Orthopaedic implant and system
The present invention relates to an orthopaedic implant and system for fixation of bones and a method for the use of the orthopaedic implant and system. The orthopaedic system finds utility for fixation of bones such as fractures of the tibia, although it may be used in any suitable long bone.
1 . An orthopaedic implant, comprising:
(a) a body for connecting to an intramedullary nail, the body having proximal and distal ends, the proximal and distal ends defining a first longitudinal axis therebetween;
(b) a first aperture at the proximal end of the body for receiving an interlocking screw; and
(c) securing means at the distal end of the body for securing the orthopaedic implant to the intramedullary nail:
wherein the first aperture substantially perpendicularly intersects the first longitudinal axis;
wherein the first aperture is a transverse aperture, which is substantially oblong in shape;
wherein the first aperture comprises first and second openings on the body of the orthopaedic implant, wherein the first and second openings define a longitudinal space therebetween on the surface of the body of the orthopaedic implant, wherein the longitudinal space between the first and second openings on the surface of the body of the orthopaedic implant defines a top section opposing a bottom section, wherein the top section is substantially parallel to the bottom section, and wherein a left section is located between the top section and bottom section opposing a right section, wherein the left section is substantially parallel to the right section; and
wherein the orthopaedic implant comprises a series of slits on the bottom section of the body, which are at least 0.05 mm apart, to form a series of deformable leaf layers comprising first, second and subsequent leaf layers.
2 . The orthopaedic implant according to claim 1 wherein the securing means are located at or adjacent the distal end of the top section.
3 . The orthopaedic implant according to claim 1 wherein the securing means is a groove.
4 . The orthopaedic implant according to claim 1 , further comprising at least one slit on the body, the or each slit positioned distally to the first aperture and proximally to the securing means.
5 . The orthopaedic implant according to claim 1 , further comprising at least one transverse slit on the body, the or each slit positioned on or at the bottom section, distally to the first aperture and proximally to the securing means, wherein the at least one slit extends transversely to the first longitudinal axis from the surface of the orthopaedic implant at or within the bottom section and further extends parallel to the first longitudinal axis, the or each slit opening at or within at least one of the left and right sections.
6 . The orthopaedic implant according to claim 1 , wherein the orthopaedic implant comprises a series of slits on the body, each pair of slits defining a series of deformable leaf layers comprising at least first, second and subsequent leaf layers, wherein each of the first, second and subsequent leaf layers comprise a first, second and actuating position.
7 . The orthopaedic implant according to claim 6 , wherein, in the first position, there is no engagement between leaf layers; in the second position, there is engagement between leaf layers when a first force is applied, which deforms a leaf layer from the first position to the second position; and, in the actuating position, there is engagement between leaf layers and movement of first, second and/or subsequent leaf layers when a second force is applied, which deforms a leaf layer from the second position to the actuating position.
8 . The orthopaedic implant according to claim 1 wherein the orthopaedic implant is a strut.
9 . An orthopaedic system for the fixation of bones comprising:
(a) an orthopaedic implant according to claim 1 ;
(b) an intramedullary nail for receiving the orthopaedic implant comprising a second aperture and defining a second longitudinal axis; and
(c) locking means at the proximal end of the intramedullary nail for locking the orthopaedic implant to the intramedullary nail.
10 . The orthopaedic system according to claim 9 , wherein the second aperture is a transverse aperture intersecting the second longitudinal axis, which is positioned at the proximal end of the intramedullary nail.
11 . The orthopaedic system according to claim 9 , wherein the second aperture is a transverse aperture shaped and dimensioned to receive the orthopaedic implant.
12 . The orthopaedic system according to claim 9 , wherein the orthopaedic implant is positioned in the second aperture and the securing means on the body the orthopaedic implant is aligned with second longitudinal axis.
13 . The orthopaedic system according to claim 9 , wherein the intramedullary nail comprises an inner threaded surface.
14 . The orthopaedic system according to claim 13 , wherein the locking means is threadably mountable to the inner threaded surface of the intramedullary nail at the proximal end, wherein rotation of the locking means causes the locking means to advance distally along the second longitudinal axis and engage with the securing means, thereby locking the orthopaedic implant.
15 . The orthopaedic system according to claim 9 , wherein the second aperture is positioned between 0-150° relative to the second longitudinal axis.
16 . The orthopaedic system according to claim 9 , wherein the intramedullary nail further comprises a third aperture, which is a transverse aperture intersecting the second longitudinal axis, and which is substantially oblong in shape.
17 . The orthopaedic system according to claim 9 , wherein the intramedullary nail further comprises a fourth aperture, which is a transverse aperture intersecting the second longitudinal axis, and which is substantially oblong in shape.
18 . The method for fixation of long bones, the method comprising the steps of:
(a) reducing the fracture;
(b) providing a channel for an intramedullary nail;
(c) inserting an intramedullary nail in the channel;
(d) providing a channel for an orthopaedic implant and
(e) inserting an orthopaedic implant according to claim 1 in the channel.
19 . The method according to claim 18 , wherein the fixing step comprises locking the orthopaedic implant through a transverse aperture in the intramedullary nail, through the proximal end of the intramedullary nail until engagement with the securing means on the orthopaedic implant.