Lumbar Disc Replacement
ProDisc-L Certified Lumbar Artificial Disc Replacement in New Jersey.
Lumbar disc replacement is a surgical procedure in which a degenerated or damaged disc in the lower back is removed and replaced with an artificial implant designed to replicate the natural function of the disc — providing cushioning between the vertebrae, absorbing compressive forces, and allowing the spine to move naturally. It is the lumbar counterpart to cervical disc replacement, and like its cervical equivalent, it represents a motion-preserving alternative to spinal fusion for appropriately selected patients.
The appeal of lumbar disc replacement over lumbar fusion is straightforward. The lumbar spine, particularly the L4-L5 and L5-S1 levels, carries enormous compressive and rotational loads with virtually every movement the body makes. Fusing one of these levels eliminates painful motion at that segment, which is effective, but it also permanently transfers the mechanical demands of
the fused level to the discs above and below it. Over time, that increased demand can accelerate degeneration at adjacent levels, sometimes leading to further surgery years down the road. Lumbar disc replacement addresses the damaged disc while preserving the natural motion and load distribution of the lumbar spine, which reduces the mechanical stress on adjacent levels.
Lumbar disc replacement is a more specialized procedure than lumbar fusion, and fewer surgeons offer it with specific implant certification. Rishi N. Sheth, MD holds ProDisc-L
certification, one of the most rigorously studied lumbar disc replacement systems available, making him one of the few spine neurosurgeons in New Jersey qualified to offer this procedure with the level of training the ProDisc-L system requires.
The Critical Choice Between Motion Preservation and Fusion in the Lower Back.
The decision between lumbar disc replacement and lumbar fusion is one of the most consequential choices in lumbar spine surgery, and it deserves a thorough, honest conversation between surgeon and patient. At Spine Care New Jersey, Rishi N. Sheth, MD discusses both options with every eligible patient before making a recommendation.
Both procedures begin the same way. Through a small anterior abdominal incision, the spine is accessed from the front. The damaged disc is completely removed, and the disc space is prepared. At that point the procedures diverge. In lumbar fusion, bone graft and a structural implant called an interbody cage are placed in the disc space, followed by pedicle screws and rods from a posterior approach to compress and stabilize the vertebrae until they fuse. In lumbar disc replacement, the ProDisc-L implant is placed in the prepared disc space and anchored to the vertebral endplates, maintaining the space between the vertebrae and allowing continued movement at that level.
The evidence base for lumbar disc replacement has grown substantially over the past decade. Multiple FDA investigational device exemption studies and long-term follow-up data demonstrate that lumbar disc replacement achieves pain relief outcomes comparable to fusion for appropriate candidates at single-level L4-L5 or L5-S1 disease, with a lower rate of adjacent segment reoperation in long-term follow-up. These are meaningful advantages for younger and more active patients who face decades of continued spinal loading ahead of them.
Lumbar disc replacement is not universally superior to fusion. Fusion remains the more appropriate choice for patients with significant spinal instability, multi-level disease requiring treatment at more than two levels, prior adjacent level fusion, significant facet joint degeneration at the target level, or meaningful osteoporosis. The honest assessment of which procedure is right for a specific patient requires careful review of their imaging, their clinical presentation, their activity level, and their long-term goals — exactly what Dr. Sheth does during the consultation at Spine Care New Jersey.
Patient Selection Is Everything in Lumbar Disc Replacement.
Lumbar disc replacement is a procedure where patient selection has an enormous influence on outcome. When performed in the right patient, results are excellent and durable. When performed in the wrong patient, the implant may fail to provide the expected benefit or may develop complications that require revision surgery. Rishi N. Sheth, MD applies rigorous selection criteria before recommending lumbar disc replacement.
Ideal candidates for lumbar disc replacement share several characteristics. They have symptomatic degenerative disc disease at one or two lumbar levels, most commonly L4-L5 or L5-S1, that has not responded to a genuine trial of conservative treatment including physical therapy and pain management. Their primary complaint is discogenic lower back pain, meaning pain that originates from the damaged disc itself rather than from facet joint arthritis or spinal instability. They are generally between 18 and 60 years of age, are not significantly overweight, have adequate bone mineral density, and do not have conditions that would compromise implant integrity.
Imaging criteria are equally important. MRI must confirm that the disc degeneration is confined to one or two levels, that facet joint arthritis at those levels is not significant, that the vertebral endplates are intact and can support the implant, and that there is no significant segmental instability. The configuration of the lumbosacral junction and the relationship of the iliac crests to the L5-S1 disc space on imaging also influences whether disc replacement is technically feasible at that level.
For patients who have been evaluated elsewhere and told their only option is lumbar fusion, the free MRI review at Spine Care New Jersey offers the opportunity to have a ProDisc-L certified neurosurgeon assess whether disc replacement is genuinely a viable alternative before committing to a fusion.
What Lumbar Disc Replacement Involves and What to Expect During Recovery.
The Procedure
Lumbar disc replacement is performed under general anesthesia through an anterior approach, meaning through the abdomen rather than the back. The patient is positioned on their back. A
vascular surgeon often assists with the initial exposure, gently moving the major blood vessels of the abdomen to one side to access the front of the lumbar spine. This collaborative approach reflects the close proximity of the aorta, vena cava, and iliac vessels to the lumbar disc space and the importance of experienced vascular assistance in managing this exposure safely.
