Implants for fixed and removable prostheses

For those individuals whose oral anatomy contraindicates the use of endosteal implants, there still remains a viable alternative to conventional removable dentures. Both maxillary and mandibular implant dentures of a subperiosteal design will provide a stable implant and a retentive restorative prosthesis. The patient is free from the oral gymnastics required to manipulate such appliances and in the maxilla the dentist is able to eliminate all palatal coverage without compromising the retention of the bridge. The lower subperiosteal implant and the pterygoid extension implant discussed both obtain their stability from accurate fit of the implant substructure to the bone. The implant first becomes more retentive when the periosteum tenaciously reattaches itself to the bone and in turn secures the implant in position (Fig. 13). The restorative procedures follow sound prosthetic prinicples with particular attention on avoiding any impingement of the underlying tissue areas. Implant dentures have truly provided patients a means of exploring alternative treatment modalities other than conventional removable dentures. Literally thousands of patients today are living testimony to the accomplishments of oral implantology when pursued as an exacting science prescribed by colleagues experienced in this revolutionary dental discipline.