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

905 770 2111

Tooth number

Each tooth is represented by a 2-digit number. The upper and lower arch each contains 8 permanent teeth numbered from the midline toward the back from 1 to 8 for the adult dentition.
Each arch is subdivided in 2 quadrants or semi-arches, a right and left one, indicated by the first digit. The upper right quadrant is #1, and the left one is #2. The lower arch includes quadrants #3 (at the bottom left) and #4 (at the bottom right).
Teeth in quadrant #1 are numbered starting with “1” followed by the number identifying the tooth (1 to 8). Teeth in quadrant #2 start with “2” and so on for each quadrant.



  • 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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