Patent ID: 11864799
Assignee: AESCULAP AG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. A favored angle pedicle screw assembly comprising:
A. a pedicle screw having a screw head and a threaded shank, at least a portion of the screw head comprising a spherical surface; and
B. a rod receiver body comprising a tubular wall having a first end with a first opening, a second end with a second opening, and a bore extending from the first opening to the second opening,
the bore comprising:
i. a first bore section adjacent to the first opening, the first bore section defining a first bore axis;
ii. a second bore section adjacent the second opening, the second bore section defining a second bore axis and a seat surface that is symmetrical relative to the second bore axis; and
iii. a third bore section having a first end immediately adjacent to and continuous with the first bore section and a second end immediately adjacent to and continuous with the seat surface, the third bore section defining a transition surface that conforms to a side wall of an oblique three-dimensional shape,

the pedicle screw being securable in the rod receiver body in a seated position in which the spherical surface slidably engages the seat surface and does not contact the transition surface.