lumbar model teaching medical human lumbar disc compression demonstration spinal bone extrusion pathology bone teaching aids 腰椎模型 教学医学人体腰椎间盘受压演示 脊柱骨突出病理骨质教具

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 Lumbar disc herniation / Demonstration model

Lumbar disc herniation is one of the more common conditions. This occurs due to degenerative changes in various parts of the lumbar disc—such as the nucleus pulposus, annulus fibrosus, and cartilaginous layers—especially the nucleus pulposus. Under the influence of external forces, the annulus fibrosus ruptures, and the nucleus pulposus protrudes from the rupture site into the back or spinal canal, causing irritation or compression of adjacent spinal nerve roots. This leads to lower back pain, numbness, and pain in one or both lower limbs, among other clinical symptoms. Lumbar disc herniation is most prevalent at the L4-L5 and L5-S1 levels, accounting for approximately 95% of cases.

In this context, we developed this model

This model features the fourth and fifth lumbar vertebrae enlarged by 1.5 times, consisting of intervertebral discs and spinal nerves. The intervertebral discs are made of a soft elastic material to facilitate user demonstrations. It also shows the changes that occur in the intervertebral discs when the body bends or curls.
This model is widely applicable in orthopedics, used for clinical teaching, occupational disease prevention, ergonomics, sports education, and more. It serves as a valuable aid for teaching and demonstration!