Lumbar Interbody Fusion Techniques and Clinical Outcomes
Summary
Lumbar interbody fusion encompasses a range of surgical approaches designed to stabilise degenerative or unstable spinal segments by inserting a structural spacer—or cage—between adjacent vertebral bodies and promoting bony fusion. Techniques vary by surgical corridor: anterior (ALIF), posterior (PLIF), transforaminal (TLIF), lateral transpsoas (LLIF or XLIF) and oblique lateral (OLIF). Each approach balances exposure, invasiveness and risk to neurovascular structures. Recent innovations include patient-specific, 3D-printed cages with porous architectures to enhance bone ingrowth and reduce subsidence, and novel endoscopic or single-position workflows to streamline operating time. Finite element analyses have clarified how material choice and cage geometry affect segmental biomechanics. Clinical studies consistently report high fusion rates, improvements in pain and function, and reduced hospital stay, though technique-specific complications—such as neural irritation with lateral approaches or implant subsidence—remain areas of active investigation. Overall, procedure selection is guided by pathology, patient anatomy and surgeon expertise, with a trend towards minimally invasive and customised solutions that optimise both biomechanical stability and clinical recovery.
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Lumbar Interbody Fusion Techniques and Clinical Outcomes publication trend
The graph below shows the total number of articles in lumbar interbody fusion techniques and clinical outcomes across all publications each year (not limited to Nature Index journals).
Technical terms
Lumbar interbody fusion: Surgical technique inserting a spacer between lumbar vertebrae to achieve stabilisation and bone fusion.
Oblique lateral interbody fusion (OLIF): Minimally invasive approach accessing the disc space via an oblique corridor anterior to the psoas muscle.
Transforaminal lumbar interbody fusion (TLIF): Posterior approach inserting a cage through the neural foramen to restore disc height and alignment.
Extreme lateral interbody fusion (XLIF/LLIF): Lateral transpsoas approach that allows placement of larger implants with reduced muscle disruption.
PEEK: Polyetheretherketone, a radiolucent polymer implant material with elastic modulus closer to bone.
Porous titanium scaffold: Titanium implant featuring controlled porosity to encourage osseointegration and distribute load.
Cage subsidence: Sinking of an interbody implant into the adjacent vertebral endplate, potentially compromising fusion and alignment.
Finite element analysis: Computational method simulating mechanical behaviour of spinal constructs under physiological loads.
References
- Designing an anatomical contour titanium 3D-printed oblique lumbar interbody fusion cage with porous structure and embedded fixation screws for patients with osteoporosis. International Journal of Bioprinting (2023).
- Effect of Interbody Implants on the Biomechanical Behavior of Lateral Lumbar Interbody Fusion: A Finite Element Study. Journal of Functional Biomaterials (2023).
- Open versus minimally invasive TLIF: literature review and meta-analysis. Journal of Orthopaedic Surgery and Research (2019).
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