Dental light curing device
A technology of light curing machine and light source, applied in the direction of dentistry, dental prosthesis, medical science, etc., can solve the problems of cured material shrinkage, cancerous free radicals, edge gaps, etc.
Active Publication Date: 2017-09-26
IVOCLAR VIVADENT AG
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Problems solved by technology
[0009] It should be added in this case that the problem arises when the polymerization is insufficient, that is, the free radicals that are said to promote the formation of carcinogenesis are not completely combined, but on the other hand, the complete curing due to the concentration of a larger amount of material will Causes shrinkage of the cured material, which causes edge gaps to form
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[0035] The output signal of the sensor is reflected in the accumulated form figure 1 Reflected optical radiation PR shown in , the sensor detects optical radiation reflected by an illuminated surface.
[0036] The associated curing light preferably has a plurality of LED chips arranged next to each other in one plane for this purpose. The LED chips are surrounded by a reflector, which may be integral and serves to direct the emitted light to the light entry surface of the light guide.
[0037] A plurality of sensors are arranged on the level of the LED chip, which are connected to the light entry surface of the light conductor via light-conducting optics, wherein individual light-conducting fibers can also be arranged in each case.
[0038] In this modified embodiment, the sensor optics extend through the light guide as a special optical fiber.
[0039] On the opposite, distal end of the light guide, a light exit surface is provided, and on the edge of the light exit surface...
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The invention relates to a light curing device comprising a light source that is arranged in the handheld light curing device and has in particular a plurality of mutually adjacent chips which are arranged next to one another and form a light source and in front of which a light guiding element extends. The light curing device also comprises at least one sensor, which is sensitive to light in the emission wavelength range of the light source, and a controller for controlling the light source during the polymerization process, the sensor being connected to the controller. The controller continuously or at least periodically monitors the output signal of the sensor during the polymerization process and adapts the light output and / or the polymerization time in the event of a reduction of the output signal. The controller adds up the reflected radiation detected via the light exit surface (10) in order to calculate a possible location deviation, and the light exit surface (10) of the light guide is larger than or equal in size to the largest dental restoration (12) to be cured, the light exit surface having a cross-sectional area of more than 1 cm2 in particular.
Description
technical field [0001] The invention relates to a curing light according to the preamble of claim 1 . Background technique [0002] Curing lights for polymerizing dental materials have been known for a long time. Although in the 1990s work was partly still carried out with halogen lamps and a correspondingly broad emission spectrum known to extend into the IR range, around 2000 there were already prevailing curing lights with LED Chip-based and generally emits light with a maximum emission peak around 470 nm, that is to say essentially blue light. [0003] Polymerization is triggered by a photoinitiator matching the maximum emission peak, such as camphorquinone, to achieve polymerization. This can be done statically, that is to say in a fixed-position curing light for curing e.g. denture bases, but usually also by means of suitably designed hand-held devices with which, for example, dental restorations can be polymerized Attaches to the patient's natural teeth. [0004] ...
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IPC IPC(8): A61C13/15
CPCA61C19/004G01J1/0425G01J1/4228G01J1/4257G01J2001/4252
Inventor D·托马西尼B·森恩
Owner IVOCLAR VIVADENT AG