Clinical Tips on Dental Curing Light

Dental curing lights, and the science behind them, have seen amazing growth and changes in the last few years. Here’s a look at some of the amazing things that have happened and why you should be aware of them.

The need for a reliable and effective curing light has grown as resin composites and light-cured materials such as sealants and adhesives have grown in popularity. Today the dental curing light is a key part of any dental practice’s armamentarium.

There are many options to consider when selecting the right curing light for your dental practice, but the focus of your search should be to find a light compatible with your preferred restorative materials. A light that operates at a variety of wavelengths will cure the largest number of materials, but it remains important to inquire if the light you want to purchase will work with the photoinitiators in the materials you use. Beyond the actual light the unit produces you also will want to decide if a cordless model is a good fit for you practice.

Another consideration is the body style of the light with pistol grip and wand styles the most common options. The light you choose should be comfortable in your hands and easy for you to maneuver so you can cure restorations throughout your patients’ mouths. A final consideration should be the construction of the light and the warranty backing its performance. You want to be sure your light will work whenever you need it.

Minimize heat by having the assistant direct a stream of air or a high-volume vacuum over the tooth crown during light curing. Placing a wet cotton roll directly on the tooth crown opposite the side of exposure will also lessen temperature rise, but not to the same extent as using air.

Minimize direct exposure to light sources using effective “blue-blocking” eyeglasses or shields for the clinician and patient.

Determine the loss of beam intensity with distance by holding the light guide at different distances from a dental curing radiometer. Curing potential of a restorative material depends on total energy received. Determine power at tip end, and multiply that by the recommended exposure duration — the product is the light energy intensity delivered. When moving the tip away, measure that power level and divide it into the light energy intensity calculated above. The result will be the exposure duration needed to account for power loss with increasing distance.

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Básicamente podríamos dividir a las lámparas de fotocurado en

Lámparas halógenas – Luz incandescente –  convencionales: 360 a 500 nm.Y de alta potencia: superior a 500 nm.:Son lámparas de cuarzo de tungsteno, en este tipo de lámparas la luz es emitida por un filamento generando una luz blanca que pasa a través de un filtro transformando la luz en una luz azul capaz de activar las canforoquinonas de los equipos odontologicos. De este proceso se genera la liberación de calor producto del 95% de la luz que son rayos infrarrojos, es por esto que traen incorporado a su estructura un ventilador mecánico para disipar el calor.  Para la mayoría de los composites o resinas compuestas su fotoactivador es la canforoquinona cuyo pico de excitación ronda lo 460nm. Por lo que estas lámparas trabajan los composites sin problemas.

Lámparas de arco de plasma – Luz de arco o xenón – 460 a 480 nm.:
El plasma es básicamente materia gaseosa altamente ionizada. La luz se genera mediante una descarga eléctrica en forma de arco voltaico entre dos electrodos de tungsteno, el gas xenón que se encuentra en este arco evitará la evaporación de los electrodos y tras este proceso no se produce liberación de calor lo cual es una de sus ventajas. La intensidad de la luz puede ser el doble o el triple de la luz halógena convencional, sin embargo, debido a esta potencia la contracción que se generan en las resinas compuestas o composites es también mayor por lo que no han tenido tan buenos resultados clínicos.

Lámparas de polimerización laser – Luz de argón o de diodos – 488 a 904 nm. L: Light A: Amplification S: Stimulated E: Emision R: Radiation:
Su característica principal es el tipo de fotón producido, permanece constante en la misma frecuencia generando una mayor potencia y áreas más concentradas y más pequeñas, entre sus ventajas destaja la baja producción de rayos infrarrojos traducido en menor calor. Su efecto sobre la polimerización correcta de los composites es hoy en día cuestionable ya que su potencia se encuentra por encima del pico de excitación de las canforoquinonas.

Lámparas de fotocurado LED. – Luz emisión de diodos – 450 a 480 nm. – L: Light E: Emitting D: Diode:
La luz en estos casos es emitida a través de un diodo que no es más que un semiconductor que facilita el paso de luz en un sentido, desde el ánodo hasta el cátodo y lo dificulta en sentido contrario. Dentro de sus ventajas se encuentra que no requieren ningún tipo de sistema de refrigeración en su estructura debido a que no liberan calor en la producción de la luz, haciéndolas también más silenciosas.

What you should know before purchasing curing light

The selection of a curing light for sale that fits your style of practicing remains one of the most important equipment purchases you will make. If you have an active restorative practice, it is a device that you use virtually every time you treat a patient. The right light can help you achieve success, while the converse is true – the wrong light can make your efforts more tedious and your results less consistent.

Dental curing lights allow us to initiate the polymerization reaction “on demand” for a vast array of materials. However, there is, perhaps, more misinformation and hype regarding this type of equipment compared to just about anything else we use on a daily basis. Most of these controversies center on how long you have to cure specific types of restorations as well as how deep you can cure specific types of materials.

