Abstract: Tooth wear was characterized by microscopic image in general cases. There was little work focusing on the numerical analysis of the morphology of tooth wear. In this work, white-light confocal profiler, Slarmap Universal and Tooth-Frax were employed for numerical analysis of tooth wear morphology to establish scale-sensitive fractal analysis curve. The results showed that there was a relationship between tooth wear morphology and scale-sensitive fractal analysis curve for further building digital signals. A main purpose of this work was to provide theoretical basis and technical support for developing tooth surface sensor to monitor tooth wear dynamically.