The Role of Current Techniques and Concepts in Peripheral Nerve Repair

Table 1

Neurosensory impairment classification according to Sunderland and Seddon.

Classification of nerve injury
Sunderland	Seddon	Injury	Neurosensory impairment	Recovery potential
I	Neuropraxia	Intrafascicular oedema, conduction block	Neuritis, paresthesia	Full (1 day to 1 week)
		Possible segmental demyelination	Neuritis, paresthesia	Full (1 to 2 months)
II		Axon severed, endoneurial tube intact	Paresthesia, episodic dysesthesia	Full (2 to 4 months)
III	Axonotmesis	Endoneurial tube torn	Paresthesia, dysesthesia	Slow, incomplete (12 months)
IV		Only epineurium intact	Hypoesthesia, dysesthesia, and neuroma formation	Neuroma in continuity
V	Neurotmesis	Loss of continuity	Anaesthetic, intractable pain, and neuroma formation	None
VI		Combination of above	Combination of above	Unpredictable