What Makes the Anterior Approach Anatomically Distinct

In a posterior or posterolateral fusion approach — TLIF or PLIF — the surgeon accesses the lumbar disc from behind, working around or through the posterior musculature and neural structures to reach the anterior disc space. This gives access to the disc, but the approach limits how much disc material can be removed and constrains the size of the interbody cage that can be placed from that angle. ALIF approaches the lumbar spine from the front. Through a retroperitoneal approach — an incision in the lower abdomen accessing the space in front of the spine without entering the abdominal cavity — the surgeon accesses the anterior lumbar disc directly.

This direct anterior access allows complete removal of the disc material, placement of a large interbody cage that maximally restores disc space height and lumbar lordosis, and correction of sagittal alignment in ways that posterior approaches cannot achieve with the same degree of precision. The anterior access also avoids the posterior musculature entirely. Because ALIF does not dissect through the erector spinae and multifidus muscles that posterior approaches require, the post-operative back pain and muscle healing that follow posterior approaches are largely avoided. For patients who have previously had posterior lumbar surgery, ALIF approaches the spine through virgin tissue anteriorly — which avoids the scar tissue and anatomical distortion that makes revision posterior surgery technically demanding.

The Anatomy-First Decision for Anterior Approach

ALIF is indicated when the anatomy specifically benefits from anterior access. The clearest indications include:

  • Severe disc space collapse requiring restoration of lordosis and disc height that posterior cage placement cannot adequately achieve
  • L5-S1 pathology — the anterior approach provides the most direct and technically favorable access to the lumbosacral junction, where posterior approaches can be limited by the sacral angle and iliac crest anatomy
  • Patients who have previously had posterior lumbar surgery at the affected level, where anterior virgin access avoids revision surgery through scar tissue
  • Sagittal imbalance correction, where the anterior column needs to be reconstructed to restore lumbar lordosis

Patients who come to our Mullica Hill office having been told they need posterior fusion by another provider sometimes have anatomy that would be better served by ALIF. We review imaging with fresh eyes and recommend the approach that the specific anatomy supports.

Why the Inspira Facility Environment Matters for ALIF

ALIF requires collaboration with a vascular surgeon, who provides the retroperitoneal exposure — mobilizing the great vessels (the aorta and vena cava, or at L5-S1, the iliac vessels) to allow safe access to the anterior disc space. This is not a complication; it is the planned operative approach. The vascular surgeon opens and closes the exposure, and the spine surgeon performs the disc preparation and implant placement within that window. Performing ALIF safely requires a facility where vascular surgery expertise and the full operative support infrastructure are available. Inspira Medical Center Mullica Hill provides that environment — the operative team, vascular surgery coordination, intraoperative monitoring, and post-operative care capabilities that a procedure of this complexity requires. For Mullica Hill patients already within the Inspira Health Network, coordination with the vascular surgery team at Inspira occurs within a system where their records and history are accessible.

Background media

Your Surgical Team at POA Mullica Hill

Rahul V. Shah

Dr. Rahul V. Shah, MD, FAAOS

Board-Certified Orthopaedic Spine Surgeon  |  Fellowship-Trained, UCSF  |  Chief Resident, Yale

Dr. Shah's spine fellowship at UCSF included anterior lumbar approaches, and he brings that training to the anatomical decisions he makes for Mullica Hill patients. His core principle for ALIF is anterior when the anatomy specifically benefits from it — not anterior as a default, not anterior to avoid posterior dissection for its own sake. When he recommends ALIF to a patient who has been quoted a posterior approach elsewhere, he explains the specific anatomical rationale: why the anterior approach will achieve better lordosis correction, better disc height restoration, or safer access given the prior surgical history. The decision is always anatomy-first.

