Provided are: dentures that provide a superior fit to a denture wearer and a comfortable biting feeling during meals； and a mounting attachment 2 for the dentures, said mounting attachment 2 comprising metal crowns 630, 740 that cover abutments, and ridge protrusion parts 633, 743 comprising a magnetic material and being provided at the periphery of the metal crowns 630, 740. Dentures 60, 70 for middle missing teeth are provided with ridge sliding engagement parts 530a, 540a that are mounted on the abutments on both sides, and magnets 570, 580 near the ridge sliding engagement parts. A stopper part for the ridge protrusion parts are provided to the upper side of the ridge sliding engagement parts, and the ridge protrusion parts are able to slide inside the ridge sliding engagement parts such that the dentures for middle missing teeth are retained by a magnetic pulling force between two abutments while being able to move in parallel by a prescribed amount with respect to the two abutments. Moreover, on the ridge sliding engagement parts, denture tip-side groove ends, which serve as stopper parts of ridge sliding grooves, collide with the upper-side ends of the ridge protrusion parts, resulting in the dentures for missing teeth mounting on the two abutments.L'invention concerne : des prothèses dentaires qui fournissent un ajustement supérieur à un porteur de prothèses dentaires et une sensation de morsure confortable pendant les repas ； et une fixation de montage (2) destinée aux prothèses dentaires, ladite fixation de montage (2) comprenant des couronnes métalliques (630, 740) qui recouvrent des butées, et des parties de saillie de crête (633, 743) comprenant un matériau aimanté et étant disposées à la périphérie des couronnes métalliques (630, 740). Des prothèses dentaires (60, 70) destinées aux dents manquantes du milieu sont pourvues de parties de mise en prise coulissantes de crête (530a, 540a) qui sont montées sur les butées sur les deux côtés, et des aimants (5