Manufacturers continue to make outlandish claims of their curing capabilities, most of which fall into the “too good to be true” category. An example is the claim that a new light can accomplish a “5mm depth of cure in 3 seconds”. Please don’t be fooled by these ads – you absolutely, positively cannot cure a composite in three seconds. Period. End of discussion.

If you undercure a restoration, for example, you may not even be aware of the negative sequelae for years. Therefore, selecting a curing light and using it properly can greatly affect the performance and longevity of your restorations.

Types of Dental Curing Lights
Halogen
Use a halogen bulb as the source of light.

+ Reliable – long track record

+ Cures all materials due to wide bandwidth (400nm-510nm)

– Requires a cord due to power consumption

– Cooling fans are necessary and can be noisy

Plasma Arc
Bulb is really an aluminum oxide, high pressure vessel, which contains highly energized xenon gas (plasma) under 150psi. The inside shape is specific to reflect light arcing between two electrodes. Arc is only about 1mm long, enabling a very focused beam.

+ Very fast (when a small tip is used)

– Expensive

– Large base units

– May not cure all materials

– Requires a cord that may be liquid-filled, may be stiff, and can degenerate over time

Argon Laser
Generates light when energy is applied to an atom raising an electron to a higher, unstable energy level. Electron will return to stable level by releasing light through a medium of argon gas.

+ Fast

– Very expensive

– Large base units

– Small tips

– May not cure all materials

– Require a cord due to power consumption

LED (Light Emitting Diode)
Special diodes (electronic devices that restrict current flow chiefly to one direction) that emit light when connected in a circuit.

+ Cordless or corded

+ Lightweight

+ Small

+ Long battery life due to the low power usage

– May not cure all materials

– Some have poor and/or no selection of tips

– May shut down due to overheating during long curing intervals

Women Could possibly get Whiter Teeth aware of New

When you’re a teenager, your the teeth are normally bright as well as white. Even though you eat sugary drink and food sugary drinks for example soda your own teeth may still stay sparkly. Even failing to remember to clean your teeth frequently does not appear to affect the colour of your own teeth when you’re young; these people stay whitened and gleaming. Your the teeth appear healthy as well as your smile appears stunning. Many individuals greatly dislike the truth that as a person age therefore do your own teeth, as well as their beautiful white colour slowly ends. (dental curing light for sale)

The acid within the food a person consume can make the whitened shiny enamel in your teeth erode so that your teeth turn out to be yellow rather than white. Should you consume much more sugary ingredients than you need to, and additionally if you don’t brush your own teeth which often, your teeth might even turn dark brown. When you’ve teeth this particular color you can easily be delay smiling simply because your dental supplies the teeth look harmful, and consequently your self-confidence often reduces. You could possibly get teeth whitening treatment in the dentists although it’s a pricey process. Recently a brand new option is becoming available towards the public- house teeth whitening kits that can Ultrasonic Scaler come at a reduced price. The technologies in these types of kits is equally as effective since the treatment you receive at the actual dentist and it is very safe to make use of. The items are simple to administer as they don’t involve teeth trays or even teeth pieces.

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Can Blue Dental Curing Light Hurt Your Eyes?

About the Blue Dental Curing Light

Before I answer Christopher’s question, here’s a little background information for those who aren’t familiar with the blue dental curing light. When a dentist puts a white filling (or a sealant, or a light-cured filling material) in your mouth, it is in a liquid or semi-solid state so that the dentist can put it exactly where it needs to go and shape it correctly. In order for the material to harden so that it can withstand the forces of chewing, it needs to be cured.

Curing the material is accomplished by shining a blue light on it. Not just any blue light will do. It has to be a certain shade of blue.

The blue dental curing light emits light at a wavelength of around 450 to 490 nm, a blue light. You can read more about the visible light spectrum here.

The very first light-activated filling materials used ultraviolet light. Fortunately, today dentists only use materials that are cured by visible light as the use of UV cured materials has pretty much died out due to the dangers posed by ultraviolet light.

The Blue Dental Curing Light Can Hurt Your Eyes!

One of the major dangers of the blue dental curing light is that it can hurt your eyes! When we were learning how to do white fillings, our professors always advised us to never look at the blue light.

Here’s what the book Craig’s Restorative Dental Materialssays about this:

Although there is minimal potential for radiation damage to surrounding soft tissue inadvertently exposed to visible light, caution should be used to prevent retinal damage to the eyes. Because of the high intensity of the light, the operator should not look directly at the tip or the reflected light from the teeth.
The orange filter that you can see on the curing light above filters out the visible light, allowing the dentist or assistant to see what they are doing without looking directly at the light.

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