摘要:
The invention relates to a device for a surgical navigation system, for defining the position of a straight line determined by the operator within a three-dimensional system of coordinates, in a area being operated on. The device comprises a body (1) with a surface (2) and at least three markers (3) which emit waves (19). The position of said markers within the three-dimensional system of coordinates can be determined by a position-detecting device belonging to the surgical navigation system. A laser (4) mounted on said body (1) emits a laser beam (5) directed away from the body (1), this laser beam having a geometrical central beam (6) and a wave length in the visible range. The laser beam is emitted in a geometrically defined position in relation to the markers (3) so that the position of the central beam (6) in relation to the three-dimensional system of coordinates can be calculated from the measured position of said markers (3) by a computer also belonging to the surgical navigation system.
摘要:
The bone plate of longitudinal shape has an upper surface (1), a curved lower surface (2) for contacting a bone, a plurality of conical through holes (3) connecting the upper surface (1) with the lower surface (2) for receiving bone screws, a central longitudinal axis (4) and consists of a resorbable material. The curved lower surface (2) has a radius of curvature R which is smaller than 10 mm. The ratio F/d of the total area F of the upper surface (1) including the surface area of the through holes (3) to the thickness d of the plate is in the range of 190 to 270 mm. The central part of the longitudinal plate has a generally constant width B whereas the width of the free ends of the longitudinal plate is narrowing to value b
摘要:
The invention relates to forceps (1) for grasping bones or bone fragments comprising two forcep levers (2; 3) which can pivot in relation to one another. Said forcep levers have clamping tips (7; 8) which are located on the ends (9; 10) of the forcep levers (2; 3) appointed for grasping a bone. The forceps (1) also comprise a fixing means (6) for fixing the relative distance of the forcep levers (2; 3) from one another in a manner which can be loosened. The forceps have a connecting pin (11) with which another element can be connected inside a repositioning device. The fixing means (6) is arranged at a distance y from the axis of rotation (5), and the longitudinal axis (12) of the connecting pin (11) lies in the pivoting plane of the forcep levers (2; 3). The device for the external fixation of bone fractures comprises at least one pair of repositioning forceps (1) and one longitudinal support. The device also comprises at least one clamping element (19) which detachably connects the connecting pin (11) of the repositioning forceps (1) and the at least one longitudinal support (18) such that they can rotate in relation to one another.
摘要:
The method for the determination of reduction parameters comprises: A) measuring points on the surfaces of the corresponding bones of interest at the patient's left and right side of the body; B) establishing a plane of symmetry containing an anterior-posterior axis and a proximal-distal axis; C) a mirror image of the patient's non-fractured bone is generated symmetrically to the plane of symmetry; and D) the reduction parameters are then determined by comparison of the coordinates of the points at the fractured bone with the coordinates of the points within the mirror image. The device according to the invention comprises: A) a cylindric or prismatic reference bar; B) clamps displaceable on and fastenable to the reference bar; C) screws or pins screwable into the bone transversely to the reference bar within the clamps; and D) an adjustable clamp to fasten a pin capable of being set with its tip to desired points on the surface of the bone.
摘要:
The invention relates to an osteosynthesis implant (1) that preferably consists of a bioresorbable plastic material. The inventive implant receives the longitudinal fixation elements (10) to be anchored in the bone, especially in the form of wires, nails, pins or screws. The openings destined to receive the fixation elements (10) do not completely extend through the implant (1) like in conventional bone plates or intramedullary nails but are degenerated to indents (2) in the surface of the implant (1) so that they may serve as a guide for the fixation elements (10) to be guided through the implant (1). The inventive implant (1) allows insertion of the fixation elements (10) in the bone t diverging angles and crossing one another, so that the fixation elements (10) extending intramedullarly or in the spongiosa are primarily prevented from migrating in a proximal or distal direction.
摘要:
The bone plate of longitudinal shape has an upper surface (1), a curved lower surface (2) for contacting a bone, a plurality of conical through holes (3) connecting the upper surface (1) with the lower surface (2) for receiving bone screws, a central longitudinal axis (4) and consists of a resorbable material. The curved lower surface (2) has a radius of curvature R which is smaller than 10 mm. The ratio F/d of the total area F of the upper surface (1) including the surface area of the through holes (3) to the thickness d of the plate is in the range of 190 to 270 mm. The central part of the longitudinal plate has a generally constant width B whereas the width of the free ends of the longitudinal plate is narrowing to value b
摘要:
The method for the determination of reduction parameters comprises: A) measuring points on the surfaces of the corresponding bones of interest at the patient's left and right side of the body; B) establishing a plane of symmetry containing an anterior-posterior axis and a proximal-distal axis; C) a mirror image of the patient's non-fractured bone is generated symmetrically to the plane of symmetry; and D) the reduction parameters are then determined by comparison of the coordinates of the points at the fractured bone with the coordinates of the points within the mirror image. The device according to the invention comprises: A) a cylindric or prismatic reference bar; B) clamps displaceable on and fastenable to the reference bar; C) screws or pins screwable into the bone transversely to the reference bar within the clamps; and D) an adjustable clamp to fasten a pin capable of being set with its tip to desired points on the surface of the bone.
摘要:
The bone plate (1) proposed has several conical holes which taper towards the surface (2) in contact with the bone and two screws (4) designed to anchor the plate (1) in place. Each of the screws (4) has a conical head (5), with a patterned curved surface, shaped to fit into the conical holes (3) in the plate, plus a threaded shank (6) designed to anchor the screw in the bone. The patterned curved surface of the screw head is harder than the material of which the plate (1) is made in the vicinity of the holes (3).
摘要:
The bone augmentation device is used for attachment of soft tissues to bone by means of sutures. It comprises a curved bone plate (1) with several through holes (2). The bone plate (1) lies in a curved plane (3) having a curvature RPL in the range of 25 to 100 mm. The edges (4) of the plate (1) are rounded with a curvature REP in the range of 0,2 to 0,7 mm and the edges (5) of the through holes (2) are rounded with a curvature REH in the range of 0,2 to 0,8 mm. The device according to the invention prevents the suture from cutting through the bone and prevents gapping between the soft tissue (tendon) and bone which would result in a poor healing. The consequence is that a stable repair will facilitate healing.
摘要:
The invention relates to a surgical guide body (1) which is designed to receive longitudinal fixation elements (10) such as wires, nails, pegs or screws which are to fixed to the bones. The inventive guide body comprises an upper side (3), a lower side (4) and at least three openings (2) connecting the upper side (3) to the lower side (4) of said guiding body. The centre point of said openings is not located on a straight line. The central axes (5) of at least two of the openings are skewed in relation to each other. The guide body (1) enables the fixation elements (10) to be inserted at various intersecting angles. The guide body (1) primarily prevents movement both towards the proximal and distal parts of the fixation elements (10) which extend within the spongiosa or intramedullar region.