Table 1.

European Wrist Arthroscopy Society (EWAS) Classification of Scapho-Lunate Injuries (Messina et al.: The EWAS Classification of Scapholunate Tears An anatomic Arthroscopic study)¹⁹

Stage I	No Passage of the probe in SL space, but Synovitis
Stage IIA	Volar passage in the SL space without widening
Stage IIB	Dorsal passage in the SL space without widening
Stage IIC	Complete passage in e the SL space without widening
Stage IIIA	Volar partial widening at dynamic instability test from MC joint (volar instability)
Stage IIIB	Dorsal partial widening at dynamic instability test from MC joint (dorsal instability)
Stage IIIC	Complete widening of the space at dynamic test
Stage IV	Gap with passage of the arthroscope from MC to RC joint