Breast implant system for implantation in the body of a patient to form part of a breast implant (10), comprising at least a first element (1) and at least a second element (2 ), each of whose first and second elements comprises an outer wall that defines a volume that is filled or can be filled with a filling material or one or both of said first and second elements is provided in granular form, in which the The first element is movable with respect to the second element, allowing the first element to move, when implanted in the patient's chest, between the different places within the patient's breast in order to change the external shape of the breast implant (10 ), in which the first and second elements form part of a common casing (12, 13), the at least one first element (1) being movable between the different places within the casing, in which at least one, from the outer wall of the first element or (1) and the outer wall of the housing is flexible, characterized in that - at least a first element (1) and at least a second element (2), are interconnected in order to allow the exchange of content between them and further comprising at least one tank (7) in fluid connection with both the first element and the second element, so that the fluid can be exchanged between said tank and the first and second elements, in order to change their respective content ； or - further comprising at least one reservoir (R1, R2) in fluid connection with the at least one first element so that fluid can be exchanged from the reservoir to the first element and vice versa.Sistema de implante de mama para la implantación en el cuerpo de un paciente a fin de formar parte de un implante de mama (10), que comprende, al menos, un primer elemento (1) y, al menos, un segundo elemento (2), cada uno de cuyos primer y segundo elementos comprende una pared exterior que define un volumen que se rellena o se puede rellenar con un material de relleno o estando previsto uno o ambos de dichos primer
