MC Chem Wiki - User contributions [en]

Dental curing devices

2018-02-01T21:46:50Z

Saxonday:

by Saxon Day

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.

The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.

There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Dent1.jpg|800px]]

Figure 1.1: A dental curing device was shot at the Red Tide USB650 UV and the intensity of the light was recorded. The device emitted a maximum wavelength around 470 nm, which would be optimal for the camphorquinone composite that most dentists use.

Dental curing devices

2018-02-01T21:46:40Z

Saxonday:

by Saxon Day
Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.

The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.

There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Dent1.jpg|800px]]

Figure 1.1: A dental curing device was shot at the Red Tide USB650 UV and the intensity of the light was recorded. The device emitted a maximum wavelength around 470 nm, which would be optimal for the camphorquinone composite that most dentists use.

Dental curing devices

2018-02-01T21:46:24Z

Saxonday:

by Saxon Day
Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.

The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.

There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Dent1.jpg|800px]]

Figure 1.1: A dental curing device was shot at the Red Tide USB650 UV and the intensity of the light was recorded. The device emitted a maximum wavelength around 470 nm, which would be optimal for the camphorquinone composite that most dentists use.

Dental curing devices

2018-02-01T03:03:48Z

Saxonday:

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.

The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.

There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Dent1.jpg|800px]]

Figure 1.1: A dental curing device was shot at the Red Tide USB650 UV and the intensity of the light was recorded. The device emitted a maximum wavelength around 470 nm, which would be optimal for the camphorquinone composite that most dentists use.

File:Dent1.jpg

2018-02-01T02:59:46Z

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File:Dent1.jpg

2018-02-01T02:59:06Z

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File:Dent.jpg

2018-02-01T02:58:13Z

Saxonday: Saxonday uploaded a new version of File:Dent.jpg

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File:Dent.jpg

2018-02-01T02:57:31Z

Saxonday: Saxonday uploaded a new version of File:Dent.jpg

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Dental curing devices

2018-02-01T02:56:08Z

Saxonday:

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.
The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.
There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Dent.jpg|400px]]

Figure 1.1: A dental curing device was shot at the vernier and the intensity of the light was recorded.

File:Dent.jpg

2018-02-01T02:56:02Z

Saxonday: File uploaded with MsUpload

File uploaded with MsUpload

Dental curing devices

2018-02-01T02:38:40Z

Saxonday:

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.
The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.
There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Screen Shot 2018-01-31 at 8.37.27 PM.png|400px]]

Figure 1.1: A dental curing device was shot at the vernier and the intensity of the light was recorded.

File:Screen Shot 2018-01-31 at 8.37.27 PM.png

2018-02-01T02:38:15Z

Saxonday: File uploaded with MsUpload

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Dental curing devices

2018-02-01T02:37:05Z

Saxonday:

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.
The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.
There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

[[File:Screen Shot 2018-01-31 at 8.29.50 PM.png|400px]]
Figure 1.1: A dental curing device was shot at the vernier and the intensity of the light was recorded.

File:Screen Shot 2018-01-31 at 8.29.50 PM.png

2018-02-01T02:36:51Z

Saxonday: File uploaded with MsUpload

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Dental curing devices

2018-02-01T02:36:15Z

Saxonday:

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.
The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.
There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

Figure 1.1: A dental curing device was shot at the vernier and the intensity of the light was recorded.

Dental curing devices

2018-02-01T02:33:05Z

Saxonday: Created page with " Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past,..."

Dental curing devices are commonly used by dentists to polymerize resin-based materials. The advancement of these devices have greatly improved dentistry. In the past, dentists had to mix two materials together to create a self-solidifying resin that they would place on the tooth. The resin would solidify within 30-60 seconds causing dentists to have to rush to place the resin on the tooth and properly shape it. If the resin was not properly placed, the dentist would have to start all over again.
The spectrum of light emitted from these devices range from 380 nm to 500 nm. However, most restorative composites used by dentists today consist of a camphorquinone-amine complex initiator, which has a maximum wavelength of absorption of 470 nm. When light from dental cures is emitted, the camphorquinone complex initiator absorbs energy (heat) and reacts with the amine activator. This creates free radicals that then initiate polymerization.
There are four different dental curing lights that are used: tungsten halogen, light-emitting diode, plasma arc lights, and argon lasers. Tungsten halogen lights are most commonly used. In this light source, an electric current is passed through the tungsten causing it to heat to 2727 C. The tungsten releases visible and infrared radiation, which are absorbed by the composite. LED lights, on the other hand, have a much narrower emission spectrum than tungsten halogen lights. This narrower spectrum makes it difficult to cure many different types of composites.

