Table I.

Comparison of interfacial shear strengths

Strength	Groups		Difference	95% CI	p-value*
	Control (n = 40)	Burr (n = 35)
Shear strength, MPa (sd)	46.3 (2.9)	45.8 (3.8)	-0.5	-2.0 to 1.1	0.57
	Control (n = 40)	OSCAR (n = 30)
Shear strength, MPa (sd)	46.3 (2.9)	33.6 (7.9)	-12.7	-10.0 to 15.4	< 0.001
	Burr (n = 35)	OSCAR (n = 30)
Shear strength, MPa (sd)	45.8 (3.8)	33.6 (7.9)	-12.3	-15.3 to -9.3	< 0.001

^*One-way analysis of variance (ANOVA) adjusted for multiple testing

CI, confidence interval; OSCAR, Orthosonics System for Cemented Arthroplasty Revision