At 1 year after surgery , we observed that external fixation showed significantly better results than volar locking plates using the Green and O'Brien scores for range of motion ( 22.0 4.77 vs 19.89 5.05 ) , grip strength ( 19.91 5.4 vs 16.89 4.4 ) and final outcome ( 87.36 11.62 vs 81.55 11.32 ) .