  • FAAOS — Fellow, American Academy of Orthopaedic Surgeons
  • Spine Surgery Fellowship — University of California, San Francisco
  • Chief Resident — Yale University Orthopaedic Surgery
  • Faculty — Rowan University Medical School

View Full Profile

Joseph R. Zerbo male in white lab coat

Dr. Joseph R. Zerbo, DO

Board-Certified Orthopaedic Spine Surgeon  |  NASS Member  |  35+ Years in Southern NJ

Dr. Zerbo's approach to ALIF reflects the breadth of his experience with lumbar fusion over more than three decades. He is particularly attentive to the patient's experience of ALIF — the procedure looks and feels different from posterior surgery, with an abdominal incision that surprises some patients who expected back surgery. He spends time making sure Mullica Hill patients understand what to expect: why the incision is where it is, what the vascular surgeon's role is, and what the recovery looks like through an approach that avoids posterior muscle dissection. That conversation — grounded in his long experience with anterior procedures — is part of what makes the surgical experience less disorienting and recovery more predictable.

  • AOBOS Board-Certified — American Osteopathic Board of Orthopaedic Surgeons
  • NASS Member — North American Spine Society (since 1999)
  • Chief Resident — Kennedy Memorial Hospital / UMDNJ
  • Founder — Zerbo Spine, PA

View Full Profile

ALIF FAQs

Why would a spine surgery go through my abdomen instead of my back?

Does Inspira Medical Center have vascular surgeons available for ALIF?

I had posterior lumbar surgery years ago — does that affect whether I can have ALIF?

What is the recovery difference between ALIF and posterior fusion?

Why would a spine surgery go through my abdomen instead of my back?

Because the front of the lumbar spine provides more direct and complete access to certain disc levels — particularly L5-S1 — than a posterior approach can achieve. The anterior approach allows the surgeon to remove disc material completely, place a larger cage that restores disc space height and lumbar lordosis, and correct alignment issues that posterior cages cannot adequately address from behind. For the right anatomical indication, the anterior route produces a better structural result. The incision is in the lower abdomen rather than the back, and the abdominal muscles are retracted rather than divided — which is why back pain after ALIF is typically much less than after posterior approaches.

Does Inspira Medical Center have vascular surgeons available for ALIF?

Yes. ALIF requires a vascular surgeon to provide the retroperitoneal exposure — accessing the space in front of the spine by carefully mobilizing the great vessels. This is standard operative practice for ALIF, not a response to a problem. Inspira Medical Center Mullica Hill has vascular surgery expertise available for this coordinated approach. The vascular surgeon opens the exposure and closes after the spine portion of the procedure is complete.

I had posterior lumbar surgery years ago — does that affect whether I can have ALIF?

Prior posterior surgery is often one of the reasons ALIF is preferred rather than a contraindication to it. If you have had posterior lumbar surgery at a level that now requires revision or fusion, accessing that level from the front avoids the scar tissue, altered anatomy, and neural structure considerations that make revision posterior surgery technically demanding. The anterior approach accesses a segment of the spine that was not disturbed by prior surgery. We review prior operative reports and imaging to understand exactly what was done and how anterior access would work for your specific anatomy.

What is the recovery difference between ALIF and posterior fusion?

Because ALIF does not dissect through the posterior spinal muscles, the back pain that typically follows posterior fusion is substantially reduced. Patients often report less post-operative back soreness with ALIF than with TLIF or PLIF. The incision site and retroperitoneal dissection produce a different type of early soreness — some abdominal and hip flexor discomfort — that generally resolves over two to four weeks. The overall recovery arc and fusion timeline are similar to posterior fusion: early mobilization, graduated activity, and three to six months for structural fusion maturity.

Premier Orthopaedic Associates Mullica Hill - Inspira Hospital

Contact

(856) 690-1616

Hours of Operation

MON — FRI: 8:30AM - 5PM

Contact This Location
Contact us media
Accessibility: If you are vision-impaired or have some other impairment covered by the Americans with Disabilities Act or a similar law, and you wish to discuss potential accommodations related to using this website, please contact our Accessibility Manager at (856) 690-1616.
How can I help you?

Hey there, how can I help you?

Schedule a Visit Find a Provider Bill Pay
Contact Us