How Long Does Invisalign Take? | Board Certified Orthodontist Explains

So, you’re interested in Invisalign. But naturally, you have some questions.
Most likely near the top of your list is the question: how long does Invisalign take?
Whether you’re planning treatment around a big life event or you simply want to know what to expect, knowing the Invisalign process timeline can be helpful for wrapping your head around treatment and starting treatment confidently.
So what’s the answer? The short answer is that most patients complete treatment in about 12 to 18 months. However, like many things in orthodontics, the answer is a bit more nuanced than that, with the length of treatment being dependent on factors like the complexity of your case and how your mouth responds to treatment.
Since everybody’s case is unique, the best way to get an accurate timeline estimate for your Invisalign treatment is to schedule an initial orthodontic consultation. However, in this article we’ll still give you plenty of info so you can at least get an idea of how long Invisalign treatment takes and why. So let’s get to it!
The Short Answer: How Long Does Invisalign Take?
Invisalign treatment uses a series of custom clear plastic trays that gradually move your teeth into alignment. So when you’re asking the question of how long is Invisalign treatment, you’re really asking about the length of time from the first set of trays to the last.
The biggest factor that determines the average length of Invisalign treatment is case complexity, so let’s break the averages down by that:
Mild cases: 6-9 months
Moderate cases: 9-15 months
More complex cases: 12-24 months
Treatment timelines exist on a wide spectrum, where slight adjustments may be relatively quick, while other more complex cases, especially if they involve a bite correction, can require 2+ years of treatment. So, if the reason you’re reading this blog is because you’re wondering how long does Invisalign take to straighten teeth, just know that you might not have a great idea of your individual timeline until you go and see an orthodontist.
When Will You Start Seeing Results?
Slightly different than total treatment time, but still a common question that we get is: how long does it take for Invisalign to work? As in, when will you start to notice results?
The great thing about Invisalign is that it starts working almost immediately. As soon as you put your first set of trays in, they begin applying consistent pressure, which starts the process of gradually shifting your teeth.
Most patients will notice a visible difference in about 4 to 8 weeks, so it’s really not much of a wait before you start seeing real results.
Since Invisalign treatment is a series of plastic trays, you may also be wondering how long you wear each aligner set for. Each set of aligners is designed to move your teeth slightly, and you’ll often switch to the next set after about 1 to 2 weeks.
Invisalign Timeline: What to Expect Step-by-Step
When you know the full Invisalign process timeline, it can make the experience feel a lot more manageable, so let’s break it down into steps.
Initial Consultation and Planning
The first step for any orthodontic treatment is an initial orthodontic consultation. During this stage we’ll examine your mouth, take digital scans of your teeth, learn about your goals, and answer any questions you may have. We’ll then put together a treatment plan, where you’ll know both what we recommend and why we recommend it.
Getting Your Aligners
After your plan is finalized, your scans are used to manufacture your aligners. If you’re wondering how long does it take to get Invisalign, it typically takes about 2 to 4 weeks for your aligners to be fabricated and shipped to the office.
Active Treatment Phase
You’ll wear your aligners for 20 to 22 hours per day, and will switch to a new set every 1 to 2 weeks. This active treatment phase makes up the majority of your Invisalign treatment time, and depending on the range of factors we already mentioned, you could be in the active treatment phase for anywhere from 6 to 24 months.
Refinements (if needed)
After treatment, it’s possible that you may need small adjustments or refinements to dial in your final result. With orthodontic treatment, patience can often be the key to great results.
Retainers
The final piece to any Invisalign treatment is a retainer. Getting a retainer will prevent your teeth from shifting back, preserving your result in the long-term.
What Affects How Long Invisalign Takes?
There are a few things that impact how long your Invisalign treatment takes. A couple of these are out of your control, but one is very much in your control and matters a lot.
Case Complexity
The more movement that’s needed to correct a person’s spacing, crowding, or bite, the longer the treatment timeline. Some patients wonder how long does Invisalign take for mild crowding and the answer is that in many cases, it’s on the shorter end of the timeline. Generally, the simpler the movement, the faster the results.
Patient Compliance
Wearing your aligners the recommended 20 to 22 hours per day is critical for making sure your treatment stays on track. If you don’t wear your aligners consistently, you can significantly increase your Invisalign treatment team, and make treatment more complicated.
Biological Response
Everyone’s body is unique and responds to treatment differently. For example, age and bone density are two factors that can have a big impact on how quickly teeth respond to treatment. Someone who’s younger and still growing will often have teeth that move more easily, while an adult’s teeth are more resistant to change, and therefore have a slower process.
How to Make Invisalign Work Faster
If you want to stay on the shorter end of your timeline there’s a few ways to do that:
- Wear your aligners consistently, sticking to the recommended 20 to 22 hours per day.
- Stay on schedule with switching your aligners. Often every 1 to 2 weeks.
- Keep up with your appointments, so your orthodontist can make sure everything is on track.
Consistency and compliance are key to making sure your treatment is as efficient as possible, and ensuring you get the best results possible.
Conclusion
As you can see, “how long does Invisalign take?” doesn’t have a super straightforward answer, and depends on a wide range of factors from your biology, to the complexity of the case, to how consistently you wear your aligners. While most patients will fall into the 6 to 18 month range, your exact timeline is unique to you and your situation.
Ultimately, the best way to know how long Invisalign treatment will take is to book an initial orthodontic consultation, so if you’re in the San Antonio area, and are looking for a trusted and quality orthodontist, give us a call at Pierson and Saunders, and we’ll make sure you’re in good hands when you embark on your Invisalign journey.


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