ProDisc-C device doesn't change facet joint pressures

ProDisc-C device doesn't change facet joint pressures
Local facet joint contact pressures are not significantly altered during sagittal bending after the implantation of a ProDisc-C device at the C5 to C6 level in cadaveric human cervical spines, according to a study published online Sept. 12 in The Spine Journal.

(HealthDay)—Local facet joint contact pressures are not significantly altered during sagittal bending after the implantation of a ProDisc-C device at the C5 to C6 level in cadaveric human cervical spines, according to a study published online Sept. 12 in The Spine Journal.

Joel A. Bauman, M.D., from the University of Pennsylvania in Philadelphia, and colleagues conducted a biomechanical study using seven C2 to T1 osteoligamentous cadaveric cervical spines instrumented with a transducer to measure the C5 to C6 facet pressure profiles during physiological sagittal bending. Pressure was measured before and after implantation of a ProDisc-C at the C5 to C6 level.

The researchers found that, following implantation, the mean C5 to C6 range of motion increased significantly, from 9.6 ± 5.1 degrees in the intact condition to 16.2 ± 3.6 degrees after implantation. During extension there was no significant difference in the facet contact pressure between the intact (64 ± 30 kPa) and implanted (44 ± 55 kPa) conditions, despite the changes in rotation. There was also no difference in facet pressure during flexion.

"Although implantation of a ProDisc-C arthroplasty device at the C5 to C6 level increases angular rotations, it does not significantly alter the local facet pressure at the index level in flexion or extension," the authors write. "Using a technique that preserves the capsular ligament, this study provides the first direct measurement of cervical pressure in a disc condition."

Several authors disclosed financial ties to the medical industry.

More information: Abstract
Full Text (subscription or payment may be required)

add to favorites email to friend print save as pdf

Related Stories

Good stability with artificial disc plus cage fusion

Aug 10, 2012

(HealthDay) -- For patients with multi-level cervical disc herniation, artificial cervical disc replacement and adjacent segment cage fusion achieves definite stabilization and satisfactory mobility, according ...

Lasting benefit for rotating-Platform knee arthroplasty

Apr 25, 2012

(HealthDay) -- After at least 10 years of follow-up, total knee replacement using a second-generation, cemented, rotating-platform, posterior-stabilized total knee prosthesis offers excellent and durable clinical ...

Lowest fused vertebral level linked to motion in scoliosis

May 10, 2012

(HealthDay) -- For postoperative patients with adolescent idiopathic scoliosis (AIS), preservation of vertebral motion segments allows for greater distribution of functional motion, according to a study published ...

Recommended for you

Cold cash just keeps washing in from ALS challenge

Aug 28, 2014

In the couple of hours it took an official from the ALS Association to return a reporter's call for comment, the group's ubiquitous "ice bucket challenge" had brought in a few million more dollars.

Medtronic spends $350M on another European deal

Aug 27, 2014

U.S. medical device maker Medtronic is building stronger ties to Europe, a couple months after announcing a $42.9 billion acquisition that involves moving its main executive offices across the Atlantic, where it can get a ...

Mind over matter for people with disabilities

Aug 26, 2014

People with serious physical disabilities are unable to do the everyday things that most of us take for granted despite having the will – and the brainpower – to do so. This is changing thanks to European ...

User comments