摘要:
Instead of a bunch of bristles coated with abrasive particles, the brush for surface treatments in restorative dentistry comprises one or several lamellar abrasive elements. In the manner of a lametta strip, the abrasive elements are divided by at least one incision, such that a plurality of bristle portions is obtained. Due to the planar configuration of the bristle portions themselves, the latter are easily bendable in at least one direction. If the arrangement of the abrasive elements is such that this direction of easy bending ability is approximately tangential to the intended rotational direction of the brush, the overall flexibility of the brush is substantially increased, thus allowing a substantially improved compliance with application-specific requirements.
摘要:
A material is proposed as an essential abrasive component for cleaning agents in cleaning products for delicate surfaces which is essentially composed of platelets. These platelets are preferably shaped without sharp points, i.e. their circumference is similar to a polygon whose corners do not show angles that are in the majority smaller than 30° and greater than 330°. Glass flakes are for example such a material. The abrasive component of the invention may for example be used for the manufacture of toothpastes and prophylaxis pastes that are efficient but nevertheless not harmful to teeth.
摘要:
The interdental wedge is particularly intended for use in the insertion of approximal fillings of light-curing synthetic materials and consists of a combination of a wedge body and an underlying compressible sole comprising a rim which projects on both sides of the wedge body. The sole portion is preferably made of a thermoplastic elastomer and the wedge body of a translucent synthetic material. A wedge of this kind provides a strong spreading force, and the two rims are deformed when inserted, thereby ensuring a firm retention and a tight application of the matrix to the dental anatomy, and they form sealing lips in order to keep away the saliva from the treated area and to gently displace the papilla.
摘要:
In the method for the manufacture of dental tools for the treatment of surfaces, a rubber core serving as a carrier layer is first applied by injection molding onto the spindle of the tool, and the abrasive layer comprising the abrasive grains is subsequently applied to the carrier layer. In another method for the manufacture of dental tools for different treatments of surfaces, more particularly for coarse grinding, finishing, and polishing, rubber-elastic masses of different degrees of hardness are used for the abrasive parts of the tools according to the intended treatment, and abrasive grains of the same size are embedded in the rubber-elastic mass of these parts. In a preferred method, the two mentioned methods are combined to create dental tools which either comprise a combination of a carrier layer and of a plurality of overlying abrasive parts having different degrees of hardness and the same grain size, or which consist of a set of tools comprising respective tools composed of a carrier layer and an abrasive layer having different degrees of hardness of the embedding mass but the same grain size of the abrasive grains.
摘要:
A dental care composition for the prophylactic dental hygiene (prophylactic paste) comprises as principal components the following: from 10 to 80% by weight, preferably from 35 to 55% by weight, of a polishing body containing plate shaped rock particles, preferably perlite particles; from 20 to 80% by weight, preferably from 40 to 50% by weight, of a nonionic, preferably polymeric surface active agent; and from 0 to 20% by weight, preferably from 1 to 10% by weight, of an emulsifier or emulsifier blend. Polyethylene glycols (Macrogol) having molecular weights of from 200 to 1,000, preferably of from 200 to 600, are particularly suited as pure compounds or as a blend of different variants having different molecular weights. The dental care composition shows a smooth and soft consistency and has only a weak tendency of being splashed during its application in the mouth.
摘要:
The dental device comprises an abrasive disk having a hub made of synthetic material and a spindle with a collet, the opening of the hub having an inner bead and the collet a rotation lock and an axial lock for receiving said bead in the hub opening, the greatest diameter of the spindle with its rotation lock being greater than the diameter of the hub opening with its bead. This construction allows, on one hand, an easier mounting of the abrasive disk on the spindle, and, on the other hand, a high torque transmission.
摘要:
The interdental wedge for the use during the insertion of approximal fillings of light curing synthetic material comprises the combination of a sole portion having disposed thereon an insert of a light conducting synthetic material and a light conducting element, such as a light reflector, to conduct the light necessary for curing and coming from the front surface of the wedge on the filling. The sole portion consists of a material which is compressible and requires strongly increasing forces for further compression; thus, the wedge can snugly fit to the approximal contour of the tooth to be treated and exert sufficiently high separation forces. Preferably, the material of the sole portion is wood whose fibers are preferably aligned in lengthwise direction of the wedge, and/or a synthetic material having included therein compressible filler particles. Thermoplastics and thermoplastic elastomers are preferred synthetic materials. Such a wedge combines the advantages of wood or a synthetic material having similar compression characteristics for a good adhesion of the wedge and sufficient separating forces, with the advantages of a wedge made of a light conducting synthetic material, in order to bring about or to accelerate the curing of the synthetic filling.