Source: https://patents.google.com/patent/US8128701B2/en
Timestamp: 2019-08-25 23:56:22
Document Index: 294553391

Matched Legal Cases: ['art 2', 'art 3', 'art 2', 'art 3', 'art 2', 'art 3', 'art 2', 'art 3', 'art 2']

US8128701B2 - Implant for use between spiral vertebrae - Google Patents
US8128701B2
US8128701B2 US12/257,527 US25752708A US8128701B2 US 8128701 B2 US8128701 B2 US 8128701B2 US 25752708 A US25752708 A US 25752708A US 8128701 B2 US8128701 B2 US 8128701B2
US20100106251A1 (en
The invention relates to an implant for use between the vertebrae (8) of the spine as a placeholder for vertebrae or vertebrae parts removed from the spine, having a first implant part (2) and a second implant part (3), which can be adjusted against each other in the direction of the coaxial longitudinal axis thereof for changing the length of the implant (1), and having at least one mounting bracket (10) that can be attached to one of the implant parts (2 and 3), and which faces the adjacent vertebra, and partially overlaps the same. The mounting bracket (10) is formed by a vertebra attachment plate (11) and by a base plate (12) comprising a guide rail (13), protruding from the vertebra attachment plate, and serving for the radial adjustment of the mounting bracket (11) as opposed to the one implant part (2 and 3), is wherein a means is associated with the one implant part (2 and 3) for the radial fixation of the base plate (12).
Such an implant is known from EP 0 950 388 [U.S. Pat. No. 6,190,413]. This implant is comprised of a total of three implant is parts; two end permanent parts installed on the adjacent vertebra, and one center implant part positioned between them, which are connected to each other via screwthreads. Holes are formed in the end implant parts serving primarily for enabling access to the interior of the implant parts for inserting bone cement or bone material. These holes are also utilized to optionally attach a mounting bracket having a circular collar to one of the end implant parts, holes being formed in the collar that can be aligned with two holes formed in the end implant part. Bolts can be fitted through the aligned holes. The mounting bracket has a longitudinal slot whose width varies such that the pins can be fixed in the holes. As a result the mounting bracket is attached at the outer edge of the end implant part, and can be utilized to improve the stability of the spine without preventing access to the implant parts.
FIG. 1 shows an implant 1 for use between vertebrae 8 of the spine as placeholders for vertebrae or vertebral parts removed from the spine. This implant 1 consists of a first implant part 2 and a second implant part 3 that can be moved relative to each other in the direction of their coaxial longitudinal axes for changing the length of the implant 1. This adjustability is achieved in that the first implant part 2 and the second implant part 3 are formed as tubular sleeves, the first implant part 2 surrounding the second implant part 3 and having a rotatable threaded ring 4 carried on the first implant part 2 and having an annular screwthread on its inner edge by means of which it engages into a screwthread 5 of the second implant part 3. The threaded ring 4 is equipped with teeth 6, particularly pinion teeth, on its is outer surface such that the change of length can be achieved for distraction of the vertebrae 8 by rotation of the threaded ring 4 by means of a surgical instrument so as to be screwed into a threaded bore of the first implant part 2.
1. An implant for use between a pair of spinal vertebrae, the implant comprising:
a retaining screw engaged through the base plate of the first bracket and into the threaded bore of the end plate and having a head slidable diametrally in the slot for fixing any of a plurality of radially offset positions of the base plate of the first bracket and the first center part, the guide having undercut edges forming recessed ridges on which the head of the retaining screw bears axially, a top face of the head being level with or below a top face of the base plate of the first bracket.
US20100106251A1 US20100106251A1 (en) 2010-04-29
US8128701B2 true US8128701B2 (en) 2012-03-06
FR2897770A1 (en) 2006-02-28 2007-08-31 Fortin Frederic Implantable vertebral body replacing prosthesis for use in minimally invasive surgery, has platforms disposing large support surface on vertebral body, and envelope serving as reservoir whose shape is compatible with platforms
US20100106251A1 (en) 2010-04-29