✓

Medically reviewed by Jacob B. Archer, M.D., MBA — Board-certified neurosurgeon · Neuroscience Specialists · Oklahoma City, OK · Updated May 15, 2026 · For educational purposes only.

What Is Posterior Lumbar Fusion?

Posterior thoracic and lumbar fusion stabilizes one or more spinal segments using pedicle screws and connecting rods placed through the back. Bone graft is laid along the posterior elements to promote a solid fusion between the vertebrae. Nerve decompression through laminectomy or foraminotomy is commonly performed at the same time. Depending on your anatomy and the goals of surgery, your surgeon may also place an interbody device (TLIF or PLIF) — a bone graft cage positioned inside the disc space to restore height, increase fusion surface area, and add anterior column support.

Common Indications

Degenerative disc disease causing chronic low back or leg pain
Spondylolisthesis — one vertebra slipping forward over another
Spinal stenosis with instability requiring decompression and stabilization
Recurrent disc herniation after prior surgery
Post-laminectomy instability
Adjacent segment disease above or below a prior fusion
Thoracic or lumbar instability from degeneration, trauma, or tumor

Posterior lumbar fusion is a well-established procedure supported by decades of evidence. Addition of an interbody device (TLIF/PLIF) improves fusion rates and restores sagittal alignment in select patients. A meta-analysis and systematic review of 67 studies found an overall mean fusion rate of approximately 93% (95% CI 92–95%) across lumbar interbody fusion techniques for degenerative spine disease (Piazzolla et al., Musculoskelet Surg 2020).

Alternatives to Surgery

Surgery is one option for managing your condition. Not all alternatives are appropriate for every patient — their suitability depends on your specific diagnosis, symptoms, and prior treatment history.

Continued conservative management — physical therapy, core strengthening, chiropractic care, activity modification
Epidural steroid injections or selective nerve root blocks
Oral medications — anti-inflammatory agents, neuropathic pain medications
Spinal cord stimulation — for chronic pain management in selected patients
Observation — accepting current level of function with symptom monitoring
No surgery — with understanding that instability or nerve compression may persist or progress

Choosing not to have surgery is always an option. Your surgeon has discussed what you can expect if you decide not to proceed, including the possibility that symptoms may persist, worsen, or in some cases improve without surgery.

What Happens During Surgery

Performed under general anesthesia · Typically 2–4 hours depending on levels and extent of decompression · Neurophysiologic monitoring used for thoracic cases

You are positioned face-down on the operating table.
An incision is made along the back over the levels to be fused. The approach may be open or minimally invasive depending on your anatomy.
Muscles are carefully moved aside to expose the posterior spine at the target levels.
Pedicle screws are placed bilaterally at each level to be fused, using fluoroscopic X-ray or CT navigation for accuracy.
If nerve decompression is needed, a laminectomy or foraminotomy is performed to relieve pressure on the spinal cord or nerve roots.
Connecting rods are shaped and secured to the pedicle screws, stabilizing the construct.
Bone graft — your own bone from surgery, donor bone (allograft), or biologic agents — is placed along the posterior elements to promote fusion.
The wound is closed in layers. A drain may be placed for 24–48 hours.

When an interbody device is used (TLIF/PLIF): Before rod placement, additional steps are performed: the disc material is removed through the foramen (TLIF) or spinal canal (PLIF), and a bone graft cage — made from PEEK, titanium, or carbon fiber — is placed into the disc space. This restores disc height and provides a large surface area for fusion, combined with the posterior construct.

Risks of Surgery

About This Risk List
The risks listed below represent those most associated with this procedure. This list is not all-inclusive. All surgical procedures carry the potential for rare, unforeseen, or individualized complications that cannot be fully anticipated in advance and not all complications, both medical and surgical, can be discussed as the list would be infinite. Your surgeon has discussed the risks most relevant to your specific situation.

General Surgical Risks

Stroke
Heart attack
Paralysis
Death
Urinary retention
Vascular injury
Corneal abrasion or blindness
Ulnar, median, or brachial plexus neuropathy from positioning
Adverse anesthesia reaction
Pneumonia or urinary tract infection
Blood clots (DVT or pulmonary embolism)
Bleeding or blood transfusion
Infection — superficial or deep wound, epidural abscess, meningitis

Procedure-Specific Risks

Nerve root and/or spinal cord injury — sensory changes, weakness, or paralysis (temporary or permanent)
Dural tear with spinal fluid leak
Hardware failure — pedicle screw and/or rod fracture, loosening, or malposition
Failed fusion (pseudarthrosis)
Adjacent segment disease above or below construct
Loss of bowel, bladder, or sexual function
Wrong level
Bone fracture — vertebral, pelvic, or sacral — requiring additional surgery or bracing
Hardware prominence or pain — may require hardware removal as a separate procedure
Epidural fibrosis (scar tissue) causing persistent or new symptoms
Symptoms may be unchanged, different, new, or worse after surgery
Additional surgery for any noted or unforeseen complications

Cauda Equina Syndrome — Medical Emergency: New loss of bowel or bladder control combined with saddle-area numbness is a rare but serious emergency. Go to the Emergency Room immediately.

Smoking and Nicotine: Nicotine is the single most modifiable risk factor for failed spinal fusion. Smoking, vaping, patches, gum, or chewing tobacco reduces blood flow to the spine and can prevent fusion from occurring. Cessation before and after surgery is strongly recommended.

