[go: up one dir, main page]

WO2018215489A1 - Éclairage de la zone de travail pour les zones de traitement dentaire - Google Patents

Éclairage de la zone de travail pour les zones de traitement dentaire Download PDF

Info

Publication number
WO2018215489A1
WO2018215489A1 PCT/EP2018/063416 EP2018063416W WO2018215489A1 WO 2018215489 A1 WO2018215489 A1 WO 2018215489A1 EP 2018063416 W EP2018063416 W EP 2018063416W WO 2018215489 A1 WO2018215489 A1 WO 2018215489A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
illumination
composite
wavelength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/063416
Other languages
German (de)
English (en)
Inventor
Albrecht VON BÜLOW
Michael Gente
Flavio KRUG
Saeed MOHAMAD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philipps Universitaet Marburg
Original Assignee
Philipps Universitaet Marburg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philipps Universitaet Marburg filed Critical Philipps Universitaet Marburg
Publication of WO2018215489A1 publication Critical patent/WO2018215489A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0638—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements providing two or more wavelengths
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0653—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements with wavelength conversion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0684—Endoscope light sources using light emitting diodes [LED]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/088—Illuminating devices or attachments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B2090/304—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure using chemi-luminescent materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
    • A61B2090/309—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure using white LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/202—Lighting for medical use for dentistry

