Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1999-03-23
2000-09-05
Wilson, John J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 244
Patent
active
061136395
ABSTRACT:
A trial implant for evaluating a size of an intradiscal space for subsequent implantation of a prosthetic spinal disc nucleus. The trial implant is comprised of an elongated central body and a retrieving body. The elongated body is formed from a rigid, surgically safe material and preferably has a volume less than a volume of a nucleus cavity portion of the intradiscal space. The retrieving body is associated with the central body and is configured to facilitate retrieval of the trial implant from an enclosed area, such as the nucleus cavity. A plurality of trial implants are included with a trial implant kit, with each of the plurality of trial implants housing a different size and/or shape. During use, the trial implant provides an indication as to whether a similarly sized prosthetic spinal disc nucleus will fit within a particular intradiscal space.
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J.N. Weinstein, `The Artificial Disc`, Clinical Efficacy and Outcome in the Diagnosis and Treatment of Low Back Pain,pp. 205-225, Published 1992.
Assell Robert L.
Ray Charles D.
RayMedica, Inc.
Robert Eduardo C.
Wilson John J.
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