摘要:
A dental impression tray comprises a mold shell made of synthetic material and having an inner space for receiving the impression material, and a support shell made of metal and surrounding the exterior of the mold shell in order to provide the overall impression tray with the rigidity and dimensional stability required for taking precisely fitting impressions. The support shell may be detachably connected to the mold shell by positive or non-positive engagement. While the mold shell including the impression material is passed on to the technician who will produce a model of the teeth from which the impression was taken and who may subsequently dispose of the mold shell including the impression material, the support shell will remain with the dentist, immediately ready for reuse upon sterilization.
摘要:
A dental impression tray has a wall member which, in the working position of the tray, is disposed on the inner surface facing the jaw, is opposite the dental arch which faces the palate or tongue, respectively, and forms a flow surface for directing impression material into the region between a tooth or stub and the gingiva to prevent voids in the solidified impression.
摘要:
The invention relates to a two-component addition-cured silicon impression compound, comprising the following when both components are mixed: (a) between 1 and 35 wt. % of at least one organopolysiloxane comprising at least two unsaturated groups in the molecule; (b) between 1 and 10 wt. % of at least one organohydrogenpolysiloxane comprising at least two SiH groups in the molecule; (c) between 0.00005 and 0.05 wt. % of at least one platinum catalyst, calculated as elementary platinum; (d) between 4 and 10 wt. % of at least one liquid paraffin or at least one white mineral oil, or of a mixture of at least one liquid paraffin and at least one white mineral oil; (e) between 50 and 90 wt. % of at least one filler, each respective percentage relating to the total weight of the silicon impression compound. According to the invention, one of the components before being mixed with the other component has a Brookfield viscosity ranging between 800 and 2000 Pa*s. The invention is characterized in that the silicon impression compound, when mixed, has a consistency stipulated by ISO 4823 of less then or equal to 35 mm.
摘要:
A mixer is used for producing multi-component pastes at a mixing ratio other than 1:1. A deviating channel 20 is provided between the inlet opening 16 for the component of the larger volume proportion and the mixing chamber, to delay the feed of this component with respect to the other component. The presence of this deviating channel 20 causes all components to enter the mixing chamber simultaneously, thereby obtaining a paste which has the desired mixing ratio from the start.
摘要:
The invention relates to a measuring device which is used to determine the end of the processing time of hardenable materials, especially dental moulding materials, comprising a display unit and a sensor unit which detects a modification of at least one of the rheological properties of the material.
摘要:
A device is provided which determines the end of the processsing time for hardening masses, in particular dental molding masses. The device comprises a display unit and a sensor unit which record the change in at least one of the rheological properties of the mass. A method that can be used with such a device is described.
摘要:
When dispensing a flowable substance from a container by way of a motor driven dispensing device, for ensuring that the container is properly inserted into the device, that the substance is still usable and/or that the dispensing speed is selected in accordance with the viscosity or other properties of the substance, the container is provided with a marking which may be stored in a transponder provided at a front container cap. When the container is properly inserted into the dispensing device, the transponder cooperates with a sensor disposed in an end wall of the device for enabling and/or controlling the dispensing mechanism on the basis of the characteristic data detected.
摘要:
The invention relates to a measuring device which is used to determine the end of the processing time of hardenable materials, especially dental molding materials, comprising a display unit and a sensor unit which detects a modification of at least one of the rheological properties of the material.
摘要:
The invention relates to a dynamic mixer for mixing at least a first paste and a second paste to produce a dental substance, the mixer comprising: a mixing chamber; an inlet opening for the first paste; an inlet opening for the second paste; a first flow path extending from the inlet opening for the first paste to the mixing chamber; a second flow path extending from the inlet opening for the second paste to the mixing chamber; wherein: the first flow path has a minimal cross-sectional area of greater than 4.0 mm2; the second flow path has a minimal cross-sectional area greater than the minimal cross-sectional area of the first flow path.
摘要:
Methods for manufacturing endodontic instruments are provided. Methods relate to milling a blank with a cutting process to shape the instrument. Instruments so produced are also provided.