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the ProDisc-C total disc replacement from Synthes Spine is a FDA approved
spinal implant intended to reconstruct the diseased intervertebral disc in the
cervical spine
the ProDisc-C is indicated for patients suffering from intractable symptomatic
cervical disc disease or SCDD
at one level between C three and C seven
the ProDisc-C is a ball and socket implant that is composed of two cobalt
chrome alloy endplates and a polyethylene insert
the polyethylene insert is affixed to the bottom endplate forming the ball
and a polished dome in the top endplate forms the socket
the implants components work together with the surrounding spinal structures
to provide stability and function
the ProDisc-C implant is secured to the vertebral bodies above and below the
disc space
and held in place with two central keels
all bone contacting surfaces of the ProDisc-C implant
have a plasma sprayed titanium coating to promote boney on growth providing
long-term implant stability
the ProDisc-C is a zero profile implant that does not contact soft
tissue structures after it is implanted
first an incision is made in the neck at the location of the diseased disc
the soft tissues are moved away from the front of the diseased disc
the surgeon then performs a discectomy and remobilization
removing the diseased disc and releasing pressure on the surrounding nerves and
spinal cord
once the disc space is cleared and the segment is remobilized a trial is used
to assess the implants size and position within the disc space
next keel channels are prepared in the vertebral bodies above and below the
disc space
the keel channels for the ProDisc-C implant can be prepared using either a
milling technique
or a chiseling technique
in the milling technique a milling bit is used to create the channels for the
ProDisc- C keel
the chisel technique utilizes two chisels to create the keel channels
the primary chisel is inserted over the trial and advanced into the vertebral
bodies
the step is repeated with a secondary chisel to remove any remaining bits of
bone from the keel channels
both the milling and chiseling instruments
are designed to ensure that the final placement of the implant precisely
matches the placement of the trial
after the keel channels have been prepared the vertebral bodies are ready to be
implanted with the ProDisc -C implant
the implant is attached to the insertor
the keels are aligned with the keel channels
and the implant is inserted all block into the vertebral bodies
the instruments are removed and the final implant placement is confirmed