Definitions

  • the present invention relates to a device for lighting (lighting unit) of the working field during a dental procedure.
  • the field of work may be that location on a tooth to which composite is applied as part of a dental procedure.
  • the present invention relates to a device for illuminating that part of a tooth which is filled with a composite of the tooth hard substance defect caused by caries.
  • Tooth decay is a common disease of tooth hard tissue.
  • composites are light-curable fillers which, for example, are filled into the defects of the tooth hard substance caused by caries. Light-curable composites are also used as an adhesive for securing brackets in orthodontics, for bonding in fillings or for securing dentures.
  • the composite applied in a caries-induced defect is called composite filling.
  • the composites have a viscous-pasty consistency and can thus be modeled to restore a natural tooth contour. This modeling of the applied composite must be carried out with great care in order to obtain a permanently durable composite filling.
  • Conventional dentistry composites include a photoinitiator (photosensitive initiator) which, upon activation by light of a suitable wavelength, initiates the curing of the composite.
  • the photoinitiators are activated by light, so that radicals form. The radicals then activate the curing of the composite.
  • the activation of the photoinitiators and thus the curing of the composite are dependent on the wavelength of the light which is emitted onto the photoinitiators and on the light intensity or the distance of the illumination unit from the photoinitiator.
  • camphorquinone (camphorquinone, 2,3-bornandione, 1, 7,7-trimethyl-bicyclo [2.2.1] -heptane-2,3-dione, empirical formula C10H14O2), which depending on the light intensity with light in the wavelength range from about 380 to 520 nanometers (nm) can be activated.
  • the absorption maximum of camphorquinone is 468 nm, ie in the blue wavelength range.
  • camphorquinone is activated by the illumination with blue light with a wavelength in the range from 430 to 490 nm, because in this range lies the absorption maximum of the Kampherchinons.
  • a dentist wishes to initiate the curing of the composite after activating the composite, activating the camphorquinone, it will typically illuminate the composite filling and thus the camphorquinone with blue light at a wavelength of 430 to 490 nm. Because conventional lighting units for workplace lighting also emit blue light with a wavelength of 430 to 490 nm, camphor quinone is already activated at the workplace lighting and thus triggers the hardening of the composite. Currently, conventional lighting units are used for the lighting of the workplace and in contrast for the planned and intended activation of the camphor, after completion of the modeling of the applied composite, special polymerization lamps.
  • Camphorquinone has the maximum of its absorption spectrum at a wavelength of 468 nm. Therefore, composites with camphorquinone as a photoinitiator are solidified on the surface by irradiation with white light having a color temperature of 3500 degrees Kelvin and a luminous intensity of 5000 lux within 1 to 2 minutes. since this white light in the blue spectral region has sufficient intensity to activate the photoinitiator. The composite is then no longer modelable. Then, only the final curing of the composite with a polymerization lamp, which activates the photoinitiator with high light intensity, can be performed. Any corrections can then only be made by grinding on the composite filling.
  • the polymerization lamps for camphor quinone preferably emit light at wavelengths around 470 nm.
  • illumination of the working area during a dental treatment is indispensable.
  • the treating dentist must illuminate his field of work well during the treatment in order to be able to apply and model the composite as precisely as possible.
  • This illumination is a significant disadvantage due to the photocurable nature of the composite during processing in the mouth, because the illumination of the working field at the same time more or less strongly activates the photoinitiator and thus initiates the curing of the composite.
  • a dentistry dental unit includes a dental chair for the patient and all appliances, tools, lamps and other devices for dental work.
  • the lamps of a treatment station device may be referred to as lighting units.
  • LED light-emitting diodes
  • the composite can no longer be modeled after 1 to 2 minutes since it solidifies on the surface. For this reason, the treating dentist has only 1 to 2 minutes to properly model the composite functionally and aesthetically. This very short period leads to time pressure and stress situations at the dentist and errors in the modeling of the composite. As a result, there is often a lack of marginal closure of the composite filling with the tooth. The lack of marginal closure causes gaps between the composite filling and the tooth, where bacteria can colonize and cause new tooth decay. The faulty modeling is therefore an essential factor for a reduced quality of the composite filling, which in pronounced forms requires the removal of the entire composite filling.
  • the human eye can best recognize contrasts, bumps, crevices, or other undesirable changes in the composite filling in a field illumination with a bright and white light and fatigues less than with the illumination by light of a different color.
  • the decisive factors for optimal illumination of the dental treatment field are the color and brightness perception of the human eye and the activation potential of the corresponding wavelengths of light on the photoinitiator in the composite.
  • the rods are responsible for the perception of brightness and convey the color impression of the colors white, black and gray.
  • the cones are responsible for color perception.
  • S-pin for blue light
  • M-pin for green light
  • L-pin for red light.
  • the spectral sensitivity is significantly higher in the case of the L cones than in the S and M cones (see FIG. This means that the light intensity in the S and M cones must be higher in order to trigger the same stimulus as with the L cones. If all pin types are excited with the same light intensity, then a white color impression is perceived.
