Introduction. Class II / 1 malocclusion is a quantitative and directional growth disorder, produced at the jaw or dental level, whose essential characteristics are: insufficient development in the transverse plane (mono or bimaxillary, symmetric or asymmetric), distalized occlusion type, sagittal inocclusion with a normo, hyper or hypodivergent facial pattern, associated with functional and aesthetic disorders.  Aim of the study. Studying and evaluating etiology aspects, diagnostic methods such as photostatic exam, digital cephalometrics and biometric study of models in dento-maxillary abnormalities Class II / 1 Angle.  Materials and methods. The basic material for the research performance is the result of the biometric analysis and model study according to the methods proposed by Pont, Korkhaus, Nance, Linder Hart, Bolton, where eight patients with class II / 1 Angle malocclusion were analyzed.  Results. The analysis of Pont's modeling models, Linder Hart, determined that in the class II / 1 Angle abnormalities, both jaws suffered transversal shortage. At the premolar (at the maxillary: Pont -100% Linder Hart -80%, mandible: Pont -80% Linder Hart -33.33%), at the molar level (at the maxilla: Pont and Linder Hart -93.33% at the jaw: Pont -60% Linder Hart -33.33%) Nance lists both excess space in 60% and 40% deficit which demonstrates the variety of class II / 1 Angle malocclusion. The Korkhaus analysis found elongation of the anterior maxillary sector in 66.67%. Conclusions. Class II malocclusion Angle is one of the most common and difficult to treat anomaly compared to others because of a wide variety, and the interaction between different etiological factors.