This invention provides a replacement of dental wax pen-shaped knife device. It comprises a shaft, a gripper, a buffer, a casing, and a pointed set. The shaft with the thread has two terminals in the opposite. The gripper with a gripper part is connect the one terminal of the shaft to ground separablly. The buffer set onto the shaft and has a elastic resilience by the external force. The casing is set by the shaft and has a round wall, a round space by the round wall define, a ring step, and a central hole. The pointed set with a hollow wall is connect the one terminal of the casing to ground separablly. After The gripper and shaft are combined, they are inserted in the hollow wall of the pointed set.一種更換式筆形齒科蠟刀裝置,包含一軸桿、一夾爪件、一緩衝件、一套管件,及一尖套件。軸桿具有相反的兩端並設置有螺紋,夾爪件是可分離地與軸桿之一端相互螺合連接在一起,並具有一夾爪部,緩衝件套置於該軸桿上,並可受外力型變而產生彈性回復力,套管件供該軸桿套置,並具有圍繞壁、由該圍繞壁所界定出之圍繞空間、設置於該圍繞空間中並與該圍繞壁連接之環階,及一形成於該環階上並可供該軸桿穿過之中心孔,尖套件概呈截頭圓錐狀並具有一中空管壁,並可分離地與該套管件連接在一起,夾爪件與軸桿螺合後是伸置於該尖套件之中空管壁中。4...套管件5...尖套件6...按壓件7...頂部旋蓋8...工作刀頭