  • the yellow light has a wavelength that does not or only slightly activates the photoinitiator camphorquinone in the composite.
  • the composite can be modeled when illuminated with yellow light.
  • the yellow light is unpleasant for the human eye.
  • the contrasts are at little pronounced yellow light, so that details and fine contours are poorly visible to the human eye. Therefore, working with yellow light in modeling a composite in dentistry is tiring for the treating dentist and the quality of the modeling is moderate. Avoiding illumination of the working field during the modeling: Some dentists model the composite without illumination of the working field. At the same time, the field of work is inadequately or not illuminated at all, with correspondingly poor results with regard to the quality of the composite filling.
  • fine dusts are formed by the release of the mineral filler particles (diameter from 10 to 400 nm) contained in the composites.
  • the health significance of fine dust has not yet been finally clarified. It is therefore in any case an advantage if as little as possible has to be ground on the modeled and then cured composite filling.
  • the object of the present invention is to provide a device for illuminating the field of work in dentistry (lighting unit), with which both a pleasant and high-contrast illumination of the tooth to be treated is ensured, as well as the activation of the photoinitiator Camphor quinone is delayed in the composite.
  • this illumination unit must emit light that appears white to the human eye with sufficient light intensity so that the treating dentist can directly check the quality of the modeling of the composite filling.
  • this lighting unit must not or only slightly activate the photoinitiator camphorquinone in the composite, so that the composite remains in the viscous-pasty state in order to allow sufficient time for the modeling.
  • This at least one light source 2a emits light having a wavelength below 450 nanometers (nm), so that the activation of the photoinitiator camphorquinone in the composite can occur with a delay.
  • the at least one light source 2a emits light having a wavelength of 440 to 450 nm, so that activation of the photoinitiator camphorquinone in the composite can occur with a delay.
  • the lighting unit 1 comprises at least one light source 2, which is designed to emit as white perceptible light to the human eye, which also comprises at least blue light with a defined wavelength range of 440 to 450 nm and for the illumination of a dental working field suitable is.
  • the illumination unit 1 with the at least one light source 2 emits light which the human eye perceives as white and whose wavelength range triggers no or only a very small activation of the photoinitiator camphorquinone in the composite. This results in a bright, high-contrast and pleasant to the human eye illumination In the field of dental interventions, such as application and modalization of composites, and at the same time extends the modeling time of the applied composite by up to 400% compared to conventional lighting units.
  • S-cones also called blue cone, responsible for the perception of blue light
  • M-cones and L-cones are the most sensitive at a wavelength of 440 to 450 nm. Therefore, only a low light intensity of the blue light is required for the illumination unit according to the invention. Due to the low light intensity of the blue light used and due to the wavelength used of 440 to 450 nm, which is not in the absorption maximum of the photoinitiator camphor quinone, the camphor quinone is activated very little in the applied composite and thus the curing of the composite only one low level started. To the blue light, light with wavelengths greater than 500 nm is additively added, so that a white color impression is created in the eye.
  • the spectral photometric radiation equivalent ⁇ ( ⁇ ) is the quotient of the luminous flux in lumens (Im) and the radiant power in watts (W) of the emitted monochromatic light with a wavelength lambda ( ⁇ ).
  • ⁇ ( ⁇ ) indicates how sensitively the eye reacts to certain wavelengths and how much the corresponding light stimulus is perceived by the eye.
  • Wavelands with a high K (A) value are perceived as bright by the eye, while wavelengths with a low K (A) value are perceived as dark.
  • the intensity of the wavelength range having the lower K (A) value must be increased or the intensity of the wavelength range having the higher K (A ) Value can be reduced.
  • the maximum K (A) value of the human eye for daytime vision is at a wavelength of 555 nm.
  • the intensity of the additively admixed blue light which covers the wavelength range from 440 to 450, can be kept so low, that the photoinitiator camphor quinone is activated only to a very small extent.
  • Red light with a wavelength of 640 to 780 nm does not activate the photoinitiator camphor quinone, so that when using red light for the illumination unit according to the invention, the composite is not cured.
  • Turquoise light with a wavelength of 480 to 530 nanometers activated the photoinitiator camphor quinone only to a small extent, so that when using turquoise light for the illumination unit according to the invention, the composite is cured only to a small extent.
  • the experiments used for example, the composite Grandio SO with the color A2 from the company VOCO GmbH Cuxhafen, which contains the photoinitiator camphorquinone.
  • the lighting unit according to the invention is also suitable for lighting in the application and modeling of any other composite, provided that these composites also contain camphorquinone as a photoinitiator.
  • the method according to ISO 4049: 2000 (E) was used to determine the processing time of the composite used.
  • the composite sample is applied to a slide and illuminated with a lighting unit. After the illumination time recommended by the composite manufacturer, a second slide is pressed onto the composite sample and laterally displaced against the first slide.
