Abstract: A method for warning of an instrument break risk during an endodontic treatment. The method includes the following steps: acquiring the shape of a root canal to be treated; identifying a risk zone, on the basis of complexities in the shape of the canal, such as bends or bifurcations in the canal; in real-time, acquiring a working depth of the instrument; determining the position of the instrument within the canal, and issuing a warning when the instrument reaches the risk zone.

Abstract: A method for collecting usage data of an endodontic instrument. The method includes the following steps: acquiring data relating to the shape of a root canal to be treated; at regular intervals, acquiring data relating to the working depth of the instrument in the root canal; at regular intervals, acquiring data relating to the stress undergone by the instrument during work; and producing a database linking each data item acquired.

Abstract: A handpiece for endodontic practice, which is devised to drive a root canal instrument and includes: a control unit which runs a computer program, and a measuring element for measuring mechanical stresses experienced by the instrument, the measuring element is connected to the control unit. The computer program being configured to compare the mechanical stresses experienced by the instrument with respect to a predefined threshold, the predefined threshold preferably being a threshold permissible by the instrument. The mechanical stresses are at least axial stresses, and depending on the comparison between the axial stresses experienced by the instrument and the threshold: the computer program is programmed to adapt the driving of the instrument, and/or the handpiece including a warning element, and the computer program is programmed to activate the warning element.

Abstract: A method for monitoring a failure of an endodontic instrument used during an endodontic treatment during which the instrument is driven by a handpiece and generates a set of acoustic emission signals, remarkable in that the method includes the steps of: sensing and analysing all of the acoustic emission signals generated by use of the instrument; and when a failure of the instrument occurs, thus generating a failure acoustic emission signal, detecting the failure acoustic emission signal amongst the set of acoustic emission signals in order to detect the occurrence of the failure.

Abstract: A system for managing data of an environment of an endodontic instrument, which includes: an endodontic instrument, intended to experience several stages of the life cycle such as logistics, use during endodontic treatment, end of life, the instrument being equipped with a unique identifier, and presenting recommended use parameters; an element for obtaining at least one real usage parameter experienced by the instrument during a life cycle stage; an element for reading the unique identifier during at least one stage of the life cycle of the instrument; computer equipment intended to be connected to the reading element and the obtaining element, including a database, and executing a computer program. The computer program is configured to record in the database, during at least one life cycle step, the unique identifier of the instrument read, the actual usage parameter obtained, a timestamp, and this recording is authenticated.

Abstract: The invention relates to a root canal instrument (10) having a blade comprising a plurality of helical cutting edges (20), the blade being conical in shape and extending from a tip (11) towards a mandrel (12) of the instrument, the helical edges (20) having a pitch increasing along a longitudinal axis of the instrument from the tip (11) towards the mandrel (12). According to the invention, it comprises a ratio between the pitch at the mandrel (12) and the pitch of the end of the tip (11), of between 2 and 4.

Abstract: The angle piece head drives an instrument for operating on dental roots and includes a body having a generally cylindrical cavity and an instrument-holding core in the cavity. The core is shaped to receive and hold the instrument and moves axially and pivotally. The instrument-holding core includes a groove having an offset engaging therewith. The offset engages with one or the other of the two edges of the groove such that the rotation thereof transmits an alternating axial movement to the instrument while enabling same to rotate about the axis of the instrument. The groove includes two portions that extend on either side of a median area. For each portion, the height, namely the distance that separates the two edges, increases from the median area to each end of the groove.

Abstract: A dental reamer root canal instrument has a working area that is substantially cylindrical or conical along a longitudinal axis, the instrument including X helical flutes forming X lips of helical cuts, a cut lip being formed by the intersection of two consecutive flutes, wherein X is equal to or greater than three. Over a cross-section of the instrument, the angles (?I, ?I, ?I) between two consecutive cut lips, measured relative to the longitudinal axis of the instrument, are all different. A method for producing the root canal instrument in a cylindrical or conical rod is also disclosed. The rod is made of a metal or metal alloy material selected for the mechanical bending strength and shape memory properties thereof. The method includes steps for using a grinding wheel to machine a flute to a predefined depth and steps for rotating the rod in front of the machining wheel.

Abstract: A novel apparatus is provided for moving tools used in surgery, in particular in dental surgery. The apparatus includes a head into which a tool is attached and a shaft onto which the head is attached, characterized in that said apparatus also includes a means for transmitting the movement of a motor to the tool, the transmission means including a first transmission axis, for transmitting a first movement at a first frequency, and a second transmission axis, for transmitting a second movement at a second frequency, the first frequency being different from the second frequency.

