Device for shaping and cutting a bone graft
A device for shaping and cutting a bone graft comprises a main body extending along a longitudinal axis from a lower end to an upper end and having inside it a housing for the insertion of the bone graft to be shaped, an upper opening located at the upper end for the insertion of the bone graft into the housing, a lower support designed to support the bone graft, and an upper surface defining a cutting plane placed at the upper end and containing said upper opening, wherein the cutting plane is inclined with respect to the longitudinal axis by an angle ranging between 90° and 30°, preferably between 90° and 60°.
1 . A kit for shaping and cutting a bone graft comprising a device comprising a lower support designed to support the bone graft and a plurality of main bodies, each main body extending along a longitudinal axis from a lower end to an upper end and having inside the main body a housing for insertion of the bone graft to be shaped, an upper opening defined by said upper end for the insertion of the bone graft into said housing, said upper end of the main body further comprising an upper surface defining a cutting plane, wherein the upper surface of each main body is inclined with respect to said longitudinal axis by an angle that is less than 90° and greater than or equal to 30°, the plurality of said main bodies are interchangeable, and the upper surface of each main body has an inclination that is different from other main bodies.
2 . The kit according to claim 1 , wherein each device comprises an engagement and adjustment body, which can be coupled to said main body, having an engagement portion, designed to receive in shape coupling the lower end of said main body, and a base portion, defining said lower support, mobile along said longitudinal axis.
3 . The kit according to claim 2 , wherein said base portion comprises a flange head, designed to receive in support said bone graft, connected to a threaded shank that can be screwed inside a threaded hole present in the engagement portion, and a gripping and handling element, connected to said threaded shank in a position opposite to said flange head, to rotate said base portion and cause it to shift vertically to adjust the position of the flange head inside the housing of the main body.
4 . The kit according to claim 3 , wherein said flange head comprises a central cavity, coaxial to said longitudinal axis, to receive in abutment a drilling tool for a central bore of the bone graft.
5 . The kit according to claim 2 , wherein said engagement and adjustment body comprises at least a first arm designed to guide the coupling between the main body and the engagement and adjustment body and to permanently lock the bone graft within the main body during a cutting step, by impressing a force orthogonal to the longitudinal axis on the bone graft.
6 . The kit according to claim 5 , wherein said engagement and adjustment body comprises at least a second arm designed to guide the coupling between the main body and the engagement and adjustment body.
7 . The kit according to claim 5 , wherein the main body comprises at least one window, on a side wall delimiting the housing of the bone graft, designed for the insertion of the first arm of said engagement and adjustment body.
8 . The kit according to claim 6 , wherein said main body comprises at least one groove, on a side wall delimiting the housing of the bone graft, designed to house the second arm of said engagement and adjustment body.
9 . The kit according to claim 5 , wherein it comprises a locking pin of said first arm, to lock said first arm in a clamping configuration wherein said first arm holds the bone graft in a predefined locking position to proceed with the cutting and prevent its shifting along the longitudinal axis.
10 . The kit according to claim 2 , wherein the kit comprises a centring and locking mechanism for correct coupling and locking between the main body and the engagement and adjustment body.
11 . The kit according to claim 10 , wherein said centring and locking mechanism comprises a ball push-button on the engagement and adjustment body, which can be engaged inside a hole realized on said main body.
12 . The kit according to claim 1 , wherein said main body defines at least one slit on a side wall delimiting the housing of the bone graft, the side wall adjacent the slit having a respective graduated scale designed to indicate a cutting height of the bone graft.
13 . The kit according to claim 12 , wherein said main body defines a second slit, opposite a first slit on the side wall delimiting the housing of the bone graft, the side wall adjacent the second slit having a respective graduated scale designed to indicate the cutting height of the bone graft.
14 . The kit according to claim 1 , wherein the upper surface is inclined with respect to said longitudinal axis by an angle that is less than 90° and greater than or equal to 60°.