Intervertebral endoprosthesis with a toothed connection plate
First Claim
1. An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate having teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, another side of the connection plate being configured to engage a core of the intervertebral endoprosthesis,the teeth being defined by surfaces comprising main surfaces arranged in the direction of application, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, and the main surfaces of the teeth extending substantially perpendicularly from the side of the connection plate.
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Accused Products
Abstract
An implant, in particular an intervertebral endoprosthesis, with a connection plate (3) which is to be fixed so as to bear on a bone surface and which is to be applied to the bone surface in a direction of application running transverse to its main extension. For protection against a shearing force running parallel to its main extension, the connection plate (3) has teeth (6) projecting in the direction of application. These teeth (6) are delimited by surfaces (11, 12, 13) which include a main surface (11) arranged in the direction of application and transverse to the direction of shearing. Two teeth or groups of teeth in each case lie opposite one another in the direction of shearing and point in opposite directions.
422 Citations
13 Claims
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1. An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate having teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, another side of the connection plate being configured to engage a core of the intervertebral endoprosthesis,
the teeth being defined by surfaces comprising main surfaces arranged in the direction of application, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, and the main surfaces of the teeth extending substantially perpendicularly from the side of the connection plate.
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2. An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate comprising teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application,
each tooth being defined by surfaces comprising a main surface arranged in the direction of application, side surfaces, and a rear surface, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, wherein the main surfaces of the teeth of the one group are oriented so as to face away from the main surfaces of the teeth of the other group.
Specification