Rethinking back pain research

25 June 2026

The AO Research Institute (ARI) plays a central role in advancing musculoskeletal care through focused research and translational innovation. Its work supports the development of improved diagnostics, personalized treatments, and regenerative solutions aligned with clinical needs. 

A key area of focus is the development of bioreactor systems and in vitro models, which replicate physiological conditions of bone, cartilage, and intervertebral discs. These models allow researchers to evaluate new therapeutic approaches under controlled, clinically relevant conditions, helping bridge the gap between laboratory research and patient care. 

In parallel, the institute is advancing biomedical development and smart orthopaedics. The AO Fracture Monitor enables continuous, objective monitoring of bone healing without repeated imaging. Clinical studies indicate its potential to support prediction of healing outcomes and fixation failure, contributing to more individualized treatment strategies. 

The ARI is also developing tissue-specific biomaterials, including porous scaffolds for bone, hydrogels for cartilage, and injectable systems for intervertebral discs. Complementary work on local antibiotic drug delivery systems aims to enhance therapeutic efficacy while minimizing systemic effects. 

To ensure clinical relevance, the ARI follows a structured translational pathway—from in vitro validation to preclinical testing and clinical readiness. This approach supports safety, quality, and alignment with regulatory requirements. 

Through these efforts, the ARI contributes to advancing musculoskeletal care, leading to more validated solutions, fewer complications, and better quality of life for patients worldwide. 

 

Learn more about the ARI’s research programs: 

Regenerative Orthopaedics 
Biomedical Development 
Preclinical Services

Entire intervertebral discs—obtained locally from bovine tails shortly after slaughter—are cultured for several weeks under carefully controlled nutrition, temperature, humidity, and pH while being mechanically stimulated. During experiments the discs remain biologically viable, preserving cellular activity, tissue structure and mechanical properties.  

This approach allows the ARI’s researchers to observe how disc cells and tissues respond over time to different loading scenarios, from physiological motion to potentially harmful patterns.  

From mechanical stress to pain signals

One of the team’s key research questions is how mechanical overload may translate into pain. In a recent study that received the ISSLS Prize 2026 for Basic Science, discs exposed to dynamic multiaxial loading showed region‑specific inflammatory and catabolic responses, particularly in the outer annulus fibrosus. When nerve cells were exposed to molecules released by these loaded discs, they exhibited signs of neural sensitization.  

In simple terms, this means that when the disc is exposed to too much or the “wrong” kind of movement—such as repeated bending, twisting, or compression—it begins to release chemical signals. These signals can “irritate” nearby nerve cells, making them more sensitive and more likely to send pain signals to the brain, even before visible damage occurs. 

Such findings help explain why certain movement patterns may provoke pain even before structural damage is visible on imaging. 

In the longer term, this research could help clinicians better identify which types of mechanical stress are harmful, refine rehabilitation strategies, and guide the development of targeted therapies that intervene earlier in the disease process. By linking how the spine moves to how pain develops, these models bring us closer to treatments that address the underlying causes of back pain—not just its symptoms.