[The craniofacial architectural factors predisposing to a skeletal Class II identified by Jean Delaire's architectural analysis].

The current state-of-the-art medical practice involves considering treatment both in terms of symptomatology and etiology. In the case of dento-facial deformities, treatment and prognosis must deal both with constitutional and functional anomalies. Most accurate diagnosis can be achieved using Jean Delaire's architectural cephalometric analysis. We illustrate the usefulness of this system using examples of class II skeletal malocclusions. Class II cranial malocclusion factors appear to be difficult to treat successfully. Maxillary and mandibular functional and constitutional anomalies are described. Functional deformities such as anterior rotation of the maxilla or posterior rotation of the mandibular ramus, can be successfully treated with early orthopedic care. Constitutional anomalies, such as excess length of the premaxilla or maxillary vertical excess, should frequently be treated in a combined orthodontic-surgical sequence as orthopedic care alone is ineffective. This explains the usefulness of Jean Delaire's architectural approach to obtain stable results in the treatment of maxillo-mandibular deformities.