Dental Curing Light: Working Principle & Wavelength

Dental Curing Light: Working Principle & Wavelength

Aug 30,2022

As a pro of the dental field, you not only need to understand how to use the various restorative materials and how the dental equipment procedures. It’s also crucial to fully understand the dental equipment to ensure the to get good results in the various dental surgery.
In this post, Jerry, one of the best dental equipment manufacturers in China, would let you fully understand the dental curing light and which range of wavelength in led curing light is good for which dental procedures.

How Does Dental Curing Light Work

Curing light has been developed into various types to meet the need of the dental curing lights market. Although there are different types of the dental curing light, the working principle is the same. When it is open, the light curing lamp would emit a bright concentrated blue light. This concentrated blue light can activate a photoinitiator ---- a molecule that absorbs light and generate reactive species (free radicals) that initiate polymerization. After that, an individual filling material unit would be converted into connected polymer chains and become solid.

Are Dental Curing Lights Ultraviolet

Initially, the early curing lights use UV wavelengths to cure the filling material. Today, dental curing lights use a narrow spectrum of blue light instead of ultraviolet. Blue light is about in a wide range of wavelengths.

Are Dental Curing Lights Dangerous

During the dental curing process, the blue light is completely safe and is not strong enough to hurt your teeth or gums. But, if your eyes are getting exposed to blue light, it may cause soft-tissue burns and ocular damage. Therefore, the dentist will probably let you wear a form of eye protection.

Dental Curing Light Wavelength

As above mentioned, the curing light tends not to work at a specific wavelength. Most dental curing lights usually are designed to perform in the wavelength range where the blue-light retinal injury takes place. In the following section, the author would list some products to show you the dental curing lights with different wavelengths and show you their differences.

Classic Dental Curing Lights

dental curing lights

These classic dental curing lights perform at the range of the 420-480nm wavelength. It is able to offer 800,1000,1200mW/cm2 in the dental surgery. Therefore, this classic wireless curing light only can be used for curing traditional materials containing (CQ). The dental curing lights offer 3 light intensity modes and working modes. 8 time settings are available in these light curing units dentistry: 5s,10s,15s,20s,25s,30s,35s,40s.

1second Curing Light

1second curing light

This 1second curing light performs at the range of 385-520nm wavelength. So, it can be regarded as a broad spectrum led curing light. With such a broad wavelength, it can relatively cure more resin materials than normal curing light. And this broad spectrum led curing light also gets an upgrade in the light intensity, which is up to 2200mW/cm2. Therefore, the broad spectrum led curing light is the ideal dental equipment for orthodontic bracket bonding, porcelain veneer bonding, and aesthetic resin filling and restoration.


All in all, the broad spectrum led curing light is able to cure more types of filling materials, and the classic dental curing light with 420-480nm spectrum, only can be used for curing traditional materials containing (CQ).

Jerry, is a professional dental equipment supplier trusted among worldwide clients. Jerry is the first one to launch curing light with curing and lighting functions and a dental curing light with orthodontics use and caries detector function in China dental curing lights market. Therefore, you can always trust our capability of design and manufacturing. If you are finding the best dental equipment manufacturer, Jerry would be your first choice.
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