Erratum to: Clin Orthop Relat Res DOI 10.1007/s11999-013-3120-6

In the Materials and Methods section of the published study by Bobyn and colleagues, the abbreviation for HA is incorrectly defined. The corrected version should read: All implants were plasma spray-coated with a thin (10–15 lm) layer of hydroxyapatite (HA; 98% purity, 99% density, 64% crystallinity, calcium: phosphate ratio of 1.67) such that only the outermost porous structure was HA-coated, leaving the innermost pores uncoated.

The editors apologize for the error.