US 12,458,415 B2
Systems and methods for correcting spinal curvature and associated instruments
Michael Krasovic, San Diego, CA (US); Hayden Chun, San Diego, CA (US); and Jacqueline M. Bierre, San Diego, CA (US)
Assigned to NuVasive, Inc., San Diego, CA (US)
Filed by NuVasive, Inc., San Diego, CA (US)
Filed on Dec. 2, 2022, as Appl. No. 18/074,090.
Application 18/074,090 is a continuation of application No. PCT/US2020/037656, filed on Jun. 14, 2020.
Prior Publication US 2023/0101502 A1, Mar. 30, 2023
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/708 (2013.01) [A61B 17/7032 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A vertebral body derotation system comprising:
a first pair of derotation towers coupled to a first pair of bone anchors, each bone anchor of the first pair of bone anchors configured to be positioned on opposing sides of a first vertebral body;
a second pair of derotation towers coupled to a second pair of bone anchors, each bone anchor of the second pair of bone anchors configured to be positioned on opposing sides of a second vertebral body;
a first transverse coupler extending across the first vertebral body and coupled to each derotation tower of the first pair of derotation towers;
a second transverse coupler extending across the second vertebral body and coupled to each derotation tower of the second pair of derotation towers;
at least one clamp configured to couple the first and second transverse couplers in a cranial-caudal direction or a first derotation tower of the first pair of derotation towers and a second derotation tower of the second pair of derotation towers in the cranial-caudal direction; and
one or more actuation mechanisms, and
wherein one or more derotation towers of the first pair of derotation towers and the second pair of derotation towers is configured to transition between an unlocked position and a locked position via the one or more actuation mechanisms, and
wherein each derotation tower of the first pair and second pair of derotation towers includes:
an inner elongate member having a proximal end and a distal end, the distal end of the inner elongate member having a pair of opposing extensions separated by a channel; and
an attachment arm within each extension of the pair of opposing extensions of each inner elongate member, the attachment arm being configured to translate between the unlocked and locked position.