1

ProDisc L: Motion Preservation DevicePerformed by: Michael Janssen, DO

August 20, 2007

Welcome High School Students!!!

The Spine

•7 Cervical▫ 8Nerve Roots

•12 Thoracic▫ 12 Nerve Roots

•5 Lumbar▫5 Nerve Roots

The Lumbar Spine

Axial View of a Vertebra

Disc Anatomy

Notice the darker than normal disc space. This is characteristic of a disc with DDD.

MRI Imaging (Healthy/DDD)

ProDisc L

• Motion Preservation System• Treat DDD (Degenerative Disc Disease): L3-S1• Intended to:

▫ Remove diseased disc▫ Reduce discogenic pain▫ PRESERVE MOTION IN DISC

• Superior & Inferior Plate▫ Cobalt Chrome Alloy▫ Central keel: fixation security

• Polyethylene Inlay▫ Ultra high polyethylene

• Developed by Synthes

Degenerative Disc Disease (DDD)

• Breakdown and deterioration of intervertebral disc

• Loss of water content in pulposus• Stretching, degeneration, & rupture of annulus

▫Bulging of disc ▫Leads to leakage of nucleus’ content

• Nerve root compression• Pain/numbness in associated extremities• Stiffness in back• Limited ability to continue desired lifestyle

Disc Herniation

•Compression/Pressure on Nerve Root: Symptoms?▫Numbness▫Shooting Pains▫Tingling▫Weakness▫Loss of sense

Anterior Lumbar Discectomy & ProDisc L

•Abdominal Incision•Abdominal muscles deflected laterally;

peritoneal cavity avoided•Iliac deflected laterally•Midline of target disc determined;

discectomy performed•Placement of ProDisc L

Questions?

c/o = Complains ofLBP = Lower Back PainX = ForPE = Physical ExaminationWNL = Within Normal LimitsVAS = Pain Scale

GVM = Patient Initials

ESI = Epidural Steroidal InjectionPT = Physical TherapyVAX–D = Type of DecompressionMRI = Magnetic Resonance ImagingDDD = Degenerative Disc Disease

X-ray Imaging

X-ray Imaging

X-ray Imaging

MRI Imaging

X-ray Imaging

MRI Imaging

Dark disc space in image to right indicates loss of water content and therefore a degenerating disc. Image above shows narrowed nerve root space where nerves are being pinched due to DDD.

Now its time for the surgery

Closing Remarks

•How were you challenged today? •How can we improve days like this?•How has today changed your view of

medicine? •Questions?