Table 3.

Percentages of the femora that have either over- or underhang, with the over- and underhang amounts, respectively

	Design family
	A	B	C	D	E	F
% Bones with component overhang	7.5	6.5	16.2	44.8	20.9	40.1
Overhang amount (mm) mean ± SD	1.2 + 0.7*	1.0 + 0.8a	1.9 + 1.3b	3.0 + 2.1c	1.9 + 1.4b	3.1 + 2.2c
% Bones with component underhang	92.5	93.5	83.8	45.2	79.1	59.9
Underhang amount (mm) mean ± SD	−3.2 ± 2.4a	−3.4 ± 2.5a	−4.7 ± 3.1b	−3.5 ± 2.7a	−4.8 ± 3.1b	−3.4 ± 2.8a
Pooled ML difference (mm) mean ± SD	−2.9 ± 2.5a	−3.0 ± 3.3a	−3.7 ± 3.8b	−0.6 ± 4.0C	−3.2 ± 4.5ab	−0.6 ± 4.6C

Pooled differences between component and bone ML dimensions are also indicated

Positive values indicate overhang; negative values indicate underhang

^abcIndicate statistical differences