Abstract: Drills for dentistry, which, in a dental implant treatment, enables two or more holes to be bored at a predetermined angle and interval in a minute space in which a single tooth grows and enables treatment to be performed precisely and rapidly regardless of a skill level of a dentist, wherein an arrangement is provided where a first member provided with a drill body and a second member provided with a fixing needle intersect slid-ably at a predetermined angle, the drill body is installed in a direction perpendicular to an axial direction of the first member with its tip facing a direction in which the fixing needle is provided, the fixing needle is installed in a direction perpendicular to an axial direction of the second member with its tip facing a direction in which the drill body is provided, the drill body bores a first hole, bored obliquely with respect to a natural tooth growing direction, and a second hole facing the first hole mutually at a predetermined angle, and the second hole is bored by the dri

Abstract: The present invention is to provide implants for an artificial tooth that does not require a period, for integration of implant bodies and a jawbone as in the background art, enables treatment even of a patient whose jawbone is small in bone amount or thickness, can reduce the treatment period and the number of times of treatment for many patients, and can lighten the mental and physical burden of a patient by minimizing the impact to the jawbone, and this invention is characterized by the following means, an artificial tooth, implant device with an arrangement where at least two implant bodies, each having a shaft portion, form a pair, a hook portion, hooked in a hook hole bored in a jawbone, is provided on the shaft portion of each implant body, the hook, portion is bent with respect to the shaft portion, and when the respective implant bodies are hooked onto the jawbone, tip portions of the hook portions are positioned so as to face each other inwardly, the arrangement being provided with a fixing means fo