Prognosis is the prediction of the probable course of a disease. Assigning a prognosis to a particular tooth, offers critical information for the develop- ment of a treatment plan. The aim is to restore and/or maintain suitable conditions for dental function. Prognosis constitutes one of the most important decision functions in dentistry, and it will determine the success of the periodontal treatment.

The patient must know the condition of his/her teeth, in order to take part in the decisions, participate in take note of the difference and become moti- vated by the changes seen before and after the treatment. Prognosis establishes a projection during time, based on previous success and failures which have been properly, making this application a valuable experience.