10 Surgical, medical, dental and veterinary apparatus and instruments; electro medical instruments; medical apparatus for removing subgingival concrements; retractors [medical instruments]; surgical retractors; bone retractors; lip retractors; dental cheek retractors; apparatus and instruments for treating the oral cavity, including teeth and jaws, in particular with instruments oscillating at high frequency; medical apparatus and instruments for plaque removal using ultrasound; electro medical instruments, namely, powder jet devices; parts for the aforesaid goods