  • the thinly pressed composite sample has a homogeneous structure after a short illumination time.
  • the size of the inhomogeneity of the thinly compressed composite sample indicates how far the curing of the thinly compressed composite sample has progressed. In this method, the determination of the curing for different illumination times is possible only by multiple measurements.
  • an acoustic measuring method for continuous recording of the curing was used to determine the processing time of the composite used.
  • This procedure involves using two speakers their membranes mounted parallel to each other.
  • a metal bar is attached to the membrane, which is directed at right angles to the center of the membrane of the second speaker.
  • a glass plate is glued, which serves to receive the composite sample.
  • the free end of the metal rod is about 1 mm from the glass plate.
  • the composite sample is applied between the glass plate and the metal rod in such a way that the metal rod is inserted approx. 1 mm deep in the composite sample.
  • the first speaker oscillates at a frequency of 600 hertz (Hz).
  • the transmitted vibrations are converted into an electrical voltage by the second loudspeaker, which is connected as a microphone.
  • the second loudspeaker Before the composite sample is illuminated, it is plastically deformable and the vibrations of the first speaker are only slightly transmitted to the second speaker. The induced microphone voltage is therefore low.
  • the photoinitiator is activated and curing of the composite is initiated.
  • the composite sample loses its plasticity and becomes superficially firm. This causes a better transmission of the vibrations from the metal rod to the diaphragm of the second loudspeaker and the induced microphone voltage increases.
  • the increase in the strength of the hardening composite and, associated therewith, the progression of the rising microphone voltage represent the superficial hardening process during the illumination.
  • the correlations for the white color impression in the human eye by means of additive color mixing explains the CIE standard valence system (color triangle, CIE standard color system).
  • CIE standard valence system color triangle, CIE standard color system
  • the white point W lies in the area of the color triangle.
  • the connecting lines of at least two spectral colors must intersect, that is, to produce a white color impression, at least two spectral colors must be mixed additive.
  • the connecting line between the turquoise and red color area does not intersect the white point, but only the white-yellow area.
  • blue light has to be added to the turquoise and red color range. For this, blue light with a wavelength of 440 to 450 nm is best suited. Blue light with this wavelength, in combination with red and turquoise, gives the human eye a white color impression because it shifts the line of connection between red and turquoise in the direction of the white point.
  • the yellow LED has an emission maximum at 590 nm, ie outside the absorption range of the photoinitiator camphorquinone.
  • the photoinitiator camphorquinone is not activated and thus the applied composite is not cured. Due to the lack of curing, the induced microphone voltage at the second speaker does not increase. The curing time is therefore by definition not determinable. Thus, the lighting of the workplace with yellow light alone was used as the basis for further experiments.
  • the curing time according to the above-described acoustic measurement method was the time at which the induced microphone voltage begins to increase at the second loudspeaker.
  • the curing time is therefore the period between the start of the illumination of the composite samples and the hardening time.
  • the curing time of the composite samples was with the use of commercially available lighting units (headlamp, loupes) at 2.8 minutes (min). This means that the dentist has only 2.8 minutes to model the composite when illuminating the work area with a commercially available illumination unit. 3. Determination of the hardening time with the acoustic measuring method when using a lighting unit with a yellow LED and a violet LED as the light source:
  • the cure time of the composite samples was 0.33 min using yellow and violet LED as the light source. This means that the dentist has only 0.33 minutes to model the composite when illuminating the work area with a lighting unit with yellow and purple LEDs as the light source.
  • the cure time of the composite samples was 1.05 min using yellow and blue LEDs as the light source. This means that the dentist has only five minutes to model the composite when illuminating the work area with a lighting unit with yellow and blue LEDs as the light source.
  • the curing time of the composite samples was 7.6 min when using yellow and turquoise LED as the light source. This means that the dentist has 7.6 minutes to model the composite when illuminating the work area with a lighting unit with yellow and turquoise LED as the light source. This means that when using yellow and turquoise light sources in a lighting unit, the processing time of the composite is significantly extended. However, when only yellow and turquoise light sources are used in a lighting unit, the light perceptible to the eye is yellowish. In order to change this disadvantageous yellowish light impression to a white light impression, blue light with a wavelength of 440 to 450 nm was additively admixed.
  • the illumination unit 1 can be present in various embodiments in order to emit light with the advantageous wavelength spectrum which the human eye perceives as white and whose wavelength spectrum causes no or only a very small activation of the photoinitiator camphorquinone in the composite: 1.
  • this additionally comprises two further light sources 2b and 2c, which form a common light cone with the light source 2a, wherein the light source 2b can emit light in the wavelength range of 480 to 530 nm, and the light source 2c can emit light in the wavelength range of 590 to 690 nm.
  • the light source 2b emits light with the wavelength 505 nm and the light source 2c light with the wavelength 650 nm.
