[Architectural analysis of vertical dimension]

Laude and the Lille orthodontic department describe the trigeminal nerve as the main architect of the face. Using the points where it emerges into the cranium, the authors propose an analysis, which they base on four concepts: --the stability of the pterygoid base, --the interaction between two activities, prehensile and masticatory, of the oral cavity, --the cranio-mandibular entity, --the importance of the paired fifth cranial nerve. This study deals with vertical dimension of both alveolar and basal bone, as well as global, ramal, and maxillary growth directions, which they conceptualize as three parallel, convergent, or divergent lines. This analysis can be carried out quickly and easily because it requires only four simple measurements.