The present study reviewed gross anatomic features and functions of incisor, canine, premolar and molar teeth of horses. Eruption and shedding times of deciduous, eruption times of permanent teeth, and development of various wear related macroscopic features on incisor teeth have been evaluated in detail. Thus, the reliability of these features to estimate a horse age is discussed under the light of recently published paper on this particular area. In addition, the present authors have noted the results of their examinations on the different macroscopic features of the teeth of 38 horses in related subjects.