[ Dental implants; dental and orthodontic attachment devices, namely, ] closed coil springs, open coil springs, push coil springs, rod and piston appliances, * all used for attaching dental * orthodontic [ attachment ] devices [ for securing orthodontic appliances ]; [ orthodontic appliances, ] medical and surgical apparatus and instruments, namely, orthodontic fixation [ and/or attachment ] devices used in orthodontic appliance and implant surgery; and apparatus for physical training for den...