A surgical implant having a datum surface for engaging tissue. Embodiments of the surgical implant include a recess in an original datum surface having a sharp undercut ovoid configuration and a multiplicity of recesses that are interconnected....http://www.google.co.uk/patents/US6599322?utm_source=gb-gplus-sharePatent US6599322 - Method for producing undercut micro recesses in a surface, a surgical implant made thereby, and method for fixing an implant to bone
