10850 Yonge St., Unit 2
Richmond Hill, ON L4C 3E4

905 770 2111

Teeth whitening

How Teeth Whitening Works

Professional whitening products contain either Hydrogen Peroxide or Carbamide Peroxide as the Active whitening Ingredient.
Hydrogen Peroxide is a fast-acting ingredient that release most of its whitening power within 90 minutes, reaching maximum whitening strength at 30 minutes.
In contrast, Carbamide Peroxide releases its whitening power within five hours and reaches its maximum strength in two hours.
Effective results in whitening are driven by length of wear time and concentration of active ingredients in the formula. But the higher the concentration of the active ingredient, the higher the likelihood of sensitivity. That’s why highly sensitive patients should start with a low-HP whitening option, which will have a shorter wear time, or a low-CP concentration.


  • I used to visit Dr. Rostami back in Arizona few years ago. I was on my business trip in Toronto last week and all of a sudden before my meeting one of my front teeth filling came out while I was flossing, shocked and didn’t know what to do, thanks god I remembered  my Canadian dentist back in Mesa, couple of minutes search in the Internet I looked her up and she saw me the same day. I just want to say how I appreciated your help and we all in Arizona have  missed you doc.

    Simon Goli

  • Thank you very much! It was so easy to recommend your office to my husband. My family had seen Rita Rostami for years and now Rita Rostami is really great! Anytime someone I know needs a dentist, I’ll refer them to you. Thank you again,

    Peter Jackson

  • I wanted to let you know how much I appreciated you getting me in on such short notice. Your compassion and understanding has contributed to my strength. Lorrie and the rest of your staff take the steps to make me feel comfortable and at ease. I look forward to seeing you at my treatments

    Smith Jones

10850 Yonge St, Unit#2
Richmond Hill, ON L4C 3E4

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