Minimally Invasive TLIF (Lumbar Fusion)
A TLIF joins two vertebrae in the low back into one solid segment while relieving pressure on the nerves. The minimally invasive version does the same operation through small incisions with tubular retractors and image guidance, sparing the back muscles that an open approach would strip away. Fusion is not the answer for most back pain, but when a segment is unstable or a nerve cannot be freed without destabilizing it, it is the right tool.
How the operation works
Through small incisions on either side of the low back, tubular retractors are placed between the muscle fibers rather than cutting them. The nerve is decompressed and the disc is removed from one side (the transforaminal approach). A spacer packed with bone graft is placed in the disc space to restore height and open the nerve openings, and screws and rods are placed through the same small incisions to hold the level steady while the bone heals. Dr. Michael uses intraoperative navigation or robotic guidance to plan and confirm each screw's path, which improves accuracy and reduces radiation exposure.
Who needs a fusion
The clearest indications are instability, such as a slipped vertebra that moves on bending X-rays, and situations where the nerves cannot be adequately freed without removing enough bone to destabilize the segment. Recurrent disc herniations and deformity are other reasons. Fusion for disc-related back pain alone is considered selectively, and Dr. Michael is candid that results in that group are less predictable than for nerve-related symptoms. A fusion that is not needed adds recovery without adding benefit, so patient selection is where most of the thought goes.
Recovery
Patients walk the day of or the day after surgery and usually go home in one to two days. Light activity and walking are encouraged from the start; bending, lifting, and twisting are limited during the early weeks. Desk work resumes in two to four weeks and physical work in about three months. The bone takes six to twelve months to fuse fully, and follow-up X-rays track it. Not smoking, controlling blood sugar, and treating osteoporosis each meaningfully improve the chance of a solid fusion.
Common questions
Is minimally invasive fusion as strong as open fusion?
Yes. The implants and the fusion are the same. The difference is in how the spine is reached, with less damage to the muscles along the way.
Will I be able to bend after a fusion?
A one-level lumbar fusion removes a small share of total motion, and most patients do not notice it in daily activities. Most of the low back's bending comes from the hips and the remaining levels.
What is a lateral (XLIF/LLIF) or anterior (ALIF) fusion?
These reach the disc from the side or the front instead of the back and are useful for certain levels and for deformity correction. Dr. Michael performs these approaches and chooses based on the level, the anatomy, and the goals of the operation.
Does a robot do the surgery?
No. The robot and navigation system guide the surgeon's placement of screws along a plan made from your imaging. The surgeon performs every step of the operation.