Abstract: Device for securing bits of bone together, particularly small-sized bats of bone, for example bits of metatarsal head, in the form of a spindle including an elongate shank (1) followed, after a breakable region (2), by a fixator element (3) extending frustoconically to reduce in diameter in the direction of the anterior end (4), with a screw thread the pitch of which decreases progressively from the anterior end and of which the crests of the thread lie inside a coaxial geometric cylinder (D), the anterior end forming a self-drilling end.

Abstract: A method of joining metal and ceramic parts, wherein an alumina forming metal part and a ceramic part are provided. A braze material in placed between the alumina forming metal part and the ceramic part, and the combination is then heated in an oxidizing atmosphere, preferably in air at a temperature of between 500° C. and 1300° C. The alumina forming metal parts are selected from the group consisting of high temperature stainless steels, such as Durafoil (alpha-4), Fecralloy, Alumina-coated 430 stainless steel and Crofer-22APU, and high temperature superalloys such as Haynes 214, Nicrofer 6025, and Ducraloy. The braze material is selected as a metal oxide-noble metal mixture, preferably Ag—CuO, Ag—V2O5, and Pt—Nb2O5, and more preferably between 30.65 to 100 mole % Ag in CuO.

Abstract: Device for securing bits of bone together, particularly small-sized bits of bone, for example bits of metatarsal head, in the form of a spindle comprising an elongate shank (1) followed, after a breakable region (2), by a fixator element (3) extending frustoconically to reduce in diameter in the direction of the anterior end (4), with a screw thread the pitch of which decreases progressively from the anterior end and of which the crests of the thread lie inside a coaxial geometric cylinder (D), the anterior end forming a self-drilling end.

Abstract: Self-tapping screw for small-bone surgery, comprising a threaded proximal head (2), a threaded distal shank with greater pitch and an internal cannula (4), characterized in that the distal shank (3) is threaded over its entire length in that the end of the shank has, apart from milled portions forming self-tapping faces on the first distal threads, at least two milled faces and which with the cannula, determine at least two notches (11) and at least two self-boring edges at the distal end of the screw, and in that the thread of the head has, aside from milled portions forming self-tapping faces on the first threads of the proximal screw thread, chamfered faces (16-19), determining boring edges (12b-15b) preceded by a short groove.