Iliosacral polyaxial screw
First Claim
1. A method of assembling an implant having a bone screw having a screw head and a shank portion extending from the screw head, the screw shank portion configured to engage bone, a housing having an opening configured to receive the screw head, a distal end of the housing having a threaded inner surface, a plurality of threaded insert members configured to surround the screw head and engage the threaded inner surface of the housing to secure the screw head within the housing, the plurality of threaded insert members including a first threaded insert member and a second threaded insert member disconnected from the first threaded insert member, the method comprising:
- disposing the first threaded insert member and the second threaded insert member around the screw head;
inserting the screw head and the first and second threaded insert members into the housing opening;
engaging the first and second threaded insert members with the threaded inner surface of the housing adjacent the opening to secure the screw head within the housing.
5 Assignments
0 Petitions
Accused Products
Abstract
Provided is an iliosacral polyaxial screw system. A multiple part insert member is provided to secure the screw to the housing of the assembly to accommodate screws in which the shank diameter of the screw is greater than the bottom opening of the screw housing or greater than the opening of a ring member designed to capture the head of the screw in the housing.
85 Citations
5 Claims
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1. A method of assembling an implant having a bone screw having a screw head and a shank portion extending from the screw head, the screw shank portion configured to engage bone, a housing having an opening configured to receive the screw head, a distal end of the housing having a threaded inner surface, a plurality of threaded insert members configured to surround the screw head and engage the threaded inner surface of the housing to secure the screw head within the housing, the plurality of threaded insert members including a first threaded insert member and a second threaded insert member disconnected from the first threaded insert member, the method comprising:
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disposing the first threaded insert member and the second threaded insert member around the screw head; inserting the screw head and the first and second threaded insert members into the housing opening; engaging the first and second threaded insert members with the threaded inner surface of the housing adjacent the opening to secure the screw head within the housing. - View Dependent Claims (2, 3, 4, 5)
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Specification