Implant suitable for calcaneal osteotomy
View Patent ↗An implant comprises an elongated plate having a first major face and at least one locking screw hole, to receive a locking fastener oriented normal to the major face. The elongated plate has a wall with a flat surface normal to the first major face. A non-locking screw hole is located between the locking screw hole and the wall. The non-locking screw hole is configured to receive a non-locking fastener oriented at an acute angle relative to the locking fastener.
1. An implant, comprising:
an elongated plate formed of a single piece of material having a first major face and at least one locking screw hole, to receive a locking fastener oriented normal to the major face,
the elongated plate having a wall having a single flat surface normal to the first major face and extending over an entirety of the wall, the flat surface facing away from the at least one locking screw hole, the flat surface free of protrusions,
the wall having a concave fillet located interior to a right angle between the flat surface and the first major face, the concave fillet facing away from the first major face and the flat surface, the concave fillet having a non-locking screw hole between the locking screw hole and the wall, the non-locking screw hole configured to receive a non-locking fastener oriented at an acute angle relative to the locking fastener; and
at least one insertion member extending beyond the wall in an anterior direction, away from the elongated plate, the at least one insertion member having a planar surface continuous and coplanar with the first major face, the at least one insertion member having an edge with barbs, the insertion member configured to be completely inserted into a cut bone, with the entire flat surface contacting a cut surface of the cut bone.
2. The implant of claim 1 , wherein each barb has an anterior edge and a posterior edge, the anterior edge having a first angle relative to a longitudinal axis of the implant, the posterior edge having a second angle relative to the longitudinal axis, the first angle being smaller than the second angle.
3. The implant of claim 1 , wherein the at least one insertion member has a plurality of edges, each of the plurality of edges having barbs.
4. The implant of claim 1 , wherein the at least one insertion member includes two insertion members, with a slot therebetween.
5. The implant of claim 4 , wherein each of the two insertion members has the respective edge with barbs thereof facing outwardly, away from an axis of symmetry of the implant.
6. The implant of claim 5 , wherein each of the two insertion members further includes a respective face with barbs extending upwardly, away from a plane containing the first major face of the implant.
7. The implant of claim 1 , wherein:
the single flat surface extends from a medial edge of the wall to a lateral edge of the wall,
the at least one insertion member has a flat side coplanar with the first major face of the elongated plate, and
the insertion member has at least one ridge on a top surface opposite the flat side.
8. The implant of claim 7 , wherein each barb has an anterior edge and a posterior edge, the anterior edge having a first angle relative to a longitudinal axis of the implant, the posterior edge having a second angle relative to the longitudinal axis, the first angle being smaller than the second angle.
9. The implant of claim 8 , wherein the at least one insertion member has a plurality of edges, each of the plurality of edges having barbs.
10. The implant of claim 8 , wherein the at least one insertion member includes two insertion members, with a slot therebetween.
11. The implant of claim 10 , wherein each of the two insertion members has the respective edge with barbs thereof facing outwardly, away from an axis of symmetry of the implant.
12. The implant of claim 11 , wherein each of the two insertion members further includes a respective face with barbs facing upwardly, away from a plane containing the first major face of the implant.