Tooth Number Converter
Accurately convert tooth notations between FDI, Universal, and Palmer systems for both permanent and primary dentition.
Converted Result
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Tooth Name
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Quadrant
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Dentition
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Source Input
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For Palmer, use format like UR-1, UL-A.
Interactive Dental Chart
Select a tooth to view details and update the converter. Labels show FDI numbers.
Patient's Right Side | Patient's Left Side
Maxillary (Upper)
Mandibular (Lower)
What Is Tooth Numbering?
Dental professionals use numbering systems to uniquely identify and document information about a patient's teeth. The three most common systems globally are the FDI World Dental Federation notation, the Universal Numbering System (primarily used in the US), and Palmer Notation.
Frequently Asked Questions
What is a tooth number converter?
A tool that translates a tooth's identifier from one clinical system to another (e.g., converting FDI tooth 11 to Universal tooth 8).
What is the difference between FDI and Universal numbering?
FDI uses a two-digit system where the first digit indicates the quadrant and dentition, and the second indicates the tooth position from the midline. Universal numbers permanent teeth sequentially from 1 to 32 starting from the upper right third molar.
How are primary teeth numbered?
In FDI, primary quadrants are 5, 6, 7, and 8. In the Universal system, primary teeth are lettered A through T. In Palmer notation, they are represented by letters A through E inside a quadrant symbol.
Does this tool replace a dentist's clinical judgment?
No. This application is solely a reference tool for tooth numbering conversion. It does not provide diagnoses, does not replace clinical evaluation, and users should always adhere to their institution's documentation standards.