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Table 1 Highet grading

From: Subjective and qualitative assessment of neural disturbance after inferior alveolar nerve transposition for dental implant placement

Stage 0 Complete sensory loss
Stage 1 Advent of deep pain
Stage 2 Some degree of tactile recovery and pain on superficial skin
Stage 2+ Emergence of hyperalgesia and complete tactile recovery and pain
Stage 3 Recovery of tactile sensation without pain; hyperalgesia disappearance
Stage 3+ Restoration of position sense, to some extent, with 2-point discrimination (2PD: 6–15 mm)
Stage 4 Full sensory recovery (2PD: 2–6 mm)