[Tooth-size discrepancy: a clinical necessity].

INTRODUCTION: The subject of this article is the discovery of dento-dental disharmony (DDD) at the end of treatment. Lack of diagnosis is the source of this type of disappointment. MATERIAL AND METHOD: The diagnosis of DDD is not easily accessible on clinical examination and the compensations it generates mask it, especially if it is associated with other dysmorphoses. The use of indices, the best-known of which is Bolton's, enables diagnosis with the setup, a pre-treatment model which also has many other prognostic interests. RESULTS: Once DDD has been considered, it can be resolved by adapting dental volumes, either by subtraction or addition. CONCLUSION: Advances in computerized diagnosis with artificial intelligence are opening up new avenues for the systematic diagnosis of DDD.