The load to 2 mm of displacement and the load to failure averaged , respectively , 324.4 N ( standard error of the mean [ SEM ] = 73.5 N ) and 386.4 N ( SEM = 65.6 N ) for the transtrapezial approach group compared with 125.7 N ( SEM = 22.6 N ) ( p = 0.002 ) and 191.4 N ( SEM = 36.30 N ) ( p = 0.005 ) for the standard volar approach group .