Comparison of Elution Characteristics and Compressive Strength of Biantibiotic-Loaded PMMA Bone Cement for Spacers: Copal® Spacem with Gentamicin and Vancomycin versus Palacos® R+G with Vancomycin

Table 3

Comparison of compressive strengths before and after elution tests sorted by specimen group.

Specimen group	Compressive strength before elution  mean MPa (95% CI)	Comparison of groups		Compressive strength after elution mean MPa (95% CI)	before vs. after elution p
		before elution tests p	after elution tests p
Pal2	69.4 (66.8 – 72.0)	0.193	0.005	70.4 (67.3 – 73.2)	0.486
Cop2	66.9 (62.6 – 71.1)			63.9 (60.1 – 67.7)	0.173
Pal4	70.7 (65.5 – 76.0)	0.637	0.805	59.8 (57.5 – 62.1)	0.001
Cop4	69.5 (64.6 – 74.4)			60.1 (57.0 – 63.2)	0.002
Pal6	67.7 (58.2 – 77.1)	0.461	0.279	57.7 (53.8 – 61.6)	0.014
Cop6	65.1 (62.5 – 67.7)			55.5 (52.1 – 59.0)	< 0.000