Tooth Number Chart
Last updated: 8th September 2025
The tooth number chart is used by dental professionals to identify and refer to each tooth easily. It follows the Universal Numbering System, which is the most common system used in the United States.
How Teeth Are Numbered
The mouth is divided into four quadrants, and teeth are numbered 1 to 32 in a clockwise direction.
Upper Teeth (Maxillary)
- Upper Right: Teeth 1 to 8
- Upper Left: Teeth 9 to 16
Lower Teeth (Mandibular)
- Lower Left: Teeth 17 to 24
- Lower Right: Teeth 25 to 32
Types of Teeth
Each type of tooth has a specific function:
- Incisors: Front teeth used for cutting food
- Canines (Cuspids): Pointed teeth for tearing
- Premolars (Bicuspids): Teeth used for crushing and grinding
- Molars: Back teeth designed for heavy grinding
Why the Chart Matters
Dentists use tooth numbers to:
- Record dental conditions accurately
- Plan treatments such as fillings, crowns, or extractions
- Track wisdom teeth and orthodontic progress
- Communicate effectively with insurance providers
Using a standardized numbering system helps ensure accurate diagnosis, treatment, and communication in dental care.
Written by
Dr. Jeremie DeZwirek, DDS
Verified Expert
Dr. Jeremie DeZwirek "Dr. Dez" brings a blend of compassion, advanced dental surgical expertise, and state of the art technology to San Marin Dental. He earned his Bachelor's in Molecular Cell Biology from UC Berkeley and his Doctor of Dental Surgery (D.D.S.) from the University of the Pacific, where he graduated with high honors.