In certain variations, systems andor methods for electromagnetic induction therapy are provided. Alternative embodiments feature devices for the same use and purpose which utilize the same operating principle enabling utilization of different materials and methods of construction. The processing unit calibrates the acoustic monitoring structure by calculating a distance between the acoustic source and a first sensor of the plural sensors. At least one pin 36 can be disposed through an attachment bore 22,24,26 in a leg 16A,16B and into or through the body of valve 12. The collar portion is located at a proximal end of the dental implant and forms an abutment mating surface which defines an outer edge that has a generally scalloped shape.