Assemblies for determining height and angle of an intervertebral device

Abstract

An assembly for determining height and angle of an intervertebral device to be implanted in an intervertebral space. The assembly comprises a sizing instrument () comprising a support () attached to first and second arms (), () which extend in generally a same direction from the support. The assembly also comprises superior and inferior endplates (), () of the intervertebral device to be implanted. One of the superior and inferior endplates (), () engages with a distal end of the first arm () and the other of the superior and inferior endplates (), () engages with a distal end of the second arm (), the superior and inferior endplates opposing each other when they are engaged with their respective arms. The distal end of the second arm () performs first and second forms of movement relative to the distal end of the first arm (), the first and second forms of movement being independent of each other, the distal end of the second arm moving along different respective paths in the first and second forms of movement, the first form of movement changing separation between the superior and inferior endplates (), (), and the second form of movement changing an angle between the superior and inferior endplates (), (). The support () comprises a user control which is mechanically coupled to at least the second arm () of the first and second arms to provide upon user operation of the user control each of the first and second forms of movement of the distal end of the second arm.