out to eat.
- Take them out for any drink other than water.
- Take them out to brush and floss, then put them back in.
If your aligners spend long stretches in a case, the pressure is not there to do its job. Your dentist can help you build habits that fit your day.
What aligners may be able to help with
Clear aligners can help with many cases of crowded teeth, gaps between teeth, overbite, underbite and crossbite. Not every smile is a match, so a dentist needs to examine your teeth and talk through your goals before recommending a path.
Why a retainer is the final step
When teeth reach their new position, the surrounding bone and fibres still need time to settle. Until they do, teeth can drift back, especially in the first months. A retainer holds your results in place. Wear it as your dentist advises, and ask what to do if it ever feels tight or gets damaged.
Questions worth asking at a consultation
- Is my case a good fit for clear aligners?
- How many sets might I need, and how often will I switch?
- How often will you check my progress?
- What will my retainer routine look like?
- What will it cost, and what might my insurance cover?
You can see how our approach to digital scans and treatment planning works in the original post on how Invisalign moves teeth. If you live in South Surrey or White Rock and would like to talk through your options with a dentist, you can learn more on the main website.
Slow, steady and well planned is how teeth move comfortably. Understanding the process makes it easier to enjoy it.