A dental device comprises a distal part having a first lateral hole formed on a lateral side of the distal part a middle part connected to the distal part and a proximal part connected to the middle part, wherein the dental device has a central lumen penetrating the proximal part, the middle part, and the distal part and communicating to the first lateral hole and wherein the distal part has an exit of the central lumen at a distal end and the proximal part has an entrance of the central lumen at a proximal end.
