Abstract: The invention relates to a method for the removal of caries (4) in a cavity (7), in which a flowable medium (11), which contains a caries (4)-dissolving substance and/or solid particles (13), is introduced into the cavity (7) and for improving the effectiveness the medium is acted upon with oscillations by means of an oscillation part (14) which is applied in the medium (11) located in the cavity (7).

Abstract: The invention relates to a medical or dental-medical instrument (1) for the material-removing working of body tissue or a substitute material, having an elongate handpiece (2), a holding device (4) arranged in the forward end region of the handpiece (2), and a tool (5) having a tool shaft (5a) and a tool body (5b) connected therewith, which is releasably connected with the handpiece (2) by means of the holding device (4), there being arranged in the handpiece (2) a vibration drive (6) for the tool (5), which transfers to the tool (5) high frequency oscillating movements, back and forth in at least one plane or orbital or three-dimensional, the tool body (5b) having an abrasive working surface (5c), the tool body (5b) being formed by means of a lamina (B), and the working surface (5c) being arranged at a narrow edge (21) of the lamina (B).

Abstract: System for the removal of a defect in a tooth (71), consisting of an oscillatingly movable tool (3) having working surfaces (56) for an abrasive making of a cavity (K) in the tooth, a filling material for filing the cavity (K), an insert (91, 91A) which can be placed into the cavity (K), which with regard to its surface region surrounded by the cross-sectional walls (KW) of the cavity (K) is pre-fabricated adapted to the dimension and shape, and a binding material (92), which hardens or cures, for bonding the insert (91, 91A) with the walls (KW) of the cavity (K).

Abstract: The device for the retention and the adaptation of a matrix to the treated portion of a tooth includes a tightener clamp whose ends are each provided with an adaptation cushion having anchoring elements and adaptation elements, the cushion being destined to adapt to the contour of the border area of the cavity of the treated tooth portion in a formfitting manner. Such a device effectively prevents the formation of proximal excesses in composite fillings.

Abstract: A dental tool having a processing section at one end which includes a longitudinally extending lateral face and a transversely extending front face having an abrasive working face located at a distance from the lateral face so as to permit forming a precise marginal edge around a tooth to permit precise positioning of a crown while avoiding deleterious working of the tooth region nearest the stump on which the crown is to be mounted.

Abstract: In the case of a medical or dental handpiece with a tool for the processing of body tissue or of a substitute material by machining, wherein the tool comprises an, in particular, elongated processing section extending from a base part connected to the handpiece by a detachable connecting device, the processing section having at least one abrasive working face extending in its longitudinal direction and/or transverse thereto, the handpiece has an oscillating drive for the tool, in particular for a frequency in the ultrasonic range, an articulation is assigned to the connecting device, and the axis of the articulation extends approximately in the longitudinal direction of the longitudinal axis of the processing section, approximately at a right angle thereto or in an angular range lying in between.

Abstract: System for the removal of a defect in a tooth (71), consisting of an oscillatingly movable tool (3) having working surfaces (56) for an abrasive making of a cavity (K) in the tooth, a filling material for filing the cavity (K), an insert (91, 91A) which can be placed into the cavity (K), which with regard to its surface region surrounded by the cross-sectional walls (KW) of the cavity (K) is pre-fabricated adapted to the dimension and shape, and a binding material (92), which hardens or cures, for bonding the insert (91, 91A) with the walls (KW) of the cavity (K).

Abstract: In a tool (1) for the preparation, with the removal of material, of a lateral cavity (K) in a tooth (Z), which tool has a tool shaft (2) of which one end is connected or can be connected with a dental handpiece (4) and of which the other end is connected or can be connected with a working body (14), the longitudinal middle axis (11b) of which working body extends approximately co-axially or axis parallel to the longitudinal middle axis (11a) of the tool shaft (2), and which working body has to both sides of a longitudinal middle plane (7) extending into its longitudinal middle axis (11b), lateral working surfaces (6) which each include an acute angle with the longitudinal middle plane (7), whereby the working surfaces (6) diverge in the direction towards the tool shaft (2), the working surfaces (6) have, at least in their longitudinal region (L3) towards the tool shaft (2), or over their entire length (L), a progressive divergence (18) relative to the middle axis (11b) of the working body (14).