Abstract: The present invention relates to a rotary cutting instrument, in particular of the bur type, intended for chirurgical or dental use and comprising an active cutting part and a handle. Said active part is made of a metal carbide and the handle is made of a nickel-titanium alloy. The instrument further comprises an intermediate part made of stainless steel placed between the active part and the handle and metallurgically connected to said active part and to said handle.

Abstract: The present invention relates to a rotary cutting instrument, in particular of the bur type, intended for chirurgical or dental use and comprising an active cutting part and a handle. Said active part is made of a metal carbide and the handle is made of a nickel-titanium alloy. The instrument further comprises an intermediate part made of stainless steel placed between the active part and the handle and metallurgically connected to said active part and to said handle.

Abstract: The invention relates to a tool holder (1) which is intended to receive a flexibly-deformable tool (12), such as an injection needle or a cutting tool. The operating direction (15) of the tool is not parallel to the axis (14) of the tool holder (1) . The inventive tool holder (1) is characterised in that it ends in a part (4) of a channel that opens out onto the outside of the body (2) of the tool holder, comprising a surface having generatrices that are essentially parallel to the axis of the body and enabling the tool (12) to be introduced by moving same in relation to the axis (14) of the body of the tool holder. Said tool holder (1) comprises forms that enable the safe introduction of the needle, simple cleaning, inexpensive manufacture and a quality connection between the needle and the body.

Abstract: The invention relates to a tool holder (1) which is intended to receive a flexibly-deformable tool (12), such as an injection needle or a cutting tool. The operating direction (15) of the tool is not parallel to the axis (14) of the tool holder (1). The inventive tool holder (1) is characterised in that it ends in a part (4) of a channel that opens out onto the outside of the body (2) of the tool holder, comprising a surface having generatrices that are essentially parallel to the axis of the body and enabling the tool (12) to be introduced by moving same in relation to the axis (14) of the body of the tool holder. Said tool holder (1) comprises forms that enable the safe introduction of the needle, simple cleaning, inexpensive manufacture and a quality connection between the needle and the body.