Abstract: Objective：To design a new tooth notation system to record teeth efficiently with computer for electronic patient records, electronic communication and electronic publications. Methods：T and t were considered as identification characters of teeth to be recorded. T represented permanent teeth and t represented deciduous teeth. From the midline posteriorly digits 1～8 and digits 1～5 represented the names of permanent teeth and deciduous teeth respectively. The assigned digits were written as superscript and subscript on right and left sides of characters. Results：The location and name of tooth in the dentitions can be recorded accurately by writing the assigned digit as superscript or subscript on right or left side of character. Conclusions：Teeth can be denoted by superscript-subscript tooth notation system conveniently and accurately.