Interbody fusion cage

A medical device used in spinal fusion surgeries

Interbody Fusion Cage

An interbody fusion cage is a medical device used in spinal fusion surgeries to provide stability to the spine and facilitate the fusion of two or more vertebrae. These cages are typically made from materials such as titanium, carbon fiber, or polyetheretherketone (PEEK) and are designed to be placed between the vertebrae in the intervertebral disc space.

Interbody fusion cage for cervical spine

Purpose

The primary purpose of an interbody fusion cage is to maintain the proper spacing and alignment of the vertebrae while the bone graft material placed within the cage facilitates the growth of new bone. This process ultimately leads to the fusion of the vertebrae, stabilizing the spine and alleviating pain caused by conditions such as degenerative disc disease, spondylolisthesis, or spinal stenosis.

Design and Materials

Interbody fusion cages come in various shapes and sizes to accommodate different areas of the spine, such as the cervical, thoracic, and lumbar regions. The design of these cages often includes a hollow center where bone graft material is placed. The surface of the cage may be textured or coated to promote bone growth and integration with the surrounding vertebrae.

Common materials used in the construction of interbody fusion cages include:

• Titanium: Known for its strength and biocompatibility, titanium cages are often used in spinal surgeries.
• Carbon Fiber: Lightweight and radiolucent, carbon fiber cages allow for better imaging during follow-up examinations.
• PEEK: A polymer that is radiolucent and has mechanical properties similar to bone, making it a popular choice for interbody fusion cages.

Surgical Procedure

The surgical procedure for placing an interbody fusion cage typically involves the following steps:

1. Accessing the Spine: The surgeon makes an incision to access the affected area of the spine. The approach can be anterior, posterior, or lateral, depending on the location of the fusion.

2. Disc Removal: The intervertebral disc is removed to create space for the cage.

3. Cage Placement: The interbody fusion cage, filled with bone graft material, is inserted into the disc space.

4. Stabilization: Additional hardware, such as rods and screws, may be used to stabilize the spine while fusion occurs.

5. Closure: The incision is closed, and the patient is monitored during recovery.

Interbody fusion cage for L5-S1

Recovery and Outcomes

Recovery from spinal fusion surgery with an interbody fusion cage varies depending on the individual and the extent of the surgery. Patients may experience pain relief and improved function, but the fusion process can take several months to complete. Physical therapy is often recommended to aid in recovery and improve mobility.

Complications

As with any surgical procedure, there are potential risks and complications associated with the use of interbody fusion cages. These may include:

• Infection
• Nerve damage
• Non-union or failure of the vertebrae to fuse
• Migration or subsidence of the cage

Related Pages

• Spinal fusion
• Degenerative disc disease
• Spondylolisthesis
• Spinal stenosis