US 12,419,668 B2
Rod coupling assemblies for bone stabilization constructs
Francois Follini, Santa Clara, CA (US); Derek P. Lindsey, San Jose, CA (US); and Bret Schneider, San Jose, CA (US)
Assigned to SI-Bone Inc., Santa Clara, CA (US)
Appl. No. 17/777,679
Filed by SI-BONE INC., Santa Clara, CA (US)
PCT Filed Nov. 23, 2020, PCT No. PCT/US2020/061849
§ 371(c)(1), (2) Date May 18, 2022,
PCT Pub. No. WO2021/102429, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/938,546, filed on Nov. 21, 2019.
Prior Publication US 2023/0000526 A1, Jan. 5, 2023
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7032 (2013.01); A61B 17/7098 (2013.01)] 17 Claims
OG exemplary drawing
 
17. A rod coupling system including a bone implant and a tulip assembly for securing a rod relative to the bone implant, the system including:
a bone implant having a proximal region spaced from a distal region, the proximal region configured to interface with a tulip assembly that includes a collet and a tulip,
the bone implant proximal region including a recessed collet receiving region configured and sized to receive therein a bone implant interface region of the collet, the collet receiving region including a recessed axially extending surface and a radially extending surface that is disposed at an angle less than ninety degrees relative to a bone implant longitudinal axis, the recessed axially extending surface and the radially extending surface meeting one another,
a tulip assembly having an opening therethrough configured to receive a rod therethrough, the tulip assembly including a collet and saddle sized to be disposed at least partially within the tulip,
the collet having a partially spherical configuration, the tulip having an inner surface and the collet having an outer surface that are sized and configured to interface with each other when the collet is disposed within the tulip, the tulip inner surface and the collet outer surface both configured to cause the tulip to be movable relative to the collet in a movable state,
the collet including an implant interface region that includes a radially extending surface disposed at an angle relative to a collet longitudinal axis, the radially extending surface of the implant interface region positioned to be facing the radially extending surface of the recessed collet receiving region when the bone implant interface region is interfaced with the recessed collet receiving region and such that a gap exists between the radially extending surface of the implant interface region and the radially extending surface of the recessed collet receiving region,
the saddle sized to be disposed within the tulip and at least partially proximal to the collet, the saddle having a distal region with an inner curved surface shaped to mate with a curved proximal region of the collect, the saddle having a proximal end with a recessed region having a configuration shaped to interface with the rod,
the collet having one or more openings therein that cause the collet to apply a radially inward clamping force in response to force applied to the collet from the tulip and the saddle,
a set screw sized and configured to be threaded into the tulip and apply a force to the rod and secure a position of the tulip relative to the bone implant.