  • the illumination unit 1 thus comprises three light sources 2a, 2b and 2c which emit the following wavelengths: turquoise (light source 2b with a wavelength of 480 to 530 nm, preferably 505 nm), red (light source 2c with a wavelength of 610 to 690, preferably 650 nm) and blue (light source 2a having a wavelength of less than 450 nm, preferably 440 to 450 nm).
  • the light sources 2a, 2b and 2c are preferably light emitting diodes (LEDs) whose emission maxima are close to or exactly at the wavelengths mentioned.
  • the light emitted from the three light sources 2a, 2b and 2c is mixed by means of additive color mixing to white light.
  • the most commonly used photoinitiator camphorquinone has the maximum of its absorption spectrum at a wavelength of 468 nm (see Figure 2). Due to the turquoise (505 nm) and red (650 nm) light camphor quinone is not or only slightly activated. However, the human eye has a high sensitivity for turquoise, it is primarily the green (M-pin) and secondarily the red receptors (L-pin) addressed. The additive mixing of red and blue produces the desired white color impression in the human eye.
  • the photoinitiator camphorquinone is activated by the admixed blue, according to the invention only the blue wavelength range of less than 450 nm, preferably 440 to 450 nm, is admixed. In this wavelength range is the human eye particularly sensitive.
  • camphorquinone is activated to a certain extent with blue light of the wavelength range from 440 to 450 nm, the activation in this wavelength range is very low (see FIG.
  • the inventive feat consists of finding that wavelength range of the blue light in which, on the one hand, the human eye receives a white color impression due to the additive color mixing with turquoise and red, but on the other hand camphor quinone is activated as little as possible to prevent the curing of the composite delay as long as possible.
  • camphor quinone is activated as little as possible to prevent the curing of the composite delay as long as possible.
  • Illumination unit 1 with a first light source 2a which emits blue light and with at least one second light source 2d which emits light with a wavelength of greater than 500 nm:
  • the illumination unit 1 for the illumination of a dental working field comprises a further light source 2d, which forms a common cone of light with the light source 2a, wherein the light source 2d can emit light in the range of wavelengths 500 to 680 nm.
  • a first light source 2a which emits blue light in the wavelength range below 450 nm, preferably 440 to 450 nm, and at least one second light source 2d, which exclusively emits light with a wavelength of greater than 500 nm to at least 600 nm continuous or nearly continuous spectrum emitted.
  • Additive color mixing also produces white light in this exemplary embodiment.
  • the second light source 2 d it is also possible to use a plurality of different light sources, such as light-emitting diodes, whose emission spectra overlap.
  • the second light source 2d covers the entire spectral range from 500 to 680 nm, ie a continuous spectrum in the visible wavelength range above 500 nm is produced. This results in an almost natural white illumination of the working field.
  • the advantage of this is that by this almost natural white lighting, the colors in the mouth appear unadulterated. As a result, even the color determination of the tooth color is possible by comparison with so-called color rings (platelets with standardized colors).
  • light sources which emit green light in the wavelength range of 520 to 580 nm and red light in the wavelength range of 590 to 690 nm for example green and red LEDs, can also be used as second light source 2d.
  • green and red LEDs can also be used as second light source 2d.
  • an almost continuous spectrum in the visible wavelength range above 500 nm is likewise produced, whereby a color impression which is white to the human eye is produced in combination with the blue wavelength range of the light source 2a.
  • the green and red light sources 2d may be lit only in portions of the above-mentioned wavelength ranges.
  • Illumination unit 1 with at least one light source 2a which emits blue light and appears white by fluorescence:
  • the illumination unit 1 for the illumination of a dental working field next to the at least one light source 2a further comprises a conversion luminescent material that can partially convert light with a wavelength below 450 nm into light of a wavelength above 500 nm.
  • This conversion phosphor is designed so that it can also partially convert light of the wavelength range of 440 to 450 nm into light of a wavelength above 500 nm.
  • Yttrium aluminum garnet YAG
  • alkaline earth ortho silicate BOSE
  • phosphates halophosphates
  • borates borosilicates
  • molybdate tungra mat
  • sulfate aluminate
  • oxides or sulfides such as, for example, zinc oxide, zinc sulfide, zinc
  • Cadmium sulfide and zinc sulfide selenides and silicates such as Wilemitem and Zinkberylliumsilikat be used.
  • An illumination unit 1 designed according to the invention is therefore also suitable for an arrangement in which the light of a light source 2 a, for example a light emitting diode, with an emission maximum in the range of 440 to 450 nm to a certain extent by conversion phosphor (fluorescent substances) in light in the wavelength range of 500 to 650 nm is converted.
  • a light source 2 a for example a light emitting diode
  • Such a light source has an intensity minimum in the range of 455 to 490 nm, ie just in the wavelength range in which the camphor quinone is activated the strongest. Therefore, white light is also generated with this light source for the eye when the intensity ratios of blue component (wavelength range 440 to 450 nm) and remaining light (wavelength range 500 to 650 nm) are suitably matched to each other.
  • the blue light of the light source 2a with a wavelength of 440 to 450 nm excites a fluorescent substance (conversion luminescent substance), which emits the energy absorbed as long-wavelength light with a wavelength greater than 500 nm.
  • a conversion phosphor is a particulate fluorescent organic or inorganic material having one or more emissive centers.
