Introduction: Orthodontists have long tried to predict future growth. It is one of the most difficult goals to achieve precisely despite the different methods of growth forecasting. A simple technique based on clinical and radiological analyses of the nose and premaxilla makes it possible, using no measurements, to accurately predict future maxillary growth and to deduce the therapeutic indications. A morphologic study of the nose is also an important item in the diagnosis of cranio-facial syndromes. Materials and Methods: Combining detailed semiologic and radiologic studies of the nasal and premaxillary structures, this article proposes a method for evaluating and predicting facial growth. Results: Experience based on many observations and current embryological knowledg can detect growth abnormalities of the ethmoïdo-nasal-premaxillary unit and provide valuable therapeutic information. Discussion: Combining clinical and radiologic analyses of nasal and premaxillary morphology is a good method to predict growth of the upper face. It is also an important feature in the diagnosis of cranio-facial syndromes. Conclusion: This technique should be included in the diagnosis of maxillo-dento-facial orthopedic cases.