US 12,082,853 B2
Pivotal bone anchor assembly with positioner-retainer containment and insert tool deployment
Roger P. Jackson, Prairie Village, KS (US); and James L. Surber, Kansas City, KS (US)
Filed by Roger P. Jackson, Prairie Village, KS (US)
Filed on May 5, 2023, as Appl. No. 18/313,000.
Application 18/313,000 is a continuation of application No. 18/174,391, filed on Feb. 24, 2023.
Application 18/174,391 is a continuation of application No. 16/719,561, filed on Dec. 18, 2019.
Application 16/719,561 is a continuation of application No. 15/897,486, filed on Feb. 15, 2018, granted, now 10,543,021, issued on Jan. 28, 2020.
Application 15/897,486 is a continuation of application No. 15/629,709, filed on Jun. 21, 2017, granted, now 9,924,975, issued on Mar. 27, 2018.
Application 15/629,709 is a continuation in part of application No. 15/521,163, granted, now 10,188,432, issued on Jan. 29, 2019, previously published as PCT/US2015/056706, filed on Oct. 21, 2015.
Claims priority of provisional application 62/362,830, filed on Jul. 15, 2016.
Claims priority of provisional application 62/352,876, filed on Jun. 21, 2016.
Claims priority of provisional application 62/212,253, filed on Aug. 31, 2015.
Claims priority of provisional application 62/200,501, filed on Aug. 3, 2015.
Claims priority of provisional application 62/200,491, filed on Aug. 3, 2015.
Claims priority of provisional application 62/194,955, filed on Jul. 21, 2015.
Claims priority of provisional application 62/137,713, filed on Mar. 24, 2015.
Claims priority of provisional application 62/137,707, filed on Mar. 24, 2015.
Claims priority of provisional application 62/078,173, filed on Nov. 11, 2014.
Claims priority of provisional application 62/078,154, filed on Nov. 11, 2014.
Claims priority of provisional application 62/066,813, filed on Oct. 21, 2014.
Claims priority of provisional application 62/066,806, filed on Oct. 21, 2014.
Prior Publication US 2023/0270471 A1, Aug. 31, 2023
Int. Cl. A61B 17/70 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7038 (2013.01); A61B 17/8605 (2013.01); A61B 17/864 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical implant assembly for securing an elongate rod to a bone of a patient via tooling and a closure top, the medical implant assembly comprising:
a shank comprising a longitudinal axis, a head at a proximal end of the shank, and a body extending distally from the head, the body including an anchor portion configured to anchor to the bone, the head including an at least partial spherical outer surface with a hemisphere diameter defined at a maximum diameter of the head in a plane perpendicular to the longitudinal axis of the shank;
a receiver comprising a base defining a lower portion of a central bore centered about a vertical centerline axis and configured to receive the head of the shank, and an upper portion of the central bore defining a channel configured to receive the elongate rod, the central bore communicating with a bottom of the base through a lower opening and extending upward through the channel to a top of the receiver and including a closure mating structure adjacent the top of the receiver configured to mate with the closure top, the central bore further including a lower locking region in the base adjacent the lower opening, an upper capture region above the lower locking region, and a discontinuous and non-resilient horizontal ridge protruding inwardly and extending circumferentially around the central bore between the upper capture region and the closure mating structure, the head of the shank being uploadable into the upper capture region through the lower opening of the base;
an insert positionable into the central bore of the receiver prior to the head of the shank, the insert having a top surface and a side surface configured to engage with the horizontal ridge, the side surface engaging the horizontal ridge when the insert is in a first position in the central bore so as to at least partially hold the insert in the channel of the receiver and inhibit downward movement of the insert within the central bore, and the top surface engageable with the horizontal ridge when the insert is in a second position in the central bore below the first position so as to inhibit upward movement of the insert within the central bore;
a resilient first open ring structure positionable within the upper capture region below the insert and prior to the head of the shank; and
a resilient second open ring structure positionable within and substantially surrounded by the first open ring structure so as to be contained in the upper capture region prior to the head of the shank being uploaded into the receiver,
wherein the head of the shank is uploadable through the lower opening of the base so as to expand the second open ring structure within the first open ring structure positioned in the upper capture region, after which the second open ring structure is configured to move downward into the lower locking region so as to capture the head of the shank within the central bore of the receiver; and
wherein the insert is configured to downward displace within the central bore from the first position to the second position via direct forcible engagement with the tooling.