  • the emissive centers are formed by activators, usually atoms or ions of a rare earth element such as La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and / or Atoms or ions of a transition metal element such as Cr, Mn, Fe, Co, Ni, Cu, Ag, Au and Zn, and / or atoms or ions of a main group metal element such as Na, Tl, Sn, Pb, Sb
  • YAG yttrium aluminum garnet
  • BOSE alkaline earth ortho silicate
  • These conversion phosphors can be provided with doping elements which determine the luminous color, for example with manganese for the orange-red or copper for the green fluorescent light component. These conversion phosphors can be applied to the light source as a color conversion layer. This color conversion layer converts the short-wavelength blue light into long-wavelength light. This long-wave light stimulates the D and P cones and creates a white color impression in the eye. At the same time, the intensity of the originally blue light is reduced. In this exemplary embodiment, therefore, the blue light of the light source 2 a having a wavelength of 440 to 450 nm excites a conversion luminescent substance, which emits the absorbed energy as long-wavelength light with a wavelength of more than 500 nm. The conversion phosphors can also be used in the production of light emitting diodes.
  • Illumination unit 1 with a first light source 2a which emits blue light and with two further light sources 2e and 2c which emit light with a wavelength greater than 500 nm:
  • the lighting unit 1 for the illumination of a dental working field comprises two further light sources 2e and 2c, which form a common cone of light with the light source 2a, wherein the light source 2e can emit light in the range of wavelengths 530 to 580 nm and the light source 2c Light in the range of wavelengths 590 to 690 nm can emit.
  • the lighting unit 1 according to the invention can be integrated as a component in a dental treatment station device, or additionally mounted as a retrofit kit for existing dental treatment device devices.
  • the illumination unit 1 according to the invention can also be embodied as a head or headlamp or as a component of a head or headlamp.
  • the lighting unit 1 according to the invention can also be designed as a lamp in a loupe or as a component in a loupe.
  • halogen lamps As light sources 2 for the illumination unit according to the invention, halogen lamps, lasers or preferably light-emitting diodes (LED) can be used.
  • LED light-emitting diodes
  • a light source with a red or yellow LED is used for the illumination during the rough modeling of the applied composite.
  • the photoinitiator camphorquinone is not activated, so that for the rough modeling of the composite an almost unlimited period of time is available.
  • the blue light source with the wavelength range below 450 nm, preferably 440 to 450 nm is switched on. This creates the desired white color impression for the eye.
  • the photoinitiator camphorquinone is activated to a slight extent so that there remains about 8 minutes left for the fine modeling when the blue light is switched on until the composite becomes too hard.
  • the lighting unit 1 has the following circuit diagram for switching the individual light sources 2 on and off: With a first switch, only the light with a wavelength above 500 nm is switched on, that is to say only the red or yellow ones Light sources. This emits reddish-yellowish light, which does not activate the photoinitiator camphorquinone. As a result, the coarse modeling of the applied composite can be carried out virtually indefinitely with this switch position. After completion of the coarse modeling, the blue light source is additionally switched on by a second switch, which produces the desired white color impression for the human eye. The white color impression makes it possible to carry out the fine modeling exactly because the human eye can best recognize details in white light and tire the least quickly.
  • the teaching according to the invention can also be adapted for other photoinitiators if the lighting unit 1 does not emit light in the region of the absorption maximum of the respective photoinitiator. LIST OF REFERENCE NUMBERS
  • Fig. 1 shows the spectral sensitivity curves of the three pin types.
  • the wavelength of the light in nm is indicated on the x-axis.
  • the basic spectral value is indicated on the y-axis.
  • the curve t (A) shows the fundamental spectral value of the S-cones with a maximum at 450 nm
  • the curve d (A) shows the fundamental spectral value of the M-cones with a maximum at 550 nm
  • the curve ⁇ ( ⁇ ) shows the fundamental spectral value of the L-cone with a maximum at 560 nm.
  • Fig. 2 shows the absorption behavior of camphorquinone as a function of the wavelength of the light.
  • the x-axis shows the wavelength of the light in nm.
  • the absorption of camphorquinone is given as an arbitrary unit.
  • the curve shows that camphorquinone is basically activatable with light in the wavelength range of 350 to 500 nm, and that the absorption maximum of camphorquinone is 468 nm.
  • camphor quinone shows only a moderate absorption, in the area so camphor quinone is only moderately activated.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Optics & Photonics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'unité d'éclairage selon l'invention améliore l'éclairage de la zone de travail lors de l'application d'un composite sur une dent. L'unité d'éclairage émet une lumière qui est perçue comme étant blanche par l'œil humain. En sélectionnant les sources de lumière et les longueurs d'onde de lumière émises selon l'invention, l'activation de la camphoquinone comme photoamorceur dans le composite utilisé est retardée, ce qui permet d'obtenir un temps de traitement plus long pour la modélisation du composite.
PCT/EP2018/063416 2017-05-24 2018-05-22 Éclairage de la zone de travail pour les zones de traitement dentaire Ceased WO2018215489A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017111491.2A DE102017111491A1 (de) 2017-05-24 2017-05-24 Arbeitsfeldbeleuchtung für zahnärztliche behandlungsplätze
DE102017111491.2 2017-05-24

