A plant dental drill needle bores deep positioning backstop external member and is made of plant dental drill head and positioning set,Wherein planting tooth chisel edge is a blade part,A concave part is opened up above blade part,The concave part is arranged for o type ring,A stop section is set above concave part,It is then shank section above stop section； Positioning set center is in a hollow form,The diameter of hollow form needs big what to plant dental drill head,The internal ring wall upper limb of positioning set opens up a concave part,The concave part accommodates for planting o type ring on dental drill head,Position what positioning set lower edge then opens up a cooling bath for running through internal ring wall.一種植牙鑽針鑽深定位止擋套件係由植牙鑽頭及定位套件所組成，其中植牙鑽頭前端為一刀刃部，刀刃部上方開設一凹槽部，該凹槽部可供o型環套設，凹槽部上方設一擋止部，擋止部上方則為刀柄部；定位套件中央呈一中空狀，中空狀之直徑需大於植牙鑽頭，定位套件之內環壁上緣開設一凹槽部，該凹槽部可供植牙鑽頭上o型環容置，位於定位套件下緣則開設一貫穿內環壁之冷卻槽。
