Abstract: The invention relates to an instrument for periodontal treatment, consisting of a connection piece (4) and of a blade (1), wherein said blade (1) has an abrasive part exhibiting two sectors (10, 11) distributed along the blade, and each situated on opposite sides of a plane passing through the axis of the blade, these two sectors (10, 11) exhibiting different levels of abrasiveness such that when the instrument is introduced into the periodontal pocket during treatment, the more abrasive sector comes into contact with the root surface of the tooth, and the other, less abrasive, sector comes into contact with the mucosa, said instrument being adapted to be held by way of its connection piece (4) on a handpiece which confers a vibratory movement on it, allowing the two sectors (10, 11) to effect the detachment of the undesirable tartar.

Abstract: The invention relates to an endodontic instrument which can be fitted on a vibratory handpiece (1) for the treatment of a tooth canal or the retreatment thereof, wherein it is made up of a rigid proximal portion constituting the sleeve which allows it to be fixed to the vibratory handpiece (1), of a median portion (4) which is also rigid and whose axis forms an angle (x) with the proximal portion, and of a distal portion (5) whose axis at the end forms an angle (y) with the median portion in the direction opposite that of the proximal portion, said distal portion being of a general conical line and of a dimension at the tip permitting its penetration into the canal.

Abstract: A head for a dental contra-angle having an operating shaft is coupled to the operating shaft in the vicinity of the bend of the contra-angle. The head is produced principally from a synthetic material and comprises an element for fastening the head onto the contra-angle, a pinion engaging a drive shaft associated with the head, and a support for receiving a tool and for locking the tool in the head. These various elements are designed so that the head can be sterilized or disposed of after use.

Abstract: Dental instrument for the treatment of caries and for oral surgery, of the type comprising a laser beam emission source, the said laser radiation being conveyed by optical fibre through the dental instrument (12) up to the zone to be treated, characterised in that it comprises control means enabling the user to vary at will during an operation at least one of the emission parameters of the laser beam chosen from the group comprising: the firing of the laser shot or shots, the energy of the laser beam, the frequency of the shots.

Abstract: Atomizing process and device for dentistry handpieces or angle pieces, characterized in that it involves generating, in the region of the receptacle of the tool in the handpiece or angle piece, a suction effect putting the vicinity of the cutter receptacle under a slight vacuum under the effect of an air cone of which the apex is situated at the point where the tool is working, the other function of this air cone being to direct the cooling fluid by means of an effect of the COANDA type, thereby reducing the consequences of turbulences attributable to the rotation of the tool or instrument.

Abstract: An apparatus for measuring fluid pressure has an electrical circuit for measuring fluid pressure which is closed only when simultaneously, the pressure to be measured is at least equal to a predetermined threshold and is substantially stable. A deformable member deforms under application of pressure of the fluid being measured and closes the electrical circuit. When fluid is moving through the apparatus, a Venturi valve member functions to lower the pressure of the fluid in contact with the deformable gauge member to reopen the electrical circuit. The Venturi valve member is formed by a revolution cone disposed in a chamber such that the passageway located annularly around the cone is reduced. A measuring apparatus integral with a deflating-inflating assembly is also provided.

Abstract: In order to connect fibers so as to ensure high efficiency of light transmission through connectors, fiber ends must be centered in terminals with a high degree of accuracy. In the proposed connector, each fiber terminal serves as a mold for the injection of a polymer or a fiber-retaining adhesive. A simple geometrical device is employed for centering the fiber end within its terminal, accuracy of centering being ensured solely by the device itself without being dependent on precision-machining of the terminal.The invention is applicable to either single or multiple connectors employed in optical-fiber data-transmission systems.

Abstract: A contact element of the self-stripping type, bearing two slots (15) and (17) into which the wires are radially introduced, and an additional radial anchoring slot (19) in the form of an interrupted ring of which the sides are elastic, due to a resilient region (D), and comprise regions (A, B, C) for introducting, shaping and radially anchoring the wire.

Abstract: A contact element to be supported in the insulating block of a connector provided at its rear portion (18), with piercing and anchoring slots (30), and (31), located on a parallelepiped structure with three folds (20), (21), (22), closed by a tenon (26) and a slot (27).