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The dental LED curing lights use LED’s that produce a narrow spectrum of blue light in the 400–500 nm range (with a peak wavelength of about 460 nm), which is the useful energy range for activating the CPQ molecule most commonly used to initiate the photo-polymerization of dental monomers."
The first light-curing units used ultra-violet light to set the material, however this method had a limited curing depth and was a high risk to patients and clinicians. [4] Therefore, UV light-curing units were later replaced by visible light-curing systems employing camphorquinone as the photoinitiator. [4] The Traditional Period
Light-cured – required a curing lamp to complete set; Dual-cured – can be light cured at the restoration margins but chemically cure in areas that the curing lamp cannot penetrate; Self-etch – these etch the tooth surface and do not require an intermediate bonding agent; Resin cements come in a range of shades to improve aesthetics. [8]
A photopolymer or light-activated resin is a polymer that changes its properties when exposed to light, often in the ultraviolet or visible region of the electromagnetic spectrum. [1] These changes are often manifested structurally, for example hardening of the material occurs as a result of cross-linking when exposed to light.
Dental sealants were first introduced as part of the preventative programme, in the late 1960s, in response to increasing cases of pits and fissures on occlusal surfaces due to caries. [9] This led to glass ionomer cements to be introduced in 1972 by Wilson and Kent as derivative of the silicate cements and the polycarboxylate cements. [ 5 ]
UV LED Nail Lamp. Featuring a near-perfect rating on Amazon and over 49,000 customer reviews, this best-selling nail lamp uses a built-in sensor and adjustable timer to cut down on drying time.
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