Abstract: A self-tapping implant for use in a jawbone includes a body with plural thread spirals arranged thereon; a conically tapering portion arranged at a front end of the body and having one or more bone-chip recesses therein which accommodate bone material cut off during a tapping operation. The bone-chip recesses are formed by removal of material from the plural thread spirals and body. At least in the conically tapering portion, the plural thread spirals are materially reduced, and each of the materially reduced threads have a cutting edge which extends inward from an outer edge of a respective remaining thread part. Each cutting edge of a number of associated cutting edges of the materially reduced threads have a pointed shape which, in a cross section thereof, essentially follows a line which deviates from a first radius through a point of the pointed shape of the respective remaining thread part.

Abstract: A self-tapping implant for jawbone comprises a body (15) with threads arranged thereon, a conically tapering portion (12) arranged at its front end, and one or more spaces (4, 5, 6) which accommodate bone material cut off during tapping and which are formed by removal of material from the threads and body in question. Each materially reduced thread has a cutting edge (1a, 2a, 3a) which extends inwards from the outer edge of the respective remaining thread part and which can cooperate with the bone during tapping. Each cutting edge of a number of cutting edges has a pointed shape (1b, 2b, 3b) which, in the cross section of the thread in question, essentially follows a line which deviates from a radius (r) through the remaining thread part's front portion or the pointed shape's point (1b, 2b, 3b) in order in this way to form a cutting angle. Each cutting edge (1a, 2a, 3a) on a first remaining thread part (1, 2, 3) merges via a radius (r?) or curved part into a rear edge (e.g.

Abstract: An arrangement including a spacer element operative to support a superstructure and including a first passage and a second passage. The second passage is operative to permit mechanical anchoring of the holder. A first screw is operative to screw the spacer element into an implant. During an initial stage of insertion the first passage is operative to receive the first screw such that a center axis of the first screw is inclined in relation to a direction of screwing of the first screw. During a final stage of insertion the first passage permits the first screw to tilt such that the center axis of the first screw substantially coincides with the direction of screwing. A holder is operative to hold the spacer element. The holder substantially prevents the first screw from leaving the position it has assumed during the final stage of insertion. A second screw is operative to screw the superstructure onto the spacer element.

Abstract: In an arrangement for anchoring a threaded implant (1) in jawbone (2) by means of a screwing instrument (6), use is made of an implant which, at its upper part, is provided with an anchoring hole (1c) for a screw (5) intended to secure an element or fixture holder (4) that can be attached to the implant. The centre axis of the anchoring hole is inclined in relation to the longitudinal axis (1b) of the implant. The element is provided with means (4d) for cooperation with the instrument (6). The element and its means of cooperation permit application of the instrument in a way which ensures that the axis of rotation (6d) of the instrument essentially coincides with a continuation of the longitudinal axis (1b) of the implant.