title: Dense alumina aged in vivo.
abstract: Auger electron spectroscopy was used to investigate the relative concentration of the calcium impurity at the external and fracture surfaces of a dense alumina after in vivo exposure for 6, 12, and 23 weeks. The Ca concentration at the external surface initially decreased, reached a minimum at 12 weeks, and increased thereafter. These results, were compared with the flexural strength, which decreased nearly linearly from 6 to 23 weeks.
mesh_terms: D000535:Aluminum / Q000032:analysis*; D000537:Aluminum Oxide / Q000032:analysis*; D000818:Animals; D001672:Biocompatible Materials / Q000032:analysis*; D002118:Calcium / Q000032:analysis; D002516:Ceramics / Q000032:analysis*; D005260:Female; D006358:Hot Temperature; D019736:Prostheses and Implants; D051381:Rats; D013997:Time Factors
chemical_list: D001672:Biocompatible Materials; D000535:Aluminum; D000537:Aluminum Oxide; D002118:Calcium