After teeth whitening instructions

                                                                           Important notes

1- Do not smoke, drink or eat anything but water during the first 60 minutes after the treatment. (Teeth Whitening gel opens the enamel pores making your teeth vulnerable to staining agents).
2- Do not smoke, eat or drink staining foods after treatment for a period of 24 to 48 hours.  Avoid tea, coffee, red wine, fizzy drinks, currie dark green vegetables and tomato based sauces etc.
3- Use your At home teeth whitening kit once a day for the first 2-3 days then once every 2-3 days until the gel runs out. (This will help you maintain the achieved whitening results and avoid a quick relapse.)
4- DO NOT consume acidic drinks or foods after the whitening treatment for 3-6 days. This could cause severe sensitivity.

Why is it so important to avoid consuming foods and drinks that contain stain?

Approximately sixty percent of our body weight is water and our teeth are not an exception. Research has shown that during laser teeth whitening treatment a process called dehydration occurs. Dehydration helps removing stain located inside the tooth structure. After whitening treatment. your teeth will naturally try to absorb the water lost during the treatment from saliva and liquids consumed. The process of re-absorbing this lost water lasts anywhere between 24 to 48 hours. During this time it is very easy for stain to penetrate the enamel diminishing the whitening results. This is the reason why you should refrain your self from consuming foods and drinks that contain heavy stains. If you have to  have  a coffee or tea in the  morning we recommend using a straw and try rinsing your mouth with water right away. More details about  what can you eat after teeth whitening.

Tooth sensitivity

Although uncommon, some people can experience some tooth sensitivity during the first 24-48 hours after the Laser Teeth Whitening treatment. People with existing sensitivity, recently cracked teeth, open cavities, leaking filings or severe recession of the gums are more likely to experience some sensitivity due to their previous conditions. For these preconditions we use professional desensitizing agents to decrease any possible sensitivity that might occur during or after teeth whitening treatment. If sensitivity persists at home after the treatment we recommend using Sensodyne , Colgate Sensitivity toothpaste or over the counter fluoride gel or liquid. Sensitivity tends to remain for a couple of hours and than disappears.

  • You can use pain killers like Tylenol or Advil over the counter to help you with sensitivity.
  • Massage your gums with warm (not hot) salty water for a minute. Prolonged exposure to salt will dry your mouth and it is not recommended more then 3-4 times.
  • During this time avoid cold or hot drinks and try to distract your attention by watching TV, listening your favorite music or reading a book.
  • If  you experience tooth sensitivity from your at home teeth whitening kit: Do not continue the treatment until your sensitivity has completely disappeared.
  • If the level of pain or sensitivity increases drastically you should contact your Dentist


After Teeth Whitening treatment, it is normal for teeth color to regress somewhat over time. This is normal and should be very gradual, but it can be accelerated by exposing the teeth to various staining agents, such as coffee, tea, tobacco, lip stick, red wine etc. During the first post-treatment hour do not eat or drink anything except water. If you purchased the JUSTSMILE AT HOME Touch up pen, be aware that the pores of your enamel will remain open during the treatment, so you should refrain from staining agents until you stop using the pen. Normal habits can resume 24-48 hours after the initial JUST SMILE AT HOME treatment.


Some individuals might be unaware that are allergic to Hydrogen Peroxide, substance in the whitening gel. If blisters or swelling of your lips appear hours after the professional treatment or during your At Home Teeth Whitening treatment, you are most likely having an allergic reaction and you should immediately contact your dentist or physician.


How long the results will last depends on two factors:

  1. Your habits
  2. The porosity of your teeth

If teeth are exposed to staining agents such as tobacco, red wine, tea coffee on regular basis, your whitening results will not last as long as if you didn’t use any of these products in regular basis. If you have naturally porous enamel, your teeth will be more vulnerable to staining agents therefore you will get stained teeth sooner then the average person. Unfortunately there is no way we can find out the level of porosity of your teeth ahead of time.

In cases of porous enamels and if teeth are exposed to staining agents on regular basis, results may last up to a 3-6 months. In cases of non-porous enamels and non exposure to staining agents on a regular basis results may last for up to 2 years.

DON’T FORGET: Your safety is our main goal as Dental Hygienists so don’t hesitate to contact us for any concerns or questions you might have before, after or during the At Home whitening treatment.


  1. unknown says:

    dont eat curry after!! big mistake

  2. Celebrating Life says:

    Brush your teeth twice daily for white stain free teeth

  3. John Weedmark says:

    Hello, I’m thinking about whitening my teeth. I tried it several years ago using an at home kit bought from my dentist.
    I had to stop the treatment almost immediately do to sensitivity.
    Needless to say, I need to be assured of good pain management.
    Also, it’s probably smart to have a cleaning before the whitening? Can you provide a cost quote.

    Thank you.
    John W.

    • Thia says:

      I just had it done today. I had a cleaning right before, not sure if it was a good idea but you do want at least a polished surface and a cleaning sometime before. Anyway, my teeth are somewhat sensitive, (I like acidic food idk) and WOW it kind of was weird and uncomfortable during, but now 7 hours later I am having extreme sensitivity. Like. It’s pretty bad. I hope it goes away soon. I rinsed with warm water, used a fluoride solution, sentitvity toothpaste, (just rubbed them on with my finger or a q tip) and took ibuprofen.

      • Dental Hygienist says:

        Hi Thia,
        Sensitivity is a reversible process which is in some cases unpredictable. Reversible means that sensitivity will disappear and it is a temporary side effect. While it is not very pleasant experiencing these symptoms it eventually disappears. Hope you liked the results

  4. Karen says:

    I just got home from getting whitening done and it looks pretty good little bit of sensitive teeth but over all real good!Im getting a bridge put in on my front teeth soon so ill look better.TK


  1. At home teeth whitening guide | Teeth Whitening in Toronto - [...] your lips and your gums after the treatment. For recommendations after treatment you can read Teeth Whitening Instructions. If…

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