Disc Prosthesis Versus Multidisciplinary Rehabilitation

2014-08-27 03:41:46 | BioPortfolio


Surgical methods offered to patients with chronic low back pain are controversial. In addition, new and expensive treatment methods like total disc replacemet (TDR) are a challenge for the health care services. At present, ongoing randomized studies in both Europe and USA are comparing TDR to fusion. However, to our knowledge, no randomized trials have compared TDR to non-surgical treatment. The aim of the present study is to evaluate the effect of a comprehensive and structured non-surgical treatment with TDR surgery in patients with chronic low back pain and localized degenerative disc changes.

Main hypothesis: There is no difference in treatment effect between surgery with lumbar total disc prosthesis and a multidisciplinary rehabilitation program measured by Oswestry Disability Index after 1 and 2 years.

Secondary hypothesis: There is no difference in cost - effectiveness between surgery with lumbar disc prosthesis and a multidisciplinary rehabilitation program after 1 and 2 years.


Description of interventions.

Surgical intervention: The surgical intervention consists of replacement of the degenerative intervertebral lumbar disc with a artificial lumbar disc device (ProDisc II, Spine Solutions Inc. , New York, NY). The ProDisc consists of three pieces, two metal endplates and a polyethylene core that is fixed to the inferior endplate when the device is implanted, and is implanted through a retroperitoneal (or transperitoneal) access. Depending on the surgeon, a Pfannenstiel incision or a para median incision is used. A fluoroscope is used to ensure that the prosthesis is placed in the midline and sufficiently towards the posterior edge of the corpus vertebrae. All hospitals participating in the study will use the same artificial lumbar disc device, and standard instruments from the manufacturer are used for inserting the disc. Postoperatively, orthoses will not be used, but patients are given restrictions on heavy lifting and excessive movements the first 6 weeks after surgery. Otherwise, no instructions will be given. Six weeks after surgery, patients will be referred to physiotherapy.

Non-surgical intervention: The intervention is based on a treatment model described by Brox et al (Spine 2003;28:1913-1921) and consists of a cognitive approach and supervised physical exercise. The treatment is interdisciplinary and is directed by a team of physiotherapists and specialists in physical medicine and rehabilitation. The intervention is organized as an outpatient treatment in groups of 6 - 8 patients during a period of 12 - 15 treatment days. In agreement with the patient, individual goals for the rehabilitation process are established.


Several sub - projects will be conducted at the different hospitals in the study, in example validation of discography, RSA to validate the migration and motion of the prosthesis, a biomechanical study using DCRA technique, validation of a classification system for physiotherapy and a responsiveness of questionnaires included in the study.

Study Design

Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind, Primary Purpose: Treatment


Chronic Low Back Pain


Total Disc Prosthesis, Multidisciplinary rehabilitation program


Haukeland University Hospital




Ullevaal University Hospital

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:41:46-0400

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Medical and Biotech [MESH] Definitions

The replacement of intervertebral discs in the spinal column with artificial devices. The procedure is done in the lumbar or cervical spine to relieve severe pain resulting from INTERVERTEBRAL DISC DEGENERATION.

The dissolving of the NUCLEUS PULPOSUS, the semi-gelatinous tissue of a displaced INTERVERTEBRAL DISC. It is usually achieved by the direct injection of a proteolytic enzyme, especially CHYMOPAPAIN, into the herniated disc.

Fibrocartilage inner core of the intervertebral disc. Prolapsed or bulged nucleus pulposus leads to INTERVERTEBRAL DISC DISPLACEMENT while proliferation of cells in the nucleus pulposus is associated with INTERVERTEBRAL DISC DEGENERATION.

A prosthetic appliance for the replacement of areas of the maxilla, mandible, and face, missing as a result of deformity, disease, injury, or surgery. When the prosthesis replaces portions of the mandible only, it is referred to as MANDIBULAR PROSTHESIS.

The diagnosis and treatment of human responses of individuals and groups to actual or potential health problems with the characteristics of altered functional ability and altered life-style. (American Nurses Association & Association of Rehabilitation Nurses. Standards of Rehabilitation Nursing Practice, 1986, p.2)

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