Abstract: The invention relates to a system for securing a dental prosthesis, characterized in that it has at least one anchorage (1) in the form of a screw which is anchored in a single bone a distance from the maxillary alveolar ridge, and a plate (3) arranged in the oral cavity (2), under the mucosa that covers the jaw bone (4), in contact with said jaw bone (4), and following the shape thereof and of the mucosa, with an extension (5) whereby the plate (3) is connected to the anchorage, said connection being completely covered by the mucosa and being a distance from the maxillary alveolar ridge (1). There are also posts (6) in the plate (3) configured for going through the mucosa so as to secure the dental prosthesis. The loads resulting from the use of the dental prosthesis are thus transmitted to the anchorage (1) through the plate and posts (3).