Outcomes & Expectations: Surgery aims to relieve nerve compression and stabilize the spine where applicable. It does not guarantee relief of all pain or symptoms. Individual outcomes vary based on diagnosis, health status, duration of symptoms, and other factors. No specific result has been promised or guaranteed.

Your Hospital Stay

Typically 1–3 nights. You will be discharged when pain is controlled with oral medication, you can walk safely, and bowel function has returned. A foley catheter is placed in the OR and typically removed the day of surgery or the morning of post-op day 1. Assisted sitting, standing, and first steps begin when medically stable.

Recovery at Home

No external brace is typically required. The pedicle screw-and-rod construct provides immediate internal stabilization. Your surgeon will advise if one is recommended for your specific case.

Timeframe	Activity Guidelines
Weeks 1–2	Short, frequent walks. No sitting more than 20–30 minutes at a time. No driving on opioids.
Weeks 2–6	Gradually increase walking distance daily. No lifting more than 10 lbs for the first month. Desk work with frequent breaks if cleared.
After 6 weeks	Activity increased with surgeon guidance at your 1-month visit.
Months 2–3	Return to most non-physical activities. Progressive activity based on clinical assessment.
Months 3–6	Return to more demanding activities as fusion advances.
Months 6–12+	Return to heavy work or sport with confirmed fusion and surgeon clearance.

Spine Precautions (first 6 weeks): B — No Bending at the waist (ok to carefully bend to sit or use the toilet). L — No Lifting more than 10 lbs. T — Avoid Twisting. Use the log-roll technique to get in and out of bed.

Walking is your most important recovery exercise. Begin as soon as safely able. Days 1–7: short walks 5–10 min several times daily. Week 2–4: 15–30 min once or twice daily. After 1 month: increase as tolerated.

Avoid NSAIDs after fusion surgery. Do not take ibuprofen (Advil, Motrin), naproxen (Aleve), aspirin for pain, or any prescription anti-inflammatory for at least 3 months after fusion. These medications interfere with bone healing and can prevent fusion from occurring.

Blood clot warning: Walk every day. Avoid long periods of sitting or lying still. Stay well hydrated. Go to the ER immediately if you develop calf pain, leg swelling, redness, chest pain, or shortness of breath.

Return to Work — Typical Timelines

Work Type	Typical Timeline	Examples
Sedentary / Desk Work	2–4 weeks	Office, computer, phone, remote work
Light Duty	6–8 weeks	Standing, walking, lifting 10–20 lbs
Moderate / Heavy Labor	3–6+ months (fusion-dependent)	Construction, trades, patient care, heavy lifting

All timelines are estimates. Your surgeon will provide formal work release at follow-up based on your progress.

Wound Care

Keep the incision clean and dry for the first 48–72 hours after discharge.
You may shower after 48 hours — allow water to run gently over the area. Do not scrub.
Do not submerge in a bathtub, pool, or hot tub until cleared by your surgeon (typically 4–6 weeks).
Steri-strips should fall off on their own over 7–10 days. Do not remove them.
Dissolvable sutures do not need removal. External sutures or staples are removed at your 2-week visit.
Monitor for signs of infection and call our office promptly if you have concerns.

Medications at Discharge

Opioid pain medication — Use only as needed for pain not controlled by other measures. Do not drive, operate machinery, or consume alcohol while taking opioids. Short-term use only (1–2 weeks typical).
Muscle relaxer — Helps reduce painful muscle spasm. May cause drowsiness.
Stool softener (docusate) — Take while using opioids to prevent constipation. Drink 6–8 glasses of water daily.
Acetaminophen (Tylenol) — Do not exceed 3,000 mg/day. Do not take additional Tylenol-containing products concurrently.

Opioids are for short-term use only — typically 1–2 weeks. Taper as pain allows. Do not request early refills. Dispose of unused medication safely at a pharmacy take-back program.

Follow-Up Schedule

Visit	What to Expect
2 Weeks	Wound check, suture or staple removal, early recovery questions
1 Month	Clinical assessment, neurological check, activity advancement, driving clearance
3 Months	Fusion progress review, return-to-work discussion, address ongoing symptoms
9–12 Months	Late follow-up: confirm final outcome; imaging if symptoms or concerns arise

Warning Signs

For urgent concerns outside of office hours, call (405) 748-3300 — our answering service is available 24 hours a day, 7 days a week.

Warning Sign	What To Do
Fever above 101.5°F	Call our office immediately
Increasing redness, warmth, swelling, or discharge at the incision	Call our office immediately
Severe or rapidly worsening pain not controlled by medication	Call our office immediately
New or worsening weakness or numbness in arms or legs	Go to the ER or call our office immediately
Loss of bowel or bladder control	Go to the Emergency Room — urgent
Calf pain, swelling, or redness (possible blood clot)	Go to the Emergency Room immediately
Difficulty breathing or chest pain	Call 911 immediately
New or worsening leg weakness or foot drop	Go to the ER or call our office immediately
Sudden significant increase in back pain	Call our office — possible hardware concern

The information on this page is for general educational purposes only and does not constitute medical or legal advice. Consult your surgeon regarding your specific condition, treatment plan, and recovery.

Posterior Lumbar Fusion