Table III.

Results of ultimate compressive strength testing

	Mean ultimate compressive strength (MPa) (range)
	Pre-elution	p-value vs control		Post-elution	p-value vs control
Control	86 (85 to 87)	-		84 (81 to 86)	-
Vancomycin	79 (73 to 88)	0.692		75 (72 to 77)	0.707
Teicoplanin	85 (82 to 87)	1.000		74 (73 to 74)	0.530
Ceftazidime	85 (87 to 81)	1.000		85 (77 to 88)	1.000
Imipenem	67 (65 to 68)	0.004		55 (53 to 58)	< 0.001
Piperacillin	87 (82 to 91)	1.000		80 (71 to 85)	0.994
Gentamicin	86 (84 to 88)	1.000		75 (70 to 82)	0.723
Tobramycin	82 (79 to 83)	0.958		79 (79 to 80)	0.989