The present invention discloses a bone-fusion dental implant, which comprises: an implant top having a cylindrical shape and including a circular smooth surface； and, an implanting portion which is connected with the implant top and includes a penetrative porous structure layer disposed under the circular smooth surface, wherein the penetrative porous structure layer has a predetermined thickness, and the predetermined thickness of the implant portion at its largest outer diameter is larger than 0.4 mm.一種骨融合人工牙根包括：一牙根頂部，具有圓柱外形，並包括一環形光滑表面；以及一牙根植入部，連接該牙根頂部，並包括：一穿透性多微孔結構層，設置於該環狀光滑表面下方，其中該穿透性多微孔結構層具有一預定厚度，當該牙根植入部在其最大外徑之位置時，該預定厚度大於0.4mm。
