Table 1.

Mean values and standard deviations of initial and reverse torque in indexed and nonindexed Morse Taper abutments and percentage loss from initial torque (N/cm)

Morse Taper abutment	Initial torque	Reverse torque	Percentage loss from initial torque (%)
Indexed (n=19)	20 (0)	10 (4)B	49
Nonindexed (n=18)	32 (0)	28 (3)A	14

SD in parentheses. Means followed by distinct letters indicate a significant difference in the reverse torque between indexed and nonindexed abutments (P<0.001). SD: Standard deviation