A cannula (1) comprising A) a central axis (2), a front end (3), a rear end (4) and a channel (5) coaxial or parallel to said central axis (2) and defining a peripheral wall (12) of said cannula (1) B) referencing means (15) at said rear end (4), so that said cannula (1) can be brought in a desired position relative to a cavity (120) in a bone wherein C) said cannula (1) further comprises at least two perforations (8) penetrating said peripheral wall (12) transversely to said central axis (2) and D) said at least two perforations (8) are arranged in a portion (16) of said peripheral wall (12) which extends over an arc (18) orthogonal to said central axis (2) with a central angle α<270°. A method for applying bone cement into a bone structure comprising the steps of: A) selecting at least one region in a bone where the trabecular bone structure is to be augmented B) producing at least one cavity (120) communicating with said at least one bone region C) applying a fluid jet lavage towards said at least one bone region, and D) providing bone cement to said at least one bone region.
