摘要:
The invention relates to a three-dimensional moulded body, in particular a mill blank, composed of a polymer prosthesis material that is suitable for milling machining by means of CNC and/or CAD/CAM, having a fracture-toughness greater than or equal to 1.9 MPa.m 1/2 and a fracture work greater than or equal to 900 J/m 2 . The mill blank preferably comprises a core-shell particle modified by an elastic phase and is optionally based on an amount of urethane-methacrylate polymerised therein. The invention further relates to the use of the mill blanks for producing at least parts of dental prosthetic parts, such as a prosthesis, artificial teeth, bridges, or also parts of jaw orthodontic apparatus and instruments in the medical field.
摘要:
The invention relates to a method for producing a dental prosthesis-base semi-finished product (6), comprising the following steps: 1) sensing and digitalizing the oral cavity situation of a patient (1), wherein a digital three-dimensional oral cavity model of the patient (1) is produced, or providing a digital three-dimensional oral cavity model of the oral cavity situation of a patient (1); 2) performing a first calculation, in which a digital three-dimensional first model (A) of a prosthesis base is calculated, wherein the oral cavity model of the oral cavity situation is used as the basis of the first calculation; 3) performing a second calculation, in which a digital three-dimensional second model (B) of a prosthesis-base semi-finished product is calculated from the first model (A) of the prosthesis base, wherein volume is added to the three-dimensional model (A) of the prosthesis base at least in some areas; and 4) producing the dental prosthesis-base semi-finished product (6) by means of a rapid prototyping method, wherein, in the rapid prototyping method, a CAM method is used and the digital three-dimensional second model (B) of the prosthesis-base semi-finished product is used as the basis of the CAM method. The invention further relates to a device for implementing such a method and to a prosthesis-base semi-finished product produced by means of such a method.
摘要:
The subject matter of the invention is a dental composition consisting of a pourable ceramic powder of a powder component, comprising at least one dental glass, glass ceramic, metal oxide, or mixed oxide selected from metal oxides, and/or a mixture comprising at least two of said components, as well as a printing dental ink, and a method for manufacturing dental prosthesis shaped bodies.
摘要:
A device for supporting, on a respective support (5, 22, 27), at least one preformed element (1) of single superstructures (2) for dental prostheses, provided with a threaded ferrule (10) having a hole (11) and an engagement edge (12) outside the preformed element (1), wherein said support has a base (6, 18) provided with a threaded portion (7) suitable for cooperating with said ferrule (10). With respect to the known supporting devices, that forming object of the present invention offers the advantage of not requiring the previous formation of a hole for the insertion channel of the screw in the preformed element. Superstructures can therefore be prepared, in which the channel for the anchoring screw to the implant is produced according to the design specifications and consequently with a variable angulation, in relation to the final position of said channel in the mouth, as established by the doctor. The visible exposure of the closing material of the above-mentioned channel can therefore be avoided, with a considerable aesthetic benefit.
摘要:
A temporary anchoring device between cylinders and spacers of position keys for dental implants composed of cylinders (1) and spacers (2) equipped with means suitable for temporarily holding said cylinders (1) and the mentioned spacers (2) in their relative position, corresponding to that of the dental implant, in which said means consist of a first ring (4) destined for being engaged on the body of said cylinder (1), in addition to a second ring (5) which is engaged on a first spacer (2) of the position key and joined to the previous ring (4) by means of a bar (6). Compared to the systems used in the known art, the device of the invention offers the advantage of being pre-assembled on the spacer, by means of a simple and rapid operation effected outside the patient's mouth. The device of the invention is then also fixed to the respective cylinder situated in the oral cavity, with operations equally as rapid and simple, thus obtaining a temporary anchorage which holds the cylinders of the implant and the spacers forming the position key, in the relative correct position.
摘要:
Aus einer autopolymerisierenden oder kaltpolymerisierenden Zusammensetzung, enthaltend (A) eine flüssige Monomerkomponente, (B) eine pulverförmige Komponente und (C) mindestens einen Initiator oder ein Initiatorsystem für die Auto- oder Kaltpolymerisation, wobei in (A) oder/und (B) mindestens ein Mitglied der Gruppen der aliphatischen Urethanacrylate und der aliphatischen Urethanmethacrylate vorhanden ist/sind, erhält man ein bruchresistentes Prothesenbasismaterial, das nach Härtung insbesondere eine Bruchzähigkeit von > 1,8 MPa*m 1/2 und eine Brucharbeit von > 400 J/m 2 aufweist, und vorzugsweise zudem nach 8 Wochen Lagern in vollentsalztem Wasser bei 50°C eine Differenz im Gelbwert, dem b-Wert, von maximal einer Einheit aufweist. Elastifizierender synthetischer Kautschuk ist bevorzugt nicht vorhanden.
摘要:
A method for automated manufacture of dentures including providing a digital data set of the individual denture to be produced, a digital separation of the model into dental arch and gingival, producing the dental arch from a ceramic or plastic material using cutting technology, producing the denture base through generative or ablative procedures from predominantly (meth-)acrylate-based plastic materials, connecting the dental arch and gingiva through bonding or joining or a combination of bonding and joining.
摘要:
The invention relates to a dental material provided with at least one antimicrobial agent applied to an inorganic particle or to organic polymer pearls, wherein said antimicrobial agent is not covalently attached to the particles or the polymer pearls. As a result, the formation of plaque deposits on the dental material is prevented.