CP-ESP – The cervical prosthesis

Overview

The ESP prosthetic disc is the result of 10 years of collaborative research work at the Hôpital Pitié Salpêtrière in Paris, the French Atomic Energy Commission (CEA) and the Université Paris VI, and was driven by the Oséo Innovation contest in France.

The disc consists of two titanium alloy end plates separated by a deformable core intended to allow natural disc movements.

The ESP prosthetic disc restores the mechanical properties of the intervertebral disc and in particular, its shock-absorbing properties.

Specifics

Heights from 5mm to 7mm
Benefits from over 10 years of development
6 degrees of freedom
Adaptive center of rotation
No surface bearing for increased lifetime
Improved stability
Shock absorbing

Concept

The CP ESP prosthesis helps to reduce pain and to achieve near-normal disc function.

The stiffness of the deformable core resembles that of the native intervertebral discs. This stiffness is due to a flexible polycarbonate urethane cushion. This flexible cushion, attached to the two metal endplates, provides the disc with its shock-absorbing function and limits the release of particles into the body and the calcification of deformable parts.

Indications

Symptomatic cervical disc disease, defined as pain (radicular) and/or functional or neurological deficit in the following disease conditions (confirmed by CT scan, MRI or radiographs):
– Herniated nucleus pulposus
– Spondyloarthritis (defined as the presence of osteophytes)
– Nerve root compression
– Herniated disc
– Nerve compression

Features

The CP-ESP has spikes that ensure primary fixation to the vertebrae being treated. A hydroxyapatite coating over a rough, porous underlayer of T40 pure titanium allows for effective secondary fixation.

Publications

Lazennec, J.Y., et al., The innovative viscoelastic CP-ESP cervical disc prosthesis with 6 degrees of freedom: biomechanical concepts, development program and preliminary 2 years clinical experience. Eur J Orthop Surg Traumatol 2015.