Light Cure Units

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  1. 3M Unitek Ortholux Luminous Curing Light
    3M Unitek Ortholux Luminous Curing Light
    Regular Price ₹89000 Special Price ₹80642
    As low as ₹78748
    Stainless steel
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Buy Dental Light Cure Units Online in India



The increase in the number of patients seeking more esthetic restorative treatments. This has led to a sharp increase in composite resin restorations compared to the amalgam restorations that were quite common in the olden days. In a day when composite resin restorations have probably replaced the use of amalgam as a restorative material, there is a necessity for stronger bonding properties of composite resins. Research into this matter had let to various techniques to improve the  bond strength at the tooth-restoration interface. In addition to improvements made in the bonding agents, light cure units have been improved to ensure adequate polymerization of the composite resin material. The factors such as intensity of the light, exposure time and wavelength as related to the type of photoinitiator used in the composite resin material, affect the rate and depth of polymerization. Few studies have concluded that almost 37% of composite restorations are insufficiently polymerized, owing to a lower intensity of light from the light cure unit. Thus, there is a need for high quality curing units to enhance the overall restoration.

Three international studies were conducted to measure the intensities of light cure units used by dentists. It was concluded that about 33% to 48% of the lights used in clinics were found to use light curing units with intensities lesser than 300mW/cm2.


What are the different types of light curing units?

Light curing units used in dentistry can be classified as:

  • Quartz Tungsten Halogen (QTH) Lights
  • Plasma Arc Lights
  • Argon Laser Lights
  • Light-Emission Diode (LED) Lights


Quartz Tungsten Halogen (QTH) Lights:

The QTH lights contain an incandescent lamp containing a tungsten filament. The tungsten filament is placed in the lamp hoarding an inert gas and a small amount of halogen. Electric current results in the filament heating upto 2727oC. This creates visible light and infrared radiation, which when absorbed by the composite resin results in great molecular vibration and heat generation.  The light is filtered to around 390nm to 500nm, capable of curing all composites. However, the challenge is that only 9% of the total energy is used.


Plasma Arc Lights:

Plasma arc curing lights have an aluminium oxide high pressure bulb, containing pressurized xenon gas under 150 psi. These units have an inside shape which is specified to reflect the light between two electrodes and 1mm long arc which enables a very focused beam. The limitations include emission of infrared and ultraviolet radiation. Plasma Arc Lights are expensive and might not cure all photoinitiators.


Argon Laser Lights:

Argon laser lights generate light when energy is applied to an atom, which raises an electron to a higher and unstable energy level. The electron returns to its stable level and releases light through a medium of argon gas. These lights containing large and have base units are not portable. Small tip sizes necessitate multiple curing cycles. Fast curing cycles cause a large increase in temperature and a considerable amount of shrinkage, which may lead to post-operative sensitivity.


Light Emission Diode (LED) Lights:

The application of LED lights in polymerization of composite resins was an advancement in dentistry. These lights have gone through multiple generations. The first generation of LED light curing lights had a narrow spectrum of emission. They could only activate camphorquinone and no other photo-initiators. Moreover, they could not completely polymerize certain composite materials. Their power and energy output being low, made longer curing times necessary. Having a small footprint, the light tips had insufficient continuous operation before shutdown. The subsequent generation of LED light cure units however, had a higher photon energy output. The limitation here is the one colour chip with a narrow emission spectrum which does not cure all composites. 


Pros and Cons of different LC Units

Curing Light



Quartz Tungsten Halogen (QTH)

Low cost

Long history of use

Low efficiency

Short service

High temperature

Filters required

Plasma Arc

Shorter polymerization time

Low efficiency

High temperature

High cost

Argon Laser

Low heat generated

Inadequate curing due to high curing speed



Does not need filters

High efficiency

Long service life

Consistent output

Quiet operation

Narrow spectrum of emission


What are the brands selling Light Cure Units online?

Brands such as Ivoclar Vivadent, Bestodent, Woodpecker, DiaDent, Skanray, Coltene, IDS Denmed, SK Dent, Dent America, 3M ESPE and many other sell Light Curing Units online at


Why buy Light Cure Units online at

At you can find the best prices in the country for all your dental supplies. We take special care in ensuring that all the products listed on the website are genuine and are of standard quality. This is made certain by procuring all the products from only trusted manufacturers and vendors. With various modes of payment available, such as Cash on Delivery, Credit Card, Debit Card, Net Banking and Paytm, PinkBlue works towards getting all products delivered on time to the dental surgeons. is the one stop shop for all your dental supply needs.