American citizen Nancy got double Oxinium knee replacements at the Madras Joint Replacement center, India by Dr.Venkatachalam. The Oxinium knee is a metal knee with a ceramic coating. This material is long lasting than traditional cobalt chrome alloys. It is particularly suited for middle aged baby boomers with knee arthritis as it can last their life time. Cost of this advanced Oxinium knee replacement is only one tenth the cost in the US as Nancy says.