Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
2008-07-30
2011-12-20
Barrett, Thomas C. (Department: 3775)
Surgery
Instruments
Orthopedic instrumentation
C606S099000
Reexamination Certificate
active
08080041
ABSTRACT:
A method for performing percutaneous interbody fusion is disclosed. The method includes the steps of inserting a guide needle posteriorly to the disc space, inserting a dilator having an inner diameter slightly larger than the outer diameter of the guide needle over the guide needle to the disc space to enlarge the disc space, and successively passing a series of dilators, each having an inner diameter slightly larger than the outer diameter of the previous dilator, over the previous dilator to the disc space the gradually and incrementally increase the height of the disc space. Once the desired disc height is achieved, the guide needle and all the dilators, with the exception of the outermost dilator, are removed. An expandable intervertebral disc spacer is then passed through the remaining dilator and positioned in the disc space. The disc spacer is expanded to the required disc height, and then a bone matrix is passed through the dilator to fill the disc space. The dilator is then removed. An expandable intervertebral disc spacer is also disclosed, having a tapered bore that causes greater expansion of one end of the spacer with respect to the other. A kit for performing the percutaneous interbody fusion procedure is also disclosed.
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Boehm, Jr. Frank H.
Melnick Benedetta Delorenzo
Barrett Thomas C.
Sevilla Christian
Warsaw Orthopedic Inc.
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