Dynesys® Dynamic Neutralisation System for the Spine

The non-fusion system for the spine is setting a new standard.

Click through or scroll down for: new method in treatment, biomechanics, philosophy Go here for literature review

Dynesys from Zimmer Spine (Europe, Africa and Middle East) is an alternative method of treatment for degenerative diseases of the lumbar spine.

In the natural course of spine degeneration, the functional tripod (disc and facet joints) goes through several stages of instability. The early stages being failure of the disc and paraspinal muscles, followed by osteoarthritis of the facet joints, subsidence of the upper vertebra into the lower on and stenosis. The end stage is a fused deformity. In the phase of degeneration where symptoms are caused by disco-vertebral dyskinesis, that is between the stages of early failure of the disc and fused deformnation, a dynamic stabilisation of the dyskinetic segment provides distinct benefits. It may even slow down the degenerative process.

The concept of Dynesys is the segmental mobile stabilisation:

to control segmental motion;
to stop pathological motion;
to neutralise excessive forces;
to protect stabilisation structures;
to prevent progressive deformity;
to maintain function.

In other words: to substitute the lost physiological stabilising restraints.

Dynesys is safe and effective procedure to neutralise and prevent segmental dysstabilitiy in early and advanced stages of degenerative lumbar spine disease. In combination with a fusion procedure Dynesys allows a segmental fusion or non-fusion treatment in the same patient, depending on the severity of the degenerative disease. Dynesys is one of the most versatile instrumentation systems available for the treatment of degenerative lumbar spine disease. (O. Schwarzenbach, MD)

Dynesys: An innovative method in the treatment of the degenerative disc disease

Recovery of the posterior disc height, facet joints, ligaments and articulations.
Realignment of the articular facets.
Stabilisation of the disc, facet joints and ligaments.

Dynamic Neutralisation System for the Spine

Controlled range of motion by suppressing the discovertebral dyskinesis.
No requirement to fuse, facet joints and disc stay intact.
Load sharing between anatomy and device.

Stablisation allows a controlled range of motion

Dynesys Biomechanics: the support

The individual parts, connections and the complete system were tested statically and dynamically.
Fatigue tests over ten million cycles have shown the safety and effectiveness of the Dynesys system.
The influence of the implant on spinal motion was studied using a spine simulator and Finite Element Modelling.
These tests have shown that Dynesys can restabilise an unstable segment close to the characteristics of physiological conditions.
In vivo measurements indicate that Dynesys helps patients regain their ability to control their motion patterns.

Computer Simulation

Finite Element Modelling (FEM)

Dynesys: A new spine philosophy

Surgeons have treated over 38,000 patients successfully.
After the first implantation in 1994, consecutive patient series have been documented by the neutralisation group surgeons. This ongoing prospective multi-centre study (in 2002) has a mean follow-up time of three years (range: 1-7 years) and includes 83 patients and will be extended with a follow-up of 5 years (range 2-10 years).
It is particularly interesting that there is evidence supporting the idea that Dynesys may slow down the degenerative process (decrease of Modic type 1 changes a few months after Dynesys implantation).
In order to demonstrate the high value Dynesys provides to many spine surgeons and their patients, further clinical studies are underway.

Preoperative

Go here to review Literature References for Dynesys

Postoperative

Request Product Brochure / Surgical Technique