[Original endosseous implant therapy to resolve the problem of posterior unilateral or bilateral edentulousness of the upper jaw].

An increased pneumatization of the maxillary sinus and an important alveolar crest resorption usually means a contra-indication to any endosteal implantation unless a grafting of the maxillary sinus is attempted. As early as 1986, a scanner analysis was performed over 200 patients to scrutinize a new anatomical approach of the tubero-pterygoid junction. The maxillary bone, especially the tuberosity is extremely spongious and fragile. On the other side the tubero-pterygoid junction at the boundary of the palatal bone and the two pterygoid wings presents a limited site but essentially cortical, very secure to assure the primary stability of a Brånemark implant. The scanner X-ray enhances the tubero-pterygoid junction and allows to reposition it in the three planes. It mainly consists of superimpositions of computerized coronal and axial tomographs. The scanner computer is providing the right pathway from the tuberosity to the pterygoid process.