Abstract: The present invention relates to a toothbrush for preventing the formation of dental plaque and tartar. The toothbrush comprises a supporting area for bristles connected to a handle which extends along a longitudinal axis. Such a handle comprises a first side and a second side, which are opposite to each other. The first side defines a first recessed portion which extends from the supporting area. The second side defines a further recessed portion which is at least partially longitudinally staggered with respect to the first recessed portion of the first side of the handle.

Abstract: The invention refers to a toothbrush having anti-dental plaque and anti-tartar activity, characterised in that its bristle-carrier zone (4) is misaligned to the handle (1), a first side of said handle is aligned to the relevant side of said bristle-carrier zone and the second side of said handle has an undercut (3) bounding a recessing portion (2), said recessing portion being 2 or 3 cm. long.

Abstract: Intrauterine device having a spiral (1,2) wound on a plastic material support (3). The spiral comprises a pair of different metals welded together or being in close reciprocal contact. The spiral is in contact with the uterine environment.

Abstract: A metal clip for the simultaneous suture of the cutaneous tissue and subcutaneous tissue, consisting of two arch-shaped arms of larger radius with two points at their ends, and two arch-shaped arms of smaller radius with two points at their ends. The arms are joined together by a common segment to form a rigid system.

Abstract: Trocar needle for laparoscopy with a truncated cone bit (1) having at its truncated cone end a cutting blade (2) with a rounded edge arranged obliquely to the axis of the needle and to the plane perpendicular to the axis of the needle which continues with a cutting thread (3) developing in a single turn around the truncated cone tip.