A contra-angle dental handpiece attachment for a device for driving an endodontic file and for operating a remote pump , the contra-angle dental handpiece attachment comprising an elongated housing made of radiolucent plastics, the elongated housing comprises a generally hollow handle portion , a shank portion being connected to the handle portion , and a head portion being connected to the shank portion wherein the handle portion is designed to enclose at least partially the device and configured to form a detachable form-fit connection with the device ; wherein the handle portion is made of radiolucent plastics in order to not interfere with electromagnetic components of the device , including a transmitter and/or an antenna and/or an rotatable magnetic holding means of the device ; wherein a drive arrangement made of plastics is mounted in the shank portion , the drive arrangement comprising a file shaft for driving the endodontic file , an eccentric shaft being coupled to the file shaft and a crown gear shaft being coupled to the eccentric shaft , wherein a crown gear of the crown gear shaft protrudes in the handle portion and is positioned to rotatably couple to a gear for driving the endodontic file of the device ; wherein the head portion comprises a chuck for receiving an endodontic file ; wherein the elongated housing further comprises a through-conduit for delivering an irrigation solution to a tooth root canal , the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a reservoir and a distal end at the head portion where the endodontic file is placed; wherein the elongated housing further comprises a through-conduit for sucking an irrigation solution from a tooth root canal , the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a remote pump remotely operated by the device and a distal end at the head portion configured for establishing a fluid communication with an area of the tooth root canal from which the irrigation solution may be removed. wherein the handle portion is designed to enclose at least partially the device and configured to form a detachable form-fit connection with the device ; wherein the handle portion is made of radiolucent plastics in order to not interfere with electromagnetic components of the device , including a transmitter and/or an antenna and/or an rotatable magnetic holding means of the device ; wherein a drive arrangement made of plastics is mounted in the shank portion , the drive arrangement comprising a file shaft for driving the endodontic file , an eccentric shaft being coupled to the file shaft and a crown gear shaft being coupled to the eccentric shaft , wherein a crown gear of the crown gear shaft protrudes in the handle portion and is positioned to rotatably couple to a gear for driving the endodontic file of the device ; wherein the head portion comprises a chuck for receiving an endodontic file ; wherein the elongated housing further comprises a through-conduit for delivering an irrigation solution to a tooth root canal , the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a reservoir and a distal end at the head portion where the endodontic file is placed; wherein the elongated housing further comprises a through-conduit for sucking an irrigation solution from a tooth root canal , the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a remote pump remotely operated by the device and a distal end at the head portion configured for establishing a fluid communication with an area of the tooth root canal from which the irrigation solution may be removed. <EOS>