There is provided a needle tip for extracting separated endodontic instruments from the root canal of a tooth. The needle tip is fabricated with a thermomechanically treated alloy exhibiting both shape memory and super-elasticity. There is also provided for a needle that includes a handle and a terminal tip, which is fabricated with a thermomechanically treated alloy. The alloy is thermomechanically treated nickel- titanium alloy. The needle is straight at room temperature and takes on a specific shape when inserted in the canal of the tooth from which the endodontic separated instrument is to be extracted. Also provided herein is a method for removal of endodontic separated instruments from the canal of a tooth.

There is provided a needle tip for extracting separated endodontic instruments from the root canal of a tooth. The needle tip is fabricated with a thermomechanically treated alloy exhibiting both shape memory and super-elasticity. There is also provided for a needle that includes a handle and a terminal tip, which is fabricated with a thermomechanically treated alloy. The alloy is thermomechanically treated nickel- titanium alloy. The needle is straight at room temperature and takes on a specific shape when inserted in the canal of the tooth from which the endodontic separated instrument is to be extracted. Also provided herein is a method for removal of endodontic separated instruments from the canal of a tooth.

An instrument for removing fractured root canal instruments, comprising an instrument housing formed hollow at least at its front end portion, a slide which is non-rotatably held on the instrument housing but guided for translational movement in an axial direction, a threaded rod which is fixed to the slide and is engaged with a counter thread of the instrument housing or a counter member held on the instrument housing, so that a relative rotational movement between the threaded rod on the one hand and the instrument housing and/or the counter member on the other hand results in an axial displacement of the slide, and fastening means for fastening a wire to the slide, wherein the hollow instrument housing is open towards its front side, so that a wire can be guided through the open front side into the instrument housing and therein to the fastening means.

An instrument for removing fractured root canal instruments, comprising an instrument housing formed hollow at least at its front end portion, a slide which is non-rotatably held on the instrument housing but guided for translational movement in an axial direction, a threaded rod which is fixed to the slide and is engaged with a counter thread of the instrument housing or a counter member held on the instrument housing, so that a relative rotational movement between the threaded rod on the one hand and the instrument housing and/or the counter member on the other hand results in an axial displacement of the slide, and fastening means for fastening a wire to the slide, wherein the hollow instrument housing is open towards its front side, so that a wire can be guided through the open front side into the instrument housing and therein to the fastening means.

An endodontic instrument extraction tool is provided. The device includes a housing having a first end opposite a second end and a sidewall extending therebetween, defining an interior volume. A grasping mechanism is disposed within the interior volume, wherein the grasping mechanism includes a plurality of arms selectively movable between an open position and a closed position. A distance between each of the plurality of arms is minimized when the plurality of arms is in the closed position. A rotatable member is disposed within the first end of the housing and is operably connected to the grasping mechanism, such that the plurality of arms move towards the closed position when the rotatable member is rotated in a first direction and move towards the open position when the rotatable member is rotated in a second direction.

An endodontic instrument extraction tool is provided. The device includes a housing having a first end opposite a second end and a sidewall extending therebetween, defining an interior volume. A grasping mechanism is disposed within the interior volume, wherein the grasping mechanism includes a plurality of arms selectively movable between an open position and a closed position. A distance between each of the plurality of arms is minimized when the plurality of arms is in the closed position. A rotatable member is disposed within the first end of the housing and is operably connected to the grasping mechanism, such that the plurality of arms move towards the closed position when the rotatable member is rotated in a first direction and move towards the open position when the rotatable member is rotated in a second direction.

A medical tool and a method for using the medical tool removes tooth fragments, in particular tooth roots and/or remainders of tooth roots, from a tooth socket or an alveole in the region of the jaw. The medical tool includes a base and a needle disposed on the base. The needle has a retentive section and a drilling section.

A medical tool and a method for using the medical tool removes tooth fragments, in particular tooth roots and/or remainders of tooth roots, from a tooth socket or an alveole in the region of the jaw. The medical tool includes a base and a needle disposed on the base. The needle has a retentive section and a drilling section.

A device for removing a file fragment lodged within a root canal of a tooth may include: a flexible shaft configured for insertion into the root canal; a plurality of prongs extending from the distal end of the flexible shaft; a concentric shaft slidable upon the flexible shaft and configured to contact and move the prongs into contact with the file fragment; and a device to create and deliver vibrations at an intensity configured to cause local melting of the plurality of prongs in contact with the fragment, for welding of each of the prongs to the fragment. Counter-rotation of the shaft and fragment may cause it to be dislodged from the canal. Prior to using the device, the root canal may generally be enlarged using a drill, and an umbrella drill is used to form an opening around the coronal end of the fragment to expose a portion thereof.

A device for removing a file fragment lodged within a root canal of a tooth may include: a flexible shaft configured for insertion into the root canal; a plurality of prongs extending from the distal end of the flexible shaft; a concentric shaft slidable upon the flexible shaft and configured to contact and move the prongs into contact with the file fragment; and a device to create and deliver vibrations at an intensity configured to cause local melting of the plurality of prongs in contact with the fragment, for welding of each of the prongs to the fragment. Counter-rotation of the shaft and fragment may cause it to be dislodged from the canal. Prior to using the device, the root canal may generally be enlarged using a drill, and an umbrella drill is used to form an opening around the coronal end of the fragment to expose a portion thereof.