摘要:
A solid lubricant for use in a medical device for lubrication of a synovial joint. The solid lubricant comprising at least one of a high-molecular weight hyaluronic acid, a crosslinked high-molecular weight hyaluronic acid, and a hyaluronic acid of at least two different high-molecular weights, crosslinked to form a semisolid gel.
摘要:
A medical device system for implantation in a hip joint, for providing at least one artificial hip joint surface for a patient. The medical system comprises an artificial caput femur surface (45) and an artificial acetabulum surface (65). The artificial acetabulum surface comprises a largest cross-sectional distance that is variable such that the partly bowl-shaped artificial acetabulum surface can be inserted through a hole in the pelvic bone, from the abdominal side of the pelvic bone, the hole having a diameter smaller than said largest cross-sectional distance; and a functional opening adapted to be directed towards the artificial caput femur surface, when implanted in the patient, the functional opening having a size adapted to be variable such that it is smaller than the largest diameter of the artificial caput femur surface, when implanted, such that the artificial acetabulum clasps the surface of the artificial caput femur surface.
摘要:
A medical device for implantation in a hip joint of a patient, the medical device comprising a prosthetic replacement for the acetabulum. The prosthetic replacement for the acetabulum comprises a first part (1841) adapted to be fixated to the femoral bone of the patient; and a second part (1842) rotatably connected to the first part by means of a connecting member (1843). The first part comprises a bowl-shaped inner contacting surface portion adapted to receive a bowl-shaped outer contacting surface portion of the second part such that the second part is rotatable, relative to the first part, around a point of rotation formed by the connecting member. The second part comprises a bowl-shaped inner surface adapted to receive a ball-shaped portion of a prosthetic replacement for the caput femur, adapted to be fixated to the pelvic bone, such that the prosthetic replacement for the caput femur and the second part form a ball joint in an opposite configuration. The inner contacting surface of the second part comprises an equator line (1821, 1845) being the largest circumference of the inner contacting surface, and at least one extending portion (1823a, 1823b) extending beyond the equator line and being adapted to clasp the ball-shaped portion of the prosthetic replacement for the caput femur.
摘要:
A medical device for treating hip joint osteoarthritis. The medical device comprising at least one artificial hip joint surface configured to replace a carrying surface of at least one of an acetabulum and a caput femur, and a first sealing member. The medical device is adapted to seal a hollow space together with at least one of: the acetabulum surface, an artificial acetabulum surface, the caput femur surface and an artificial caput femur surface. The medical device is further adapted to receive injected material into the sealed hollow space for creating an artificial hip joint surface.
摘要:
A medical device for implantation in a hip joint of a human patient. The natural hip joint having a ball shaped caput femur (5) as the proximal part of the femoral bone (7) with a convex hip joint surface towards the centre of the hip joint and a bowl shaped acetabulum (11) as part of the pelvic bone (9) with a concave hip joint surface towards the centre of the hip joint. The medical device comprises an artificial caput femur (112), comprising a convex surface towards the centre of the hip joint. The artificial convex caput femur is adapted to, when implanted be fixated to the pelvic bone of the human patient. The artificial convex caput femur is further adapted to be in movable connection with an artificial acetabulum surface (1340) fixated to the femoral bone of the patient, thereby forming a ball and socket joint. The medical device further comprises a fixation element (1311) adapted to engage the surface of the abdominal side of the pelvic bone, for fixating the medical device to the pelvic bone.
摘要:
A medical device system for implantation in a hip joint of a human patient. The medical device system comprises an artificial caput femur (45, 607) adapted to replace at least the surface of at least one of the caput femur and the acetabulum. The artificial caput femur comprises a positioning through hole (910), and a positioning shaft (900) adapted to be stabilized by and placed in at least one of the femoral bone and the pelvic bone. The positioning through hole of the artificial caput femur is adapted to surround the positioning shaft, for positioning the artificial caput femur in a desired position in the hip joint. The positioning shaft is adapted to be placed in the positioning through hole of the artificial caput femur and in a positioning hole of an artificial acetabulum, for positioning the artificial caput femur and artificial acetabulum in relation to the at least one of the femoral bone and the pelvic bone and for aligning the artificial caput femur in relation to the artificial acetabulum.
摘要:
The invention relates to a chirurgical instrument for removing distal and/or peripheral cement (2) and/or a medullary block in a medullary cavity (8) when replacing endoprotheses. Said instrument comprises a drilling tool (4) and an extraction tool (6). Said drilling tool (4) and said extraction tool (6) have a respective bore (14, 16) which is coaxial to the respective tool shaft (12) to receive a centering bolt (10). The bore diameter of the coaxial bores (14, 16) of the drilling tool (4) and of the extraction tool (6) is substantially adapted to the diameter of the centering bolt (10). The centering bolt (10) is anchored in a predetermined site in the cement (2) or medullary block and the medullary cavity (5) located distally below it serves to axially guide the drilling tool (4) or the extraction tool (6).
摘要:
A modular system for hybrid fixation of a joint prosthesis into a bone cavity includes a sleeve (12) having a bore (24) therethrough. The sleeve (12) is cementable within the bone cavity (50). A prosthetic component (10) is insertable into the bore (24) of the sleeve (12). The prosthetic component (10) is retained within the sleeve (12) and secured to the bone without cement.
摘要:
A method and apparatus for performing hip surgery utilize a preformed sleeve (30) formed of bone cement material and having apertures (33) which is positioned in the cavity. Fresh bone cement is injected under pressure to fill the femoral cavity including the apertures (33) and any spaces or voids between the preformed sleeve and the wall of the cavity. A femoral prosthesis (P) having a stem portion (24) is implanted therein. The interior wall of the sleeve (30) is larger than the stem exterior wall portion (24) encircled by the sleeve (30) such that fresh bone cement is between the interior wall of the sleeve (35) and the stem (24).