Lights that cure the resin used to fix cavities.
Curing lights are visible LED light units that use a quartz-tungsten-halogen (QTH) bulb. This produces a filtered blue light. Resin curing lights use high-intensity fast cure. As well as low-intensity slow cure and a combination of both.
First of all advantages to curing composite resins with QTH light. These are on for 40-60 seconds for curing resins. This constant exposure to intense light may cause resin composites to polymerize. Consequently, stresses induced by rapid polymerization compromise the strength of the bonded material. As a result, this can lead to leakage in the tooth structure.
Furthermore, there exists different light technique that reduces the amount of polymerization stress.
- Stepped technique
- Ramp mode
- Pulse delay cure technique
Stepped technique consists of Low-intensity exposure is immediately followed by the high-intensity exposure. Pulse delay technique incorporates a waiting period between exposures. The VIP light from BISCO uses the pulse delay cure technique. This is a 3-second exposure at first, it hardens the composite resin. After a waiting period of three minutes which allows the patient to destress and relax, a 30-second exposure is done. Finally, restoration and polish can be done.
In either case, low-intensity light allows resin induced stresses a chance to dissipate.
Traditional curing lights use 488 nm wavelength blue light. Filtered and passed onto the composite resin to be cured. This generates a large amount of heat and a lot of energy’s wasted. And its intensity is not strong enough. With Argon laser the wavelength is right for the curing of the composite resin. Laser curing is deeper and faster because of its higher intensity. Studies have shown that laser curing of the composite resin is more complete. This will lead to less postoperative sensitivity and discomfort.
Plasma Arc System
Newer resin composite formulations have an impressive hardness. As a result, they allow marginal adaptation and better control of internal stresses and internal tension, therefore, reduces the degree of shrinkage. Rapid polymerization reduces the time of exposure to less than 5 seconds. This improves patient comfort and reduces the time needed to complete the procedure.
Lasers and plasma arc lights produce the highest heat increase. Compared to halogen lights that produce most temperature increase within the pulp.
Light curing units are an indispensable part of dental clinics. There cordless and utilize a base charger.
Curing light output range measures nanometers. Furthermore, composites use camp Horo quinone(CQ) polymerizing initiators. These activate by light emitted in and around 468 nm. Opposite to other composites, like flowable resins, which need initiation in the 429 nm range.
Finally, wand tip diameters should extend beyond the margins of the restoration. A larger restoration requires a wand tip that illuminates the entire surface. A porcelain or direct veneer requires the largest wand tip, 12mm or wider.
So schedule an appointment with us soon to find out more about technologies used in our procedures. As well as how they work to give you a better, brighter and healthier smile.