The Effect of Therapeutic Ultrasound on Metallic Implants: A Study in Rats

http://www.archives-pmr.org/article/S0003-9993(11)00365-0/abstract

this is very different then what i have learned earlier few years ago, does somebody know what could be the possible mechanism to dissipate the heat generated by the metal, the heated metal which was previously considered the contraindication for therapeutic US usage on it