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Light curing of a dental filling material. A dental curing light is a piece of dental equipment that is used for polymerization of light-cure resin-based composites. [1] It can be used on several different dental materials that are curable by light. The light used falls under the visible blue light spectrum. This light is delivered over a range ...
Camphorquinone, also known as 2,3-bornanedione, is an organic compound derived from camphor. A yellow solid, it is used as a photoinitiator in curing dental composites. [1] Camphorquinone is produced by the oxidation of camphor with selenium dioxide. [2]
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
To induce the release of these free radicals, the photoinitiator must be exposed to a specific wavelength of light, blue light in the case of camphorquinone. [ 1 ] [ 3 ] There is a second less significant acid-base setting reaction which takes place after the light-cured polymerisation reaction; this setting reaction occurs as the compomer ...
A glass ionomer cement (GIC) is a dental restorative material used in dentistry as a filling material and luting cement, [1] including for orthodontic bracket attachment. [2] Glass-ionomer cements are based on the reaction of silicate glass-powder (calciumaluminofluorosilicate glass [3]) and polyacrylic acid, an ionomer.
Musk and Trump previously met with House Republicans in a closed-door meeting in November, where Trump backed Johnson for a second term. This article originally appeared on USA TODAY: Elon Musk ...
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