System for predicting a future dental situation for a patient, called "current patient", including: - a computer database, in which data, called "historical data", are recorded, the historical data being relative to more than 1000 past dental situations, called "previous dental situations", each experienced, at a time point called "previous time point", by a patient called "previous patient", all the historical data relative to a previous dental situation including at least: - said previous time point; - values of context parameters at said previous time point, the context parameters including tooth positioning parameters of said previous patient; and - means for acquiring data with a view to performance of the following step: acquiring at a time point, called "current time point" (t a), data relative to a dental situation experienced by said current patient, called "current dental situation", all the data relative to said current dental situation, called "current data", including at least: - said current time point (t a); - values of context parameters (x a) at said current time point (t a), the context parameters (x a) including tooth positioning parameters of said current patient; - a computer program comprising instructions that, when the program is executed by a computer, lead the latter to implement the following steps: i) constructing, by statistical analysis, from said historical data, a predictive model making it possible to perceive how the value of parameters (x) will evolve according to input data; ii) predicting, depending on the current data, at least one future dental situation (x f) at at least one future time point (t f), the values of the tooth positioning parameters (x a) of the current patient at the current time point (t a) being said input data; and iii) presenting a difference (Δx) between said future dental situation (x f) and a prediction of a dental situation, for said future time point (t f), anticipated at a time point (to) prior to the current time point (t a), a dental situation being a situation relative to the position of the teeth, in order to allow an analysis of the results obtained in said steps above and, depending on said future dental situation, an evaluation of the benefit of an orthodontic treatment or, if the current patient has an orthodontic appliance, called "current orthodontic appliance", a reevaluation of the orthodontic treatment of said current patient and, depending on said reevaluation, a modification of the orthodontic treatment of the current patient. - a computer database, in which data, called "historical data", are recorded, the historical data being relative to more than 1000 past dental situations, called "previous dental situations", each experienced, at a time point called "previous time point", by a patient called "previous patient", all the historical data relative to a previous dental situation including at least: - said previous time point; - values of context parameters at said previous time point, the context parameters including tooth positioning parameters of said previous patient; and - said previous time point; - values of context parameters at said previous time point, the context parameters including tooth positioning parameters of said previous patient; and - means for acquiring data with a view to performance of the following step: acquiring at a time point, called "current time point" (t a), data relative to a dental situation experienced by said current patient, called "current dental situation", all the data relative to said current dental situation, called "current data", including at least: - said current time point (t a); - values of context parameters (x a) at said current time point (t a), the context parameters (x a) including tooth positioning parameters of said current patient; - said current time point (t a); - values of context parameters (x a) at said current time point (t a), the context parameters (x a) including tooth positioning parameters of said current patient; - a computer program comprising instructions that, when the program is executed by a computer, lead the latter to implement the following steps: i) constructing, by statistical analysis, from said historical data, a predictive model making it possible to perceive how the value of parameters (x) will evolve according to input data; ii) predicting, depending on the current data, at least one future dental situation (x f) at at least one future time point (t f), the values of the tooth positioning parameters (x a) of the current patient at the current time point (t a) being said input data; and iii) presenting a difference (Δx) between said future dental situation (x f) and a prediction of a dental situation, for said future time point (t f), anticipated at a time point (to) prior to the current time point (t a), a dental situation being a situation relative to the position of the teeth, i) constructing, by statistical analysis, from said historical data, a predictive model making it possible to perceive how the value of parameters (x) will evolve according to input data; ii) predicting, depending on the current data, at least one future dental situation (x f) at at least one future time point (t f), the values of the tooth positioning parameters (x a) of the current patient at the current time point (t a) being said input data; and iii) presenting a difference (Δx) between said future dental situation (x f) and a prediction of a dental situation, for said future time point (t f), anticipated at a time point (to) prior to the current time point (t a), a dental situation being a situation relative to the position of the teeth,