Oral implant

The invention discloses an oral implant for oral missing tooth restoration. The oral implant solves the problem that the existing oral implant has poor bone joint surface extruding effects in implant screwing plantation, has an unreasonable extruded bone tissue flow direction and cannot form an impeccable stress surface. A small end surface is a plane, an included angle (alpha) of an arc segment arc chord close to the small end surface and an implant axis is an acute angle less than 45 degrees, screw threads of the implant are T-type screw threads with unequal angles, an angle (beta) of a small end side is less than an angle (gamma) of a big end side, the width (1) of screw thread tooth root is greater than tooth cusp width (m), depth of screw threads (7, 8) are gradually reduced from the small end to the big end and the width (1) of the tooth root is gradually increased. The oral implant has reasonable bone joint surface extruding effects in implant screwing plantation, has good stability after plantation, h