The invention concerns a surgical implant (1) for correcting the mutual positioning or orientation of the bones of a patient designed to be inserted between at least two bone bodies (2, 3) of said patient, and comprising:a main body (5) extending along a longitudinal axis (X-X′),a plurality of fins (9), each fin (9) being provided with a junction edge (10) connecting said fin (9) to said main body (5), such that said fins (9) protrude from said main body (5) from the respective junction edge (10) thereof,the surgical implant (1) being characterized in that each fin (9) has a sufficient flexibility so that it can be deformed along a direction centripetal and/or parallel to the longitudinal axis (X-X′) under the action of at least one of the bone bodies (2, 3) when said surgical implant (1) is inserted between said bone bodies (2, 3).Surgical implants.