Tooth Numbering System in Dentistry | Different types of tooth numbering system

Dr Rahul Tripathi (BDS,MDS in Prosthodontics and Implantology)
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Teeth are arranged in the jaws forming two dental arches :
Mandibular Arch(Lower Arch)
Maxillary Arch(Upper Arch)
Each arch divided by an imaginary midline into a right and left half called - QUADRANTS
Mandibular right/left quadrants
Maxillary right/left quadrants
Humans have two sets of teeth in their lifetime Permanent teeth- 32, Deciduous teeth- 20
DENTAL FORMULA
Dental Formula For Primary/Deciduous Teeth: I2/2 C1/1 M2/2 = 10
Dental Formula For Permanent Teeth I2/2 C1/1 P2/2 M3/3 = 16
WHY DO WE NEED ??
System used by dentists to associate information to a specific tooth
To do so efficiently, it is necessary to adopt a type of code or numbering system for teeth
In clinical practice some “shorthand” system of tooth notation is necessary for recording data.
There are several numbering systems exists in the world and THREE MAIN types of numbering systems are commonly used
1.) Universal Tooth Numbering System
2.) Zsigmondy And Palmar Tooth Numbering System
3.) FDI Tooth Numbering System