Once the spine is exposed, Rishi N. Sheth, MD removes the damaged disc completely, prepares the vertebral endplates, and sizes and positions the ProDisc-L implant precisely within the disc space. Intraoperative fluoroscopy confirms correct positioning, centering, and implant height before the incision is closed. A single-level procedure typically takes approximately 90 minutes to two hours.
Hospital Stay
Most lumbar disc replacement procedures involve a hospital stay of one to two nights. The anterior approach avoids the paraspinal muscles entirely, which means postoperative pain is typically less than after posterior lumbar fusion surgery.
Recovery Timeline
The first week focuses on wound healing and gentle mobilization. Walking begins within a day of surgery and is encouraged progressively from the outset. Most patients manage personal care independently within the first week.
Return to sedentary work typically occurs between two and four weeks for patients with desk-based occupations. More demanding physical work requires six to ten weeks. Physical therapy begins at four to six weeks and focuses on lumbar core strengthening and gradual return to full activity. Because lumbar disc replacement preserves motion, the rehabilitation program differs from post-fusion therapy and includes careful restoration of lumbar range of motion alongside stability training.
Return to vigorous physical activity, sports, and manual labor typically occurs between eight and twelve weeks, guided by symptom resolution and the findings at follow-up appointments with Dr. Sheth.
ProDisc-L Certified. ProDisc-C Certified. One of the Few in New Jersey.
Lumbar disc replacement is a procedure that requires a specific combination of training. The surgeon must be technically accomplished in the anterior retroperitoneal approach to the lumbar spine, experienced in the precise sizing and placement of the disc implant, and rigorous in
patient selection to avoid offering the procedure to patients whose anatomy or pathology makes them poor candidates. The ProDisc-L certification process is designed to ensure these standards are met before a surgeon uses the implant in clinical practice.
Rishi N. Sheth, MD is certified in the ProDisc-L lumbar disc replacement system, making him one of a limited number of spine neurosurgeons in New Jersey with this specific credential. He is also ProDisc-C certified for cervical disc replacement, making him one of the very few spine surgeons in the state with dual disc replacement certification in both the cervical and lumbar spine. This means patients with disc disease at any level of the spine have access to motion-preserving alternatives to fusion from a single, fellowship-trained surgeon.
For younger and more active patients who have been told they need a lumbar fusion and want to understand whether disc replacement is a realistic alternative for their anatomy, a consultation at Spine Care New Jersey provides exactly that assessment. Dr. Sheth will review the imaging, explain the candidacy criteria honestly, and give a clear recommendation — whether that is disc replacement, fusion, or continuation of non-surgical management.
Common Questions About Lumbar Disc Replacement at Spine Care New Jersey.
Most patients go home one to two days after lumbar disc replacement. Walking begins the day after surgery. Return to desk work typically occurs within two to four weeks. Physical therapy starts at four to six weeks. Return to more demanding physical activity and sport occurs at eight to twelve weeks. Because the anterior approach avoids the posterior muscles, early postoperative pain is generally less than after lumbar fusion. Dr. Sheth provides a specific timeline based on each patient’s procedure and activity requirements.
Long-term clinical data on lumbar disc replacement shows durable outcomes over ten to fifteen years of follow-up in appropriately selected patients. The ProDisc-L system used by Rishi N. Sheth, MD has one of the most extensively documented long-term safety and durability profiles of any lumbar disc replacement implant available. As with any implant, longevity is influenced by patient selection, surgical technique, and the ongoing mechanical demands placed on the spine. Dr. Sheth discusses realistic long-term expectations with every disc replacement candidate during consultation.
Lumbar disc replacement risks include those common to any lumbar spine surgery such as infection, bleeding, and nerve injury, along with anterior approach-specific risks including injury to the major abdominal vessels or damage to the sympathetic nerves which can cause retrograde ejaculation in male patients. Implant-specific risks include migration, subsidence, or loosening requiring revision. These complications are uncommon in properly selected patients operated on by experienced surgeons. Rishi N. Sheth, MD reviews all risks thoroughly during the preoperative consultation and uses a vascular surgery team for the abdominal exposure.
Lumbar disc replacement is a specialized procedure offered by a limited number of surgeons in New Jersey with specific implant certification. Rishi N. Sheth, MD at Spine Care New Jersey is ProDisc-L certified, placing him among the few spine neurosurgeons in the state qualified to offer lumbar disc replacement with this specific system. He is also ProDisc-C certified for cervical disc replacement, making him one of the very few surgeons in New Jersey with dual disc replacement certification in both the cervical and lumbar spine.
For carefully selected patients with single or two-level lumbar degenerative disc disease, disc replacement achieves comparable pain relief to fusion with the added benefit of preserved motion and lower rates of adjacent segment disease requiring future surgery. It is not appropriate for all patients. Those with significant facet arthritis, multi-level disease, spinal instability, or osteoporosis are better served by fusion. Rishi N. Sheth, MD reviews every
patient’s imaging and clinical picture individually and gives an honest recommendation based on which procedure is genuinely the better option for that specific patient