Posterior Lumbar Interbody Fusion (PLIF) Surgery in Los Angeles

Posterior lumbar interbody fusion, abbreviated PLIF, is a type of spinal fusion performed through an incision in the lower back.

The surgeon removes the damaged intervertebral disc and inserts one or more cages or spacers into the empty disc space. These implants restore disc height and contain bone-graft material that encourages the adjacent vertebrae to heal together.

Screws and rods are usually added to stabilize the spinal segment while the fusion develops. The surgeon may also remove part of the lamina or other tissue to reach the disc and relieve pressure on nearby nerves.

PLIF differs from transforaminal lumbar interbody fusion, or TLIF, in how the disc space is accessed. PLIF generally approaches the disc more centrally from both sides, while TLIF uses a more angled approach from one side and may require less movement of the nerve roots.

PLIF may be used to treat lumbar conditions involving disc damage, instability, deformity, or nerve compression, including:

• Lumbar degenerative disc disease
• Spondylolisthesis
• Lumbar spinal stenosis with instability
• Recurrent herniated discs
• Degenerative scoliosis
• Loss of disc height
• Lumbar spinal instability
• Failed previous lumbar surgery
• Nerve compression associated with an unstable spinal segment

PLIF is generally considered when a specific structural problem corresponds with the patient’s symptoms and nonsurgical treatments have not provided adequate relief.

Potential candidates may experience persistent lower-back pain, leg pain, numbness, weakness, or difficulty standing and walking because of a damaged or unstable lumbar segment.

General candidacy considerations include:

• Imaging that confirms disc degeneration, instability, slippage, or nerve compression
• Symptoms that correspond with the affected spinal level
• Insufficient improvement with physical therapy, medication, injections, or other conservative care
• Adequate bone quality to support cages and screws
• General health suitable for anesthesia and surgery
• Ability to follow postoperative activity restrictions
• Realistic expectations about fusion and recovery

Bone quality, diabetes, nutrition, body weight, previous spine surgery, and the number of levels being treated may affect healing and surgical risk.

Nicotine use is especially important because it can delay wound healing and interfere with the new bone growth required for a successful fusion. Patients may be required to stop smoking, vaping, and other nicotine use before surgery and throughout recovery.

Before Surgery

Before PLIF, the surgical team reviews the patient’s symptoms, medical history, medications, previous treatments, and diagnostic imaging.

Preparation may include:

• Physical and neurological examination
• Lumbar X-rays, MRI, or CT imaging
• Blood tests and medical clearance
• Bone-density evaluation when appropriate
• Medication and supplement review
• Instructions regarding blood thinners
• Nicotine cessation
• Fasting before anesthesia
• Arranging transportation and help at home

Patients should not stop prescribed medication unless directed by their medical team. It is also important to disclose previous spine surgery, bleeding conditions, allergies, and reactions to anesthesia.

During Surgery

PLIF is typically performed under general anesthesia. The surgeon makes an incision in the lower back and moves the surrounding muscles aside to reach the spine.

The procedure generally involves:

1. Confirming the correct lumbar level using imaging.
2. Removing part of the lamina when needed for access and decompression.
3. Moving the nerve roots carefully to reach the damaged disc.
4. Removing the disc and preparing the disc space.
5. Inserting bone-filled cages or spacers between the vertebrae.
6. Placing screws and rods to stabilize the treated level.
7. Confirming implant position and spinal alignment.
8. Closing the incision.

PLIF may be performed through a traditional open incision or, in selected cases, with smaller incisions and specialized retractors. The safest approach depends on the condition, anatomy, previous surgery, and number of levels being treated.

Patients are usually encouraged to stand and begin walking soon after surgery. Hospital stays vary, although Cleveland Clinic notes that some patients remain for approximately one or two days following PLIF.

Recovery instructions may include:

• Taking short, frequent walks
• Keeping the incision clean and dry
• Taking medication as prescribed
• Avoiding heavy lifting, bending, and twisting
• Wearing a lumbar brace when recommended
• Remaining nicotine-free
• Attending follow-up examinations and imaging
• Beginning physical therapy when approved

Many patients resume basic daily activities within several weeks. Return to work depends on the number of levels treated, symptoms, and the physical demands of the job.

The patient may feel better before the bones have fully fused. Activity should therefore be increased according to the surgeon’s instructions rather than pain levels alone. Physical therapy may focus on walking, posture, core strength, flexibility, and safe lifting mechanics.

Potential complications of PLIF include:

• Infection
• Bleeding or blood clots
• Reaction to anesthesia
• Dural tear and spinal-fluid leakage
• Nerve injury
• New or worsening pain, numbness, or weakness
• Implant movement or settling
• Hardware loosening or breakage
• Failure of the vertebrae to fuse
• Persistent or recurrent symptoms
• Degeneration at nearby spinal levels
• Need for additional surgery

Because PLIF requires access near the spinal nerves, nerve-root movement and injury are specific considerations. The cage may also move or place pressure on a nerve, although these complications are uncommon.

Indicators of a successful outcome may include:

• Reduced lower-back or leg pain
• Improved standing and walking tolerance
• Improved strength or sensation
• Greater spinal stability
• Maintained or improved alignment
• Stable cages, screws, and rods
• Progressive bone growth across the treated level
• Improved ability to work and perform daily activities

PLIF cannot guarantee complete pain relief. Results depend on the underlying diagnosis, correct identification of the symptomatic level, bone quality, overall health, and adherence to postoperative instructions.