Which teeth whitening strip is the top?

Author: Edwin Kiehn  |  Last update: Thursday, August 7, 2025

Our top pick for the best whitening strips for fast results is the Crest 3DWhitestrips 1-Hour Express. These teeth whitening strips are designed for single-use sessions and can whiten teeth effectively in just one hour, with results lasting for up to six months.

Which is the upper strip teeth whitening?

The longer strip is for your top teeth and the shorter strip is for your bottom teeth.

Which whitening stripes go on top and bottom?

Which strip goes on the top and bottom? The longer strip goes on the top, the shorter one on the bottom.

Which whitening strips go where?

Carefully read the teeth whitening instructions. 2. Apply the strips to your teeth, gel side against the surface of the tooth, being careful to not place it on the gums. There is usually a strip for the top teeth and another for the bottom teeth and they should be placed just below the gum line.

Which is the upper whitening strip?

Use the longer strip for your top teeth and the shorter strip for your bottom teeth.

TOP 5 Best Teeth Whitening Strips 2025

Which way round do whitening strips go?

To apply, simply remove the whitening strip from its liner and place the gel side to your teeth, aligned with your gum line. Press against your teeth for best contact and fold the remainder of the strip behind your teeth.

Why is only the bottom of my teeth whitening?

The most common cause of uneven color after teeth whitening is the uneven application of products used. This can happen with the bleaching gel at your professional dentist and the peroxide solution in your at-home teeth whitening kits. In some cases, this can be a fault of the product.

What happens if you leave whitening strips on longer than 30 minutes?

You might be tempted to leave whitening strips on your teeth for a little longer, but this will increase the risk and severity of side effects like sensitivity and gum irritation. In some cases, overuse of whitening strips has even led to chemical burns on the gums.

Why do whitening strips only cover the front teeth?

We do not recommend using Crest 3D Whitestrips on your back teeth because the strips are specially designed to fit front teeth — the teeth shown when you smile. If you use Whitestrips on the back teeth, the strips may become loose and eventually fall off during the wear period as a result.

Does saliva ruin whitening strips?

Can I Swallow my Saliva While using Whitening Strips? Yes, you can swallow your saliva while using whitening strips, as most bleaching agents in the strips are safe for oral use and ingestion in small amounts. But you do not need to swallow excessive amounts of saliva while using the strips.

How to properly use whitening strips?

How to Place Whitening Strips On Correctly
  1. Step 1: Choose the Right Whitening Strips. ...
  2. Step 2: Clean Your Teeth Before Applying. ...
  3. Step 3: Unwrap and Apply the Whitening Strips. ...
  4. Step 4: Press and Adjust the Strips. ...
  5. Step 5: Wait for the Recommended Time. ...
  6. Step 6: Remove the Strips and Rinse.

Can I use hydrogen peroxide to whiten my teeth every day?

But you need to know that hydrogen peroxide isn't safe to use daily, especially in high concentrations. You need to give your mouth rest to avoid irritating your gums and increasing tooth sensitivity. If you apply hydrogen peroxide multiple days in a row, it can lead to enamel erosion.

What's the difference between all the Crest Whitestrips?

The Crest 3D Whitestrips 1-Hour Express box has 10 treatments; the company advertises that it brightens teeth up to 12 shades whiter. By comparison, the original strips use lower concentration bleaching agents and claim to deliver results up to six shades whiter.

Do I use crest 3D white strips every day?

The strips are applied to upper and lower teeth, once a day, for up to 30 minutes. Depending on the specific Crest 3D White Whitestrips product chosen, strips should be applied daily for anywhere from 10 to 20 consecutive days.

Do non-peroxide whitening strips work?

A double-blind placebo- controlled clinical study was conducted to evaluate initial color improvement after a single-use application of the newly marketed non-peroxide bleaching system. The results of our study demonstrated that the nonperoxide bleaching system is effective.

Why not brush teeth before white strips?

Wait before applying Whitestrips: It's essential to wait 30 minutes after brushing before applying Whitestrips. Brushing can temporarily weaken your enamel, making it more sensitive. Waiting allows your teeth to recover and minimizes the risk of sensitivity.

Will my teeth go back to yellow after whitening?

With time, these tannins cling to your teeth's enamel and create yellowish stains. Similar to this, frequent use of tobacco products or cigarette smoking might cause your teeth to remain yellow even after whitening procedures. A yellow coating on your tongue could also be noticed.

How to maximize crest white strips?

6 Tips When Using Teeth Whitening Strips
  1. Consistency Matters. Teeth whitening strips should be applied to the teeth on a daily basis. ...
  2. Brush Your Teeth Prior to Application. ...
  3. Avoid Uneven Whitening. ...
  4. Use Teeth Whitening Strips in Moderation. ...
  5. Avoid Contact With the Gums. ...
  6. Do Not Consume Dark Food or Beverages After Whitening.

What teeth won't whiten?

Here are some top reasons why your teeth whitening treatment is not successful:
  • Your Teeth Aren't Clean. ...
  • You Have Too Many Dental Restorations. ...
  • You Have Intrinsic Stains. ...
  • You Need a Professional-Grade Product.

Why do my teeth look grey after whitening?

Why Did Your Tooth Turn Gray After Whitening It? There are several things to consider: It may be that your tooth was damaged before you applied the whitening gel to it, and it became irritated afterward. The problem might stem from the whitening gel.

How can I deep whiten my teeth?

For optimal whitening, a person can try brushing with a mix of baking soda and hydrogen peroxide for 1–2 minutes twice a day for a week. They should only do this occasionally. Hydrogen peroxide may increase tooth sensitivity, so it is not suitable for long-term use or for people who already have sensitive teeth.

Does saliva affect teeth whitening strips?

You're experiencing a natural reaction between your saliva and the whitening agent on our Whitestrips. Saliva increases whenever you place an object of any kind in your mouth. As saliva increases, it also reacts with the whitening agent and together they make foam.

Should your teeth be wet or dry when applying whitening strips?

The general rule of thumb is that your teeth should be dry when applying whitening strips. Moisture can interfere with the adhesion of the strips to your teeth, reducing their effectiveness. Before applying the strips, it's crucial to ensure your teeth are clean and completely dry.

Do you wash your mouth out after using crest white strips?

After removing the whitening strips, it's crucial to rinse your mouth thoroughly to remove any residual gel. Take a moment to examine your teeth in the mirror, appreciating the initial results. It's common to notice an immediate improvement in the shade of your teeth, which can be quite satisfying.

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