Figure 1.1: A dental curing device was shot at the vernier and the intensity of the light was recorded.

Public Speaking Thermal Temperature

2017-09-07T19:04:18Z

Saxonday:

[[File:IMG_0294.jpg|400px]]

[[File:IMG_0285.jpg|400px]]

Public speaking is one of the most prominent phobias in our society. It cripples many individuals' ability to deliver coherent speeches or presentations. In order to discover the thermal changes that a person undergoes during public speaking, a student, who was about to present his senior research in front of the class, was examined with a thermal camera before and after his presentation. As can be seen by the pictures, the student's facial temperature before the presentation was around 89 F. However, after the presentation, the temperature rose around 4 degrees to 93 degrees F. Interestingly, the area near the nose was considerably colder (8 degrees F) after the presentation than before.

File:IMG 0285.jpg

2017-09-07T19:04:02Z

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Public Speaking Thermal Temperature

2017-09-07T19:03:05Z

Saxonday:

[[File:IMG_0294.jpg|400px]]

[[File:IMG_0294.jpg|400px]]

Public speaking is one of the most prominent phobias in our society. It cripples many individuals' ability to deliver coherent speeches or presentations. In order to discover the thermal changes that a person undergoes during public speaking, a student, who was about to present his senior research in front of the class, was examined with a thermal camera before and after his presentation. As can be seen by the pictures, the student's facial temperature before the presentation was around 89 F. However, after the presentation, the temperature rose around 4 degrees to 93 degrees F. Interestingly, the area near the nose was considerably colder (8 degrees F) after the presentation than before.

File:IMG 0285.jpg

2017-09-07T19:02:56Z

Saxonday: File uploaded with MsUpload

File uploaded with MsUpload

File:IMG 0294.jpg

2017-09-07T19:02:34Z

Saxonday: File uploaded with MsUpload

File uploaded with MsUpload

Public Speaking Thermal Temperature

2017-09-07T19:00:46Z

Saxonday: Created page with "Public speaking is one of the most prominent phobias in our society. It cripples many individuals' ability to deliver coherent speeches or presentations. In order to discover..."

Public speaking is one of the most prominent phobias in our society. It cripples many individuals' ability to deliver coherent speeches or presentations. In order to discover the thermal changes that a person undergoes during public speaking, a student, who was about to present his senior research in front of the class, was examined with a thermal camera before and after his presentation. As can be seen by the pictures, the student's facial temperature before the presentation was around 89 F. However, after the presentation, the temperature rose around 4 degrees to 93 degrees F. Interestingly, the area near the nose was considerably colder (8 degrees F) after the presentation than before.

William Ramsay

2017-08-28T00:54:06Z

Saxonday: Created page with "William Ramsay was a Scottish chemist born on October 2, 1852. He is best known for discovering the noble gases. In 1892, Ramsay, working with Lord Rayleigh, noticed that the..."

William Ramsay was a Scottish chemist born on October 2, 1852. He is best known for discovering the noble gases. In 1892, Ramsay, working with Lord Rayleigh, noticed that the nitrogen that was extracted from the air was denser than nitrogen released during different chemical reactions. He was able to identify this unknown gas that seemed to be mixed with nitrogen as being argon. While working to isolate argon from various minerals, he stumbled upon helium, which, at the time, was thought to only exist on the sun. From there, he was able to methodically discover the rest of the nobel gasses including xenon, neon, and krypton. For his work in discovering the nobel gasses, Ramsay was awarded the Nobel Prize in 1904.

http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1904/ramsay-bio.html

https://www.chemheritage.org/historical-profile/william-ramsay