Instrument for the positioning of an implant in the human spine
First Claim
1. An instrument for the positioning of an implant in the human spine, as a replacement for one or more vertebra bodies located between two healthy vertebra bodies, comprising:
- a pair of vertebra body plates each attachable to a healthy vertebra body;
a pair of distraction rods, which at one end are attachable to one of said vertebra body plates;
two U-shaped parts, each having a pair of limbs forming the legs of the U, said limbs of each U-shaped part telescopically cooperate and form a tubular housing around the attached distraction rods, wherein the U-shaped parts comprise inner sections which are supported on the distractions rods; and
a distraction instrument which is connected to the distraction rods for exerting a force onto the rods transversely to their longitudinal extension.
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Accused Products
Abstract
An instrument for the positioning of an implant into the human spine, as a replacement for one or more diseased vertebra bodies has vertebra body plates attachable to the healthy vertebra bodies. Distraction rods are provided which at one end are attachable to a vertebra body plate. Two U-shaped parts having limbs which telescopically cooperate and form a tubular housing around the attached distraction rods. The U-shaped parts comprise inner sections which are supported on the distraction rods. A distraction instrument which is connectable to the other ends of the distraction rods is used for exerting a force onto the rods transversely to their longitudinal direction.
313 Citations
29 Claims
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1. An instrument for the positioning of an implant in the human spine, as a replacement for one or more vertebra bodies located between two healthy vertebra bodies, comprising:
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a pair of vertebra body plates each attachable to a healthy vertebra body;
a pair of distraction rods, which at one end are attachable to one of said vertebra body plates;
two U-shaped parts, each having a pair of limbs forming the legs of the U, said limbs of each U-shaped part telescopically cooperate and form a tubular housing around the attached distraction rods, wherein the U-shaped parts comprise inner sections which are supported on the distractions rods; and
a distraction instrument which is connected to the distraction rods for exerting a force onto the rods transversely to their longitudinal extension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for replacing diseased vertebra located between two healthy vertebra with an implant, comprising:
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attaching one of a pair of generally L-shaped guide elements to each of the two healthy vertebra, a first leg of the L-shaped guide element including a guide surface extending into a space between the healthy vertebra and the diseased vertebra;
attaching a rod to a second leg of each of the L-shaped guide elements, which leg extends along an outer surface of the healthy vertebra;
distracting said healthy vertebra by distracting said rods;
removing said diseased vertebra, creating a space between the healthy vertebra; and
inserting an implant having guide surfaces into said space by using the guide surfaces on said L-shaped guide element to guide corresponding guide surfaces on said implant. - View Dependent Claims (17, 18, 19)
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20. A method for replacing diseased vertebra located between two healthy vertebra with an implant comprising:
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attaching a rod to each healthy vertebra via an L-shaped plate, said L-shaped plate having a first leg including a guide surface extending into a space between a healthy vertebra and a diseased vertebra and a second leg fixed to an outer surface of said healthy vertebra;
distracting said healthy vertebra by distracting said rods;
removing said diseased vertebra creating a space between the healthy vertebra; and
inserting an implant having a guide surface formed thereon into said space by using the guide surface on said first leg of said L-shaped plate to guide a corresponding guide surface formed on said implant. - View Dependent Claims (21, 22, 23, 24)
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25. A system for replacing a diseased vertebra located between two healthy vertebra with an implant comprising:
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a generally L-shaped plate coupled to each of the two healthy vertebra, said plate having a first leg, including a guide surface extending into a space between the healthy vertebra and the diseased vertebra and a second leg fixed to said healthy vertebra;
a rod coupled to said second leg of each of said generally L-shaped plates and extending outwardly from said healthy vertebra;
a distraction tool engageable with said rod coupled to each healthy vertebra for distracting said healthy vertebra to allow removal of the diseased vertebra;
an implant having guide surfaces formed thereon engageable with the guide surfaces on said first leg of said L-shaped plate to guide the implant into a space created by the removal of the diseased vertebral; and
an expandable hollow cover sized to fit over said rods and surround said diseased vertebra. - View Dependent Claims (26, 27, 28, 29)
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Specification