The invention relates to a dental implant. The dental implant has a body portion, a first screw portion, a head portion, a plurality of second screw portion and a plurality of trenches. The head portion and the first screw portion are respectively disposed at distinct ends of the body portion. The second screw portions, with greater pitch than the first screw portion, are disposed at radial side of the body portion, and each of the second screw portion has a cutting surface and a cumulating surface. The trench is disposed at side of the head portion and the body portion, with passing through the cutting surfaces and cumulating surfaces to approach the first screw portion.本發明為一種植牙體結構,其包括有一本體部、一第一螺紋部、一頭部、多個第二螺紋部及多條側切槽。其中,該本體部於縱向上定義有一鑽入軸向,該第一螺紋部位於該本體部沿該鑽入軸向的其中一端部上,該頭部位於該本體部沿該鑽入軸向的另一端部;該第二螺紋部具有大於該第一螺紋部的螺距,且橫向設置於該本體部的徑向側邊,多個第二螺紋部沿該鑽入軸向設置於不同位置,每一第二螺紋部在該植牙體結構之旋轉方向P的相異兩端部上設置有一切削面及一骨屑堆積面;該側切槽設置於該頭部及該本體部的徑向側邊,並自該頭部穿越經過多個切削面及多個骨屑堆積面而接抵該第一螺紋部。1‧‧‧植牙體結構11‧‧‧第一螺紋部12‧‧‧第二螺紋部123‧‧‧切削面124‧‧‧骨屑堆積面14‧‧‧側切槽15‧‧‧頭部17‧‧‧牙科連接件18‧‧‧本體部J‧‧‧切線P‧‧‧旋轉方向Z‧‧‧鑽入軸向Φ、λ‧‧‧角度
