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| Number of rats | Treatment of the segmental 15 mm loss∗ | Experimental length in time |
|---|---|---|
| 8 | Control operated and further implanted with autogenous peripheral nerve graft | 90 days |
| 8 | Bridged with standard tube only | 90 days |
| 8 | Bridged with standard tube and filled with gel vehicle including HA only | 90 days |
| 8 | Bridged with standard tube filled with GRG | 90 days |
*In rats model, regeneration within empty tube is possible when gap is up to 7 mm long.
