Patent ID: 9034039
Filing Date: 2015-05-19
Classification: A61F

Abstract:
1. An implant for use between two adjacent spinal vertebrae, the implant comprising a first outer tubular sleeve extending along a longitudinal axis, having an axially outwardly directed first outer bearing surface engageable with one of the two vertebrae, and formed with an array of transversely extending and radially throughgoing slots imparting longitudinal elastically to the first sleeve; a second inner tubular sleeve extending along the longitudinal axis, having a respective axially oppositely outwardly directed second outer bearing surface engageable with the other of the two vertebrae, having an external screwthread, and fittable coaxially in and slidable axially on the first sleeve; and a ring having an internal thread engaged with the external screwthread of the second sleeve and an array of external teeth, the ring bearing axially on the second outer tubular sleeve such that rotation of the ring on the first sleeve can axially shift the second sleeve axially relative to the first sleeve to change a length of the implant.