A cultured pluripotent animal cell that is CD13+, CD90+, and CD117\u2212. A second clamping member is mounted with respect to the first clamping member wherein the second clamping member comprises a second clamping surface for engaging a second surgical rod. A conductive bump connects the at least one metal pillar of the first semiconductor die to the at least one metal pillar of the second semiconductor die. The cleaning brush has a shape that is symmetric about its vertical axis, and has an upper bevel cleaning surface, an end surface cleaning surface, and a lower bevel cleaning surface.