Figure 6. The analysis of keywords in publications on tooth agenesis. (A) The map of keyword co-occurrence network. The words were divided into four clusters with different colors: clinical characterization (red), basic research (green), clinical management of tooth agenesis (blue), and syndromic tooth agenesis (orange). The size of the node reflected the frequency of occurrence. (B) Visualization of the average time of keyword occurrence. Lighter color indicates a later appearance.