| 主权项 |
1. A spinal implant, comprising;
an arm portion having a lengthwise direction; a body portion joined to or integral with said arm portion, said body portion having a through-hole therethrough and having a blind hole, said blind hole intersecting said through-hole, said blind hole having internal, threads; a setscrew having external threads complementary to said internal threads of said blind hole; a spinal rod received in said through-hole; and a saddle element received in said blind hole of said body portion, said saddle element having a vertical axis and being able to rotate around said vertical axis with respect to said body portion, said saddle element contacting said spinal rod and having an underside complementary or at least partially complementary to said spinal rod, wherein said setscrew urges said saddle element against said spinal rod and said saddle element urges said spinal rod against an internal surface of said through-hole, wherein said through-hole can accept said spinal rod at a range of angles distributed in a horizontal plane, and wherein said saddle element is able to occupy a range of angles around said vertical axis of said saddle element corresponding to said range of angles of said spinal rod, wherein said saddle element comprises a recess in a top surface of said saddle element, said recess having a depth from said top surface, wherein said implant comprises a control rod secured to said body portion and fitting within said recess in said saddle element, wherein said control rod cooperates with an internal shape of said recess to limit rotation of said saddle element about said vertical axis with respect to said body portion to a range of angles. |
