Dental Formulas of Humans and Other Mammals: Classification according to their Evolution

Introduction a dental formula is a graphic representation that indicates the number of teeth that a certain species has. We suppose that mammals, and among them man, can have a different evolution in the number and distribution of teeth and this will be reflected in the dental formula. The objective of this work is to evaluate if this hypothesis is correct or not and to make a classification of the dental formulas according to their evolution. Methods a bibliographic review was made to know the permanent dental formulas in the most common mammals and with this the material was obtained. These were grouped into 4 tables taking into account the absence or not of incisors and canines and the type of feeding. Results they are in tables 1-4. Conclusions A- Dental agenesis may have a genetic cause, but they are within an evolutionary tendency of the dentition, which are a consequence of the change in eating habits. B- In the dental formulas of mammals there are three different evolutions I- Mammals without incisors. Herbivores. II- Mammals without canines. Rodents. III- Mammals with incisors and canines IIIa- Carnivores. IIIb- Omnivores and others. The human is in this group.