Publications (1)

Publication Number Publication Date
WO2018215489A1 true WO2018215489A1 (fr) 2018-11-29

Family

ID=62222692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/063416 Ceased WO2018215489A1 (fr) 2017-05-24 2018-05-22 Éclairage de la zone de travail pour les zones de traitement dentaire

Country Status (2)

Country Link
DE (1) DE102017111491A1 (fr)
WO (1) WO2018215489A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115988981A (zh) * 2020-08-26 2023-04-18 豪雅株式会社 照明系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080002402A1 (en) * 2005-01-14 2008-01-03 Mandikos Michael N Dental illumination device and method
DE102006038504A1 (de) * 2006-08-16 2008-02-21 Sirona Dental Systems Gmbh Zahnärztliche Behandlungsleuchte und Verfahren zur Erzeugung eines Lichtfelds für eine Behandlung mit einem durch Licht aushärtbaren dentalen Werkstoff
DE102012102153A1 (de) * 2012-03-14 2013-09-19 Uwe Giebeler Verfahren und Vorrichtung zur Beleuchtung eines Arbeitsfeldes im Zuge einer medizinischen Behandlung unter Einsatz lichthärtender Werkstoffe
DE102016111082A1 (de) * 2015-06-26 2016-12-29 Panasonic Intellectual Property Management Co., Ltd. Beleuchtungslichtquelle, Beleuchtungsvorrichtung, Aussenbeleuchtungsvorrichtung und Fahrzeugscheinwerfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080002402A1 (en) * 2005-01-14 2008-01-03 Mandikos Michael N Dental illumination device and method
DE102006038504A1 (de) * 2006-08-16 2008-02-21 Sirona Dental Systems Gmbh Zahnärztliche Behandlungsleuchte und Verfahren zur Erzeugung eines Lichtfelds für eine Behandlung mit einem durch Licht aushärtbaren dentalen Werkstoff
DE102012102153A1 (de) * 2012-03-14 2013-09-19 Uwe Giebeler Verfahren und Vorrichtung zur Beleuchtung eines Arbeitsfeldes im Zuge einer medizinischen Behandlung unter Einsatz lichthärtender Werkstoffe
DE102016111082A1 (de) * 2015-06-26 2016-12-29 Panasonic Intellectual Property Management Co., Ltd. Beleuchtungslichtquelle, Beleuchtungsvorrichtung, Aussenbeleuchtungsvorrichtung und Fahrzeugscheinwerfer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115988981A (zh) * 2020-08-26 2023-04-18 豪雅株式会社 照明系统