Abstract: A rotary rammer is provided which is suitable for the cold filling of a root canal. The rotary rammer includes an active zone having a shoulder and a point. The active zone has a generally conical form, an outer surface of which is smooth, a diameter of a section of the active zone in the vicinity of the point being less than a diameter of a section of the active zone in the vicinity of the shoulder. An end section is provided adjacent to the shoulder of the active zone. The end section has a means for connecting to a mandrel of a mechanical rotational driving device. The rotary rammer is applicable to the dental field.

Abstract: A handpiece includes a head for receiving a tool, a rear sleeve for coupling the handpiece to a motor, and a body connecting the head to the rear sleeve. The body includes a hollow sleeve in which mechanical members are mounted in order to transmit a rotating movement to the tool. The body also includes an over-molded casing made from a composite material, in which the hollow sleeve is encased. The handpiece is suitable for use in the dental and medical fields.

Abstract: A new reamer has a cut blade including a plurality of helical cutting lips, wherein a number of helical cutting lips varies along a longitudinal axis of the cut blade.

Abstract: A dental handpiece (1) includes mechanical components, in particular, a tool-holder assembly for the attachment and for the rotational driving of a dental instrument about a drive axis (6) and an assembly for the transmission of such movement. The mechanical components are mounted in the interior of a body (2) having a head (4) and a handle (3). The mechanical components of the handle and the head of the handpiece are electrically connected by an elastic and electrically conducting connecting device.

Abstract: A head assembly for attaching to a dental instrument has a body, a rotary shaft with a pinion thereon, at least one retractable catch latching lever and a retractable catch. The rotary shaft has a central bore suitable for receiving a shank of the dental instrument therein. The latching lever has a peg engageable with an annular latching groove of the shank of the dental instrument. The catch has a positioning plane coinciding with the drive flat of the instrument. The body has a circular opening closed off by a push button cooperative with the rotary shaft so as to release the shank of the dental instrument.

Abstract: The invention relates to a device for axial retention of a dental instrument shank and for transmitting the rotational driving of the instrument. The device is arranged in a head of a contra-angle or handpiece. The shank has an annular groove in which at least one stud is able to engage radially, and a flat permitting rotational driving of the shank. The rotational movement is communicated by an output pinion of a mechanical transmission assembly coupled to a drive motor and arranged in a sleeve joined to the head of the contra-angle. The device is formed by a shaft traversed axially by the instrument shank, at least one elastic lever, and at least one pin. There is cooperation of the pin or pins with the flat provided on the instrument shank.

Abstract: The invention relates to a protective device for dental equipment of the type including a straight handpiece or a contra-angle. The dental equipment is formed by a body enclosing a motor unit and/or members for transmitting movement and a tool-holder head bearing a tool. The protective device is a sleeve that has the general form of a glove finger, with an opening at one end and a closed base at the other end. The invention also relates to a sealed packaging for an insert formed by a tool-holder head bearing the tool and equipped with the protective device.

Abstract: A blank for use in producing an endodontic instrument using a grinding technique includes a cylindrical portion, and a generally conical portion which is to be machined by the grinding technique to form the active part of the endodontic instrument. The generally conical portion of the blank approximates, and is slightly larger than the envelope of the final shape given to the active part of the endodontic instrument after machining. A method is also provided for producing an endodontic instrument having at least one helical cutting edge using the blank.

Abstract: A dental power instrument, in particular, an endodontic instrument, has an operative part (2) at one end and a handle (3) at the opposite end. The handle (3) of the dental instrument is provided with a rotary drive (4) which, when mounted in the head (5) of a handpiece, can directly engage with a rotary drive (4?) upstream of the head. The rotary drive (4) can be inserted and withdrawn independently of the rotary drive (4?) associated with the head of the handpiece, and rotates in the same direction as the rotary drive (4?) associated with the handpiece. Also provided is a handpiece head (5) and a dispenser (30) for such dental power instruments.

Abstract: A sequence of canal instruments for performing an endodontic operating protocol uses a sequence of several instruments, for example, three such instruments with three cutting blades. The instruments have a progressive conicity, for example, 6%, 4% and 2%, and each instrument has an identical progressive pitch. The pitch further increases progressively from instrument to instrument as a function of the conicity of each instrument.

Abstract: The invention relates to a method for designing and producing a package intended for the protection and/or transportation of a product. All of the digital design steps for the package are integrated in the method for digitizing the product, which includes a step of laminating a virtual key form of the product used to define geometrical data of each layer of the package to be cut. Then, the cutting is carried out followed by the stacking of the layers of the package defined by the design steps for said package to form a real package. The invention also relates to the package obtained by the method.