An implant-supported dental prosthesis, comprising intermediate pieces for fixing the prosthesis (g) to implants arranged in the gum of a user, wherein the dental prosthesis at least comprises:
- a compartment (1) housed inside the prosthesis and provided with a side opening (1a) arranged in correspondence with an opening (28) of the prosthesis (g) for communicating the compartment (1) with the outside of the prosthesis,
- a spacing member (2) included in the compartment (1) that can be actuated through the side opening (1a) and arranged proximal to an implant, that comprises two arms (2a) articulated on a shaft (2b),
- where the spacing member (2) moves when it is actuated by a tool pressing the spacing member against the implant causing the separation of the prosthesis (g) from said implant.