Also Published As

Publication number Publication date
DE102017111491A1 (de) 2018-11-29

Similar Documents

Publication Publication Date Title
EP0827723B1 (fr) Méthode et dispositif destinés à la polymérisation de compositions polymères sensibles à la lumière
DE19919381B4 (de) Mehrfachverkapselung von LED-Bauelementen
DE10157447B4 (de) Verfahren zum Herstellen einer Weißlichtquelle
DE69003695T2 (de) Verfahren zur Lichtvulkanisation von zur Lichtvulkanisation verwendbaren Dentalharzen und Vorrichtung dafür.
EP2961339A1 (fr) Prothèse dentaire partielle
EP3011949A1 (fr) Materiau dentaire durcissable
EP2897552A1 (fr) Dispositif et procédé destinés à appliquer des composites photopolymérisables
DE102019115276A1 (de) Lichtquelle und System für die und Verfahren zur Fluoreszenzdiagnose
DE112015000144B4 (de) Pressformen eines Zahnersatzes aufweisend Keramik, wie Zirkoniumdioxid, mit einer aufgerauten Oberfläche
DE2202521A1 (de) Farbkorrigierte Hochdruck-Quecksilberdampflampe
WO2012107324A1 (fr) Module de diode électroluminescente
DE112015004032T5 (de) Led-dentallichtquelle mit veränderlicher chromatizität und verfahren
WO2018215489A1 (fr) Éclairage de la zone de travail pour les zones de traitement dentaire
DE3729711A1 (de) Quecksilberniederdruckentladungslampe zur uv-bestrahlung
WO2004082032A2 (fr) Del a conversion de luminescence possedant un effet de phosphorescence et utilisation de ladite del, ainsi que procede de fonctionnement associe
US7314610B2 (en) Dental compositions having anti-stokes up converters and methods of use
WO2008020052A1 (fr) Lampe de traitement dentaire et procédé pour générer un champ lumineux pour un traitement par une matière dentaire durcissable par la lumière
US20060194172A1 (en) Dental compositions having a phosphorescent material and methods of use
DE19934126A1 (de) Leuchtstoff für Lichtquellen und zugehörige Lichtquelle
DE69617539T2 (de) Kontrollvorrichtung für Polymerisierungslampe
DE102012102153A1 (de) Verfahren und Vorrichtung zur Beleuchtung eines Arbeitsfeldes im Zuge einer medizinischen Behandlung unter Einsatz lichthärtender Werkstoffe
DE10125340B4 (de) Dentales Lichtgerät
EP1310218B1 (fr) Appareil de photopolymérisation
DE102017120673A1 (de) Lichtemittierendes Bauelement, Leuchtmittel, Verfahren zum Betrieb eines Leuchtmittels und Konversionselement
DE9116651U1 (de) Entladungsröhre und Steuerung einer diese enthaltende Vorrichtung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18726466

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 18726466

Country of ref document: EP

Kind code of ref document: A1