BONE PLATING SYSTEM
A bone plating system includes a plate member and a first bone screw. The plate member defines a longitudinal axis and has a top surface and a bottom surface. The plate member further defines an elongated hole extending between the top surface and the bottom surface with a width in a direction generally perpendicular to the elongated axis and a length with a greater dimension in a direction generally parallel to the elongated axis. The elongated hole is defined by a sidewall having a spherical cross section in the direction generally perpendicular to the elongated axis. The sidewall has a threading. The first bone screw has a threaded and spherical head for threadably engaging the elongated hole. The threading extends completely around the sidewall of the elongated hole such that the first bone screw may threadably engage the elongated hole anywhere along the length.
1 . A plating system for bone, the plating system comprising:
a plate member defining a longitudinal axis and having a top surface and a bottom surface, the plate member defining an elongated hole extending between the top surface and the bottom surface with a width in a direction generally perpendicular to the elongated axis and a length with a greater dimension in a direction generally parallel to the elongated axis, the elongated hole defined by a sidewall having a spherical cross section in the direction generally perpendicular to the elongated axis, the sidewall having a threading; and
a first bone screw having a threaded and spherical head for threadably engaging the elongated hole;
wherein the threading extends completely around the sidewall of the elongated hole such that the first bone screw may threadably engage the elongated hole anywhere along the length.
2 . The plating system for bone of claim 1 , wherein the threading of the elongated hole is a non-helical threading including at least one closed one ridge extending completely about the inner circumference in a single plane.
3 . The plating system for bone of claim 2 , wherein the non-helical threading includes a plurality of closed ridges extending completely about the inner circumference.
4 . The plating system for bone of claim 1 , wherein the first bone screw has a shaft defining a shaft axis and wherein the head of the first bone screw cooperates with the threading and the spherical cross section of the elongated hole for threaded engagement of the first bone screw with the plate at various angles of the shaft axis relative to the plate.
5 . The plating system for bone of claim 1 , wherein the non-helical threading of the elongated hole accommodates translation of the threaded head of the first bone screw along the length of the first bone screw for compression of a fracture.
6 . The plating system for bone of claim 1 , wherein the threaded head of the first bone screw includes a double lead.
7 . The plating system for bone of claim 2 , further comprising second bone screw having an unthreaded and spherical head for seating in the elongated hole and angulating relative to the plate member.
8 . The plating system for bone of claim 7 , wherein the head of the first bone screw is seated on a minor diameter of the elongated hole defined by the threading.
9 . The plating system for bone of claim 1 , wherein the elongated hole is helically threaded.
10 . A plating system for bone, the plating system comprising:
a plate member defining a longitudinal axis and having a top surface and a bottom surface, the plate member defining an elongated hole extending between the top surface and the bottom surface with a width in a direction generally perpendicular to the elongated axis and a length with a greater dimension in a direction generally parallel to the elongated axis, the elongated hole defined by a sidewall having a spherical cross section in the direction generally perpendicular to the elongated axis, the sidewall having a non-helical threading including at least one closed ridge extending completely about the inner circumference in a single plane;
a first bone screw having a threaded and spherical head for threadably engaging the elongated hole; and
a second bone screw having an unthreaded and spherical head for seating in the elongated hole;
wherein the non-helical threading extends completely around the sidewall of the elongated hole such that the first bone and second bone screws may interchangeably engage the elongated hole anywhere along the length and the non-helical threading of the elongated hole accommodates translation of the threaded head of the first bone screw along the length of the first bone screw for compression of a fracture.
11 . The plating system for bone of claim 10 , wherein the non-helical threading includes a plurality of closed ridges extending completely about the inner circumference.
12 . The plating system for bone of claim 10 , wherein the first bone screw has a shaft defining a shaft axis and wherein the head of the first bone screw cooperates with the non-helical threading and the spherical cross section of the elongated hole for threaded engagement of the first bone screw with the plate at various angles of the shaft axis relative to the plate.
13 . The plating system for bone of claim 10 , wherein the head of the first bone screw includes a double lead.
14 . The plating system for bone of claim 10 , wherein the head of the second bone screw is seated on a minor diameter of the elongated hole defined by the threading.
15 . A plating system for bone, the plating system comprising:
a plate member defining a longitudinal axis and having a top surface and a bottom surface, the plate member defining an elongated hole extending between the top surface and the bottom surface with a width in a direction generally perpendicular to the elongated axis and a length with a greater dimension in a direction generally parallel to the elongated axis, the elongated hole defined by a sidewall having a spherical cross section in the direction generally perpendicular to the elongated axis, the sidewall having a threading;
a first bone screw having a threaded and spherical head for threadably engaging the elongated hole; and
a second bone screw having an unthreaded and spherical head for seating in the elongated hole;
wherein the threading extends completely around the sidewall of the elongated hole such that the first bone screw may interchangeably engage the elongated hole anywhere along the length.
16 . The plating system for bone of claim 15 , wherein the threading of the elongated hole is a non-helical threading including at least closed one ridge extending completely about the inner circumference in a single plane.
17 . The plating system for bone of claim 16 , wherein the non-helical threading includes a plurality of closed ridges extending completely about the inner circumference.
18 . The plating system for bone of claim 15 , wherein the first bone screw has a shaft defining a shaft axis and wherein the head of the first bone screw cooperates with the threading and the spherical cross section of the elongated hole for threaded engagement of the first bone screw with the plate at various angles of the shaft axis relative to the plate.
19 . The plating system for bone of claim 15 , wherein the non-helical threading of the elongated hole accommodates translation of the threaded head of the first bone screw along the length of the first bone screw for compression of a fracture.
20 . The plating system for bone of claim 16 , wherein the elongated hole is helically threaded.