Typically, the band 14 is made from a biocompatible metal, e.g. titanium, stainless steel and cobalt-chromium alloys, and preferably from an alloy of Titanium-45 Niobium (i.e., 55% Ti and 45% Nb), having coefficient of linear thermal expansion on the order of between about 6???10???6/??? C. to 8???10???6/??? C. Note that both the Zirconium oxide and the Titanium-45 Niobium have similar coefficient