In peripheral nerve injuries—common in the hands, fingers, arms, or legs after accidents or surgeries—surgeons typically reconnect the nerve ends using microsurgery with extremely fine sutures, a complex procedure that demands great precision and can cause additional tissue trauma. The new system replaces these sutures with two components: A 3D-printed, bioabsorbable, flexible sleeve or chamber that aligns the nerve ends. A light-activated liquid polymer, applied around the device and hardened in seconds by a controlled light source. The result is a stable circumferential seal that holds the nerve in position while the tissue naturally regenerates its connections.

Tissium's technology platform emerged from research in the laboratories of:

• Robert Langer
• Jeffrey M. Karp
• Maria Pereira

The core material belongs to a family of polymers derived from poly(glycerol sebacate acrylate), designed to be:

1. flexible
2. Biocompatible
3. photoactivatable
4. completely resorbable over time
This means that the implant does not remain permanently in the body.

According to clinical data released by the company and subsequently published, a prospective study in patients with digital nerve injuries showed:

• technical success of the procedure in all treated cases
• functional recovery of mobility of the injured finger
• absence of pain at 12-month follow-up

Although the results are promising, experts point out that larger and comparative studies against conventional microsurgery will still be necessary.

Peripheral nerves have a limited capacity for regeneration, and their repair depends on proper alignment. If reconnection fails, the patient may suffer from: loss of sensation, neuropathic pain, muscle weakness, and permanent functional disability. Reducing surgical trauma and simplifying the technique could improve outcomes and broaden access for non-ultra-specialized surgeons.

Tissium reported that the same programmable polymer platform could be applied in cases such as cardiovascular sealing, gastrointestinal hernia repair, soft tissue reconstruction, and complex surgical closures. This would make the 2025 authorization the first step in a new generation of “smart surgical adhesives.” The FDA authorized the first light-activated bioabsorbable system for repairing peripheral nerves without traditional sutures, developed by Tissium from research originating at MIT and Harvard-affiliated hospitals. Rather than completely replacing all sutures, the innovation initially targets specific cases of peripheral nerve surgery, where it could reduce complexity, operating time, and additional tissue damage.