Dental furnace

Patent metadata

Field	Value
Publication number	US-10111282-B2
Application number	US-201414180570-A
Country	US
Kind code	B2
Filing date	Feb 14, 2014
Priority date	Jul 25, 2011
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

This invention relates to a process for controlling a dental firing furnace in which a temperature in a firing chamber of the dental furnace is detected by means of a temperature sensor, and in which a heating element that is controlled by a control device controls the heating of the firing chamber of the dental firing furnace based on the measurement result of the temperature sensor. In this process a dental restoration part is received within the firing chamber of the dental furnace. The heating is controlled so that the dental restoration part reacts exothermically, emitting additional heat. The additional heat is detected by the temperature sensor which is pointed at the dental restoration part and the control device delivers at least one signal representing the additional heat, such as in the form of a display signal and/or control signal.

First claim

The invention claimed is:

1. A process for controlling the heating cycle of a dental restoration part in a dental furnace comprising
heating the dental restoration part comprising a ceramic material and a binder in a firing chamber of the dental furnace, wherein the dental restoration part reacts exothermally, emitting additional heat,
detecting a temperature in the firing chamber of the dental furnace by a temperature sensor,
controlling the temperature of the firing chamber by a heating element that is controlled by a control device based on a measurement result of the temperature sensor,
wherein the additional heat is directly detected by the temperature sensor which is pointed at the dental restoration part, wherein quantity of the additional heat is detected in order to prevent the dental restoration part from heating up too fast,
wherein the control device delivers at least one signal representing the additional heat, and
wherein, after the signal is delivered, the control device adjusts a temperature increase in the firing chamber created by the additional heat, to a lower temperature, and
after a trigger temperature is met, a firing cycle is initiated on the dental restoration part.

2. The process as claimed in claim 1 , wherein the signal representing the additional heat comprises one or more of a display signal and a control signal.

3. The process as claimed in claim 1 , wherein adjusting the temperature increase comprises one or more of reducing and switching off the power supply of the heating element.

4. The process as claimed in claim 1 , wherein the temperature sensor comprises an infrared camera and detects the temperature increase during the exotherm reaction of the dental restoration part and transmits the respective output signal to the control device.

5. The process as claimed in claim 1 , wherein the binder reacts exothermally during the heating of the dental restoration part and wherein the exothermal additional heat of the binder of the dental restoration part is detected by the temperature sensor.

6. The process as claimed in claim 1 , wherein the exothermal reaction is a crystallization process and wherein crystallization energy is detected as exothermal additional heat and is compensated by the control device of the dental furnace.

Assignees

• Ivoclar Vivadent Ag

Inventors

• Jussel Rudolf
• Kettner Philipp

Classifications

• H05B1/025 Primary

  For medical applications · CPC title

• F27D11/12

  with electromagnetic fields acting directly on the material being heated · CPC title

• G05D23/27

  with sensing element responsive to radiation · CPC title

• F27B17/025 Primary

  for dental workpieces · CPC title