A bone fixation device (1) comprises an elongated member (2) and a washer (3) assembled in a manner to prevent relative longitudinal displacement at the same time allowing axial rotation of the washer (3) with respect of the elongated member (2). The elongated member (2) comprises a proximal head (4) and an elongated shaft (5). The proximal head (4) comprises at least a distal spherical portion (8) having a diameter (D) and defining a maximum transversal dimension (Dh) of the proximal head (4). The washer (3) has a central cavity (14) configured to seat the proximal head (4) and comprising a central spherical portion (15) having the same diameter (D) of the distal spherical portion (8) of the proximal head (4). The central spherical portion (15) extends between a distal rim (16) and a proximal rim (17). The distal rim (16) has a distal transversal dimension (Dd) larger than a maximum transversal dimension (d) of the elongated shaft (5) and smaller than the maximum transversal dimension (Dh) of the proximal head (4). The proximal rim (17) has a proximal transversal dimension (Dw) larger than the maximum transversal dimension (d) of the elongated shaft (5) and slightly smaller than the maximum transversal dimension (Dw) of the proximal head (4). The proximal transversal dimension (Dw) of the proximal rim (17) is larger than the distal transversal dimension (Dd) of the distal rim (16). The proximal rim (17) is configured to be elastically deformable by pressing the proximal head (4) through the proximal rim (17).

The guidance and positioning device may be a system for creating a passage in tissue, positioning fasteners or other implants, and tensioning an elongated fastening member, like a suture, thread, wire, or pin. In some embodiments, the device may allow for the implantation of multiple sutures and fasteners in tissue. A fastener may be positioned at the distal end of a flexible pushrod. The fastener may be connected with the pushrod or may be loosely fitted with the distal end of the pushrod. A suture may be looped through or connected with the fastener such that one, two, or more sections, legs, strands, or portions of the suture extend from the fastener.

A closure for an open headed medical implant, such as a bone screw. The closure having a cylindrical body having an axis of rotation and also having a radially outer surface with a thread or other guide and advancement structure thereon. The body having a plurality of apertures that open onto a top surface of the body and that are parallel to but spaced from the axis of rotation. The closure also has a break-off head centrally attached by a neck to the top surface of the body.

Disclosed are bone screw assemblies and kits including the same. Also disclosed are methods for anchoring of bone parts using a bone screw, for example, in order to fix parts of a broken bone in a desired relative orientation. Embodiments of the bone screw assemblies include a screw with an enlarged screw head and a cap having an internal cavity in which the screw head is retained wherein the internal cavity and screw head are dimensioned to allow, during use, a limited movement of the screw head within the cavity including translation of the screw head in a direction parallel to the X-axis of the cap.

The guidance and positioning device may be a system for creating a passage in tissue, positioning fasteners or other implants, and tensioning an elongated fastening member, like a suture, thread, wire, or pin. In some embodiments, the device may allow for the implantation of multiple sutures and fasteners in tissue. A fastener may be positioned at the distal end of a flexible pushrod. The fastener may be connected with the pushrod or may be loosely fitted with the distal end of the pushrod. A suture may be looped through or connected with the fastener such that one, two, or more sections, legs, strands, or portions of the suture extend from the fastener.

Bone marrow access apparatus includes a bone penetrating member and a cap. The bone penetrating member includes a tubular insertion portion, and a head portion provided at a proximal end of the tubular insertion portion. A cross-sectional shape of the head portion is wider than a cross-sectional shape of the tubular insertion portion. A recess is provided in the head portion, and an internal channel is provided through the head portion and the tubular insertion portion. The cap accommodates the head portion of the bone penetrating member therein. The cap includes a lower wall which covers at least a part of a distal side of the head portion, and a projection which projects into the recess of the head portion.

A sterilizable disposable surgical instrument is formed by an implant for bone fusion as well as an implant sleeve surrounding the implant for bone fusion. The implant has a distal implant section, a proximal implant section, and a coupling section with a polygonal cross-section profile between the distal and proximal implant section. The implant sleeve has a protective cap and a handle, which can be connected to one another. A first bore is configured in the protective cap in the longitudinal direction and receives the proximal implant section of the implant. A second bore is configured in the handle running in the longitudinal direction and receives the distal implant section of the implant for bone fusion. A coupling region having a through-opening is configured in the second bore in the handle, into which the coupling section of the implant for bone fusion engages in an integral and force-locking manner.

A bone marrow access apparatus includes a bone penetrating member having an internal channel having an opening at a proximal end and an opening at a distal end, and a valve cap engaged with the bone penetrating member. The valve cap defines an interior cavity in which part of the bone penetrating member is situated to thereby secure the valve cap to the bone penetrating member. The valve cap includes a valve having an opening having an open state in which the channel is not obstructed and a closed state preventing flow of material through the channel. By being repeatedly switchable between the open and closed states, the valve controls access to the channel by bone marrow sampling and biopsy instruments.

A bone marrow access apparatus is adapted to be installed in connection with a bone. The bone marrow access apparatus includes a bone penetrating member having an internal channel having an opening at a proximal end and an opening at a distal end adapted to open into in a bone marrow space in the bone. A valve cap is provided around part of the bone penetrating member, and includes a valve having an opening having an open state in which the channel is not obstructed and a closed state to prevent flow of a material through the channel.

A bone marrow access apparatus includes a bone penetrating member having an internal channel having an opening at a proximal end and an opening at a distal end. A valve cap is engaged with the bone penetrating member, the valve cap defining an interior cavity in which part of the bone penetrating member is situated. The valve cap includes a valve having an opening having an open state in which the channel is not obstructed and a closed state to prevent flow of a material through the channel. The valve is repeatedly switchable between the open and closed states. The bone penetrating member has an upper surface and a seat which is below the upper surface, the seat being located at an interior of the bone penetrating member, and the seat being engageable with an installation or removal instrument.