Stryker Expandable Lumbar Cage

Product Overview

The Stryker Expandable Lumbar Cage combines an innovative expandable mechanical structure with advanced Tritanium 3D‑printed technology. The device restores disc height and segmental lordosis through in‑situ expansion, while its biomimetic porous structure is designed to promote bone ingrowth and biological fixation. It is indicated for posterior lumbar interbody fusion (PLIF) and transforaminal lumbar interbody fusion (TLIF).

Clinical Indications

• Degenerative disc disease with instability

• Grade I‑II lumbar spondylolisthesis

• Revision surgery for recurrent disc herniation

• Post‑decompression fusion for spinal stenosis

• Corpectomy reconstruction (lumbar spine)

• Pseudoarthrosis repair

Target levels: L1 – S1 (single or multi‑level)
Surgical approaches: PLIF / TLIF

Key Features

Expandable Design

• In‑situ expansion – restores intervertebral height and lordosis through controlled expansion

• Low insertion height – smaller initial profile facilitates minimally invasive placement

• Independent control – selectable anterior or posterior expansion to adjust lordosis

Tritanium 3D Printing Technology

• Proprietary AMagine™ technology – additive manufacturing for precise porous architecture

• Biomimetic porosity – irregular pore size and shape mimicking cancellous bone

• Fully interconnected pores – through‑pores from endplate to endplate

• Fluid retention capacity – better fluid retention compared to traditional titanium

Cage Design Features

• Large lateral windows – facilitate bone graft packing and radiographic fusion assessment

• Bi‑directional fixation teeth – solid‑tip serrations for multi‑directional anti‑migration

• Curved profile option – Tritanium TL curved cage for oriented insertion

Size Options

• Multiple footprint sizes available

• Height range: 8 – 14 mm

• Lordotic angles: 0° / 6° / 12° (including 12° hyper‑lordotic option)

Comparison – Stryker Expandable Cage vs. Traditional Static Cage

Clinical insight: The Tritanium technology in Stryker Expandable Lumbar Cage uses 3D printing to create a cancellous bone‑like porous structure designed to promote bone ingrowth and biological fixation. Clinical data shows fusion rates of 91‑96% with Tritanium cages.

For more surgical cases of this product, please contact us.

Why Choose CZMEDITECH as Your Stryker Expandable Lumbar Cage Supplier?

• Minimally invasive friendly – low initial height enables smaller incision insertion

• Precise height restoration – expandable design provides better disc height recovery

• Promotes fusion – Tritanium porous structure designed for bone ingrowth

• Radiographic compatibility – titanium material + large windows for postoperative fusion assessment

• Multiple options – straight/curved profiles, various sizes for different anatomy

• Clinically validated – fusion rate data support (91‑96%)

Frequently Asked Questions (FAQ)

1. What is the main difference between an expandable cage and a traditional static cage?

An expandable cage is inserted at a lower initial height and then expanded to the desired height within the disc space. This design reduces nerve root retraction and allows more precise restoration of disc height and segmental lordosis. Traditional static cages require impaction at the final height, which may increase insertion difficulty.

2. What is Tritanium technology?

Tritanium is Stryker's proprietary high‑porosity titanium material manufactured using AMagine™ 3D printing technology. It features irregular, interconnected pores designed to mimic the morphology of cancellous bone and promote bone ingrowth and biological fixation.

3. Does the expandable cage have subsidence risk?

Biomechanical studies show subsidence depth is significantly correlated with bone density. Under the same expansion torque, low bone density (e.g., 5 PCF) shows subsidence of approximately 2.3 mm, while high bone density (20 PCF) shows approximately 1.1 mm. Surgeons should select appropriate sizes based on bone quality and exercise caution.

4. What is the fusion rate of this cage?

Clinical data shows fusion rates of 91‑96% with Tritanium cages at 12 months. Single‑cage fusion rate is 91%, and dual‑cage fusion rate is 96%.

5. Is the cage MRI compatible?

Titanium alloy implants are MR conditional. Please refer to the product instructions for specific MRI safety information.

6. What size options are available?

Multiple footprint sizes are available, with a height range of 8‑14 mm and lordotic angle options of 0°, 6°, and 12° (including a 12° hyper‑lordotic option).

7. How does the cage prevent migration?

The cage features precision‑angled serrations with solid tips, designed to provide bi‑directional anti‑migration capacity and maximize endplate contact surface area.

8. Which surgical approaches are indicated for this cage?

It is primarily indicated for posterior lumbar interbody fusion (PLIF) and transforaminal lumbar interbody fusion (TLIF).

9. Where can I get surgical technique manual or pricing information?

Please contact your local Stryker distributor or visit the official website. Complete surgical technique guides, catalogs, and quotations are available upon request.