Abstract: An attachment system for securing to a mounting bar a denture having a plastic base formed with a groove. The system has a generally C-section plastic rider engaged over the bar, having an outer surface with a predetermined outside cross-wise dimension, and engaged in the groove. An elastically deformable liner element of a material substantially harder than the plastic of the rider and of the base is imbedded in the base and forms an inner surface of the groove engaging the outer surface of the rider. The liner element defines a mouth opening having an inside width slightly Smaller than the outside cross-wise dimension of the rider so that the rider can only move into and out of the groove with deformation of the rider and/or of the liner element.

Abstract: A dental coupling assembly for anchoring a prosthesis in the mouth in which a holding member has a recess defined by a straight right circular cylindrical wall and a closed bottom which confronts the outer right circular cylindrical wall of a plug member whose end receivable within the recess is likewise closed so that the plug member forms a displacement body for displacing a fluid adhesive throughout the cylindrical gap between the two members and between the bottom wall of the recess and the end surface of the plug. Because the walls are cylindrical and not undercut or tapered, the parts can be machined with greater precision and ease while allowing adjustment because of the adhesive field gap. The T-shaped slots and other lateral openings need not be provided.