Method of Maintaining Fatigue Performance in a Bone-Engaging Implant

Author:  Hai H. Trieu, Frank Bono
Source:  US Patent 2008/0221688A1
Doc ID:  2008134
Year of Publication:  2008
Abstract:  
ABSTRACT This disclosure is directed to a method capable ofmaintaining the fatigue performance of a bone-engaging implant after surface texturing through the imparting of a residual compressive stress. A residual compressive stress is imparted via peening or another process. The peened surface is then roughened to improve mechanical adhesion for bone fixation via grit blasting or another process. The depth of penetration of the roughened texture is less than the depth of the residual compressive stress.