Machine Translated by Google View of light Advice and guidelines in the field of lighting, optical aids and displays in dentistry

Machine Translated by Google ADVICE AND GUIDELINES ON LIGHTING, OPTICAL TOOLS AND SCREENS IN DENTISTRY

Machine Translated by Google In the Prevention Study funded by Movir Probe are in the second half of the nineties The work in the dental practice is high The dentist's work places high demands on it 1,249 dentists visited. Based on the time requirements for the dentist's eyesight and on Based on existing insights into lighting, light measurements were the eye-hand coordination. This turns on the lighting performed. It was found in 75% of the measurements the practice room must meet special requirements. That that the method of lighting and the associated use of colors in the treatment room also...

Machine Translated by Google RELIEF Good lighting contributes to optimal visual task performance, visual comfort, working method and attitude to work. To be able to understand more of the opinions that come out the TNO research, will first be briefly discussed number of basic concepts. Optimal visual perception perceiving on the border of what is visual Often the dentist has to observe on the border of what With regard to the concept of light, a distinction can be made between daylight and artificial light. visually possible. Light is primarily a facility to make the human environment clearly...

Machine Translated by Google The table shows the influence of age on Light and visual acuity An image 1,4 consisting of a collection of luminances is imaged on the retina. This depends on the amount of light reflected from different surfaces to the eyes. The retina can therefore locally process high and low luminances. visual acuity. Because dentists perform work on the border of the perceivable, timely correction with aids is important. relationship visual acuity and luminance Research shows that visual acuity decreases at low and high luminances. It appears that using too much light causes...

Machine Translated by Google annoying glare masking glare When using strong light sources, such as the dentist's lamp, strong reflection is due to the use of too high illuminance is of course undesirable. Instead of a good picture of the tooth, the dentist would after all one image of the light source. Reflections are bad for the dentist because of the flare because it adversely affects vision and can lead to it to glare, which entails two disadvantages, namely “annoying glare” and “masking glare”. These concepts are explained later in this booklet discussed. Each afterimage gradually disappears,...

Machine Translated by Google daylight is important for good color perception White light has a high color temperature and yellow to orange light has a low color temperature (this light contains relatively little blue). At very high color temperatures the color turns slightly blue. In the dental office lighting for good color perception needed that contains all the colors (especially enough blue) and therefore approaches daylight. Color Rendering Index The color rendering index of the light source indicates in to what extent with the light of this colors true to life to be displayed. A good color...

Machine Translated by Google Napkins that also cover both shoulders covered are recommended. This is because of brightness differences in the field of view due to, for example become dark or very light clothing for the patient cancelled. By using a cofferdam that does not gloss can be quite a brightness reduction in the mouth be obtained. Don't use reflective ones suction cannulas. The lighting of the work area The dentist lamp To enable the dentist to clean the mouth properly be able to work needs a certain amount of light from it stand out in the field of work. In the mouth, the reflections...

Machine Translated by Google lamp arm that extends to about 45 cm beyond the back of the unextended head restraint, with the backrest positioned horizontally. The dentist is used to the dental lamp usually above the patient's chest places. The result is an uneven relief in the mouth (see inset) and on the preparation field which is tiring for the eyes. In addition, the mouth opening is directed too far forward placed, which forces the dentist in to sit in a bent position. In addition, when moving the hands, by the hands or the instrumentation, cast a shadow with reduced view of the work surface....

Machine Translated by Google General lighting and use of color basic lighting conditions This could be the case when the luminaires are too Objective of the general lighting is the whole installed close to a wall. Using it to make the space of the practice room usable as of a light controller for ambient lighting workspace. This includes light wall and ceiling colours. White, off- are important for a particular adaptation to a white or light colors are required stronger outdoor lighting (but one should avoid to obtain the correct luminance ratios and the that the outside light disturbs the luminance...

Machine Translated by Google You can see the difference in these photos the effect of a wall before and after to be able to maintain luminance ratios and thus fitting the lighting with daylight fluorescent a stronger or tiring adaptation of the eyes tubes and applying a light prevent. This apart from the influence on the color rendering index. On the left picture, with the old situation is In the field of view of the dentist it is better not to have any window. This is due to the strong differences in brightness caused the reflection of the fluorescent lighting in it a window in the field of...

Machine Translated by Google It is therefore not immediately certain whether the existing dental lamp is suitable for a color determination. Also steps changes due to the aging of halogen lamps on. This can also be the case when other than before the lamp manufactured halogen lamps are used. Fluorescence must be taken into account of fillings in people exposed to fluorescent light (disco) stay. This can be done with blue (UV) fluorescent tubes being watched. However, these should not be on for too long due to the harmful UV radiation. There sometimes a counterfeit money detector is used. 5 OPTICAL...