An investigation into UV light exposure as an experimental model for artificial aging on tensile strength and force delivery of elastomeric chain

In this study, the effect of ultraviolet type A (UVA) on tensile properties of elastic chain was investigated. UVA light irradiation is used as a model for artificial aging and simulates long term storage of elastic chains

Tensile strength (n = 60) was measured after exposing Ormco, Forestdent and 3 M chains to UVA light for 0, 2, 3 and 4 weeks.

Force decay was measured using chains exposed on days 5, 10 and 14 (n = 60). The chains were then stretched at a fixed distance and the resulting force was measured at 0, 1, 24 h and 7, 14, 21 and 28 days. This test simulates the clinical situation of prestretching of elastic chains and subsequent shortening.

Tensile strength is statistically significant and is directly related to the duration of ultraviolet (UV) light irradiation. The Forestadent chain has the second highest value of the "as is" product, with the lowest degradation, showing the most consistent value over time. Ormco shows "receiving" and shows the lowest value after UV irradiation; 3M chain shows maximum tensile strength loss

The attenuation of power is also very different. Ultraviolet rays of more than 10 days seem to indicate "watershed" between products: 3 M occupies the majority of survivors, and the Forestat chain depends on when the chain stretches, but some survival I have a person. Ormco products can not survive under UV irradiation for more than 5 days

UVA exposure reduces force transmission and tensile strength of the exposure chain, so it can be used as a model for artificial aging.

As sunlight contains ultraviolet (UV) light, it can cause premature aging of the skin, wrinkles, cataracts, and skin cancer. The amount of damage caused by ultraviolet rays depends on light intensity, exposure time, and whether the skin is protected or not. No safe UV or safe sunscreen

In the current estimate, one in five Americans has the risk of developing skin cancer in their lifetime. Exposure to natural or artificial ultraviolet (UV) light directly affects the risk of people's skin cancer regardless of age or skin type. Most melanoma cases - the most deadly skin cancer - may be due to ultraviolet rays. We also know that the effects of exposure to ultraviolet rays, whether for sunbathing or indoor tanning beds, are cumulative. They have accumulated over the lifetime ...

Tensile strength is statistically significant and is directly related to the duration of ultraviolet (UV) light irradiation. The Forestadent chain has the second highest value of the "as is" product, with the lowest degradation, showing the most consistent value over time. Ormco shows the lowest value after "receiving" and UV exposure; 3M chain shows maximum tensile strength loss. The attenuation of power is also very different. Ultraviolet rays of more than 10 days seem to indicate "watershed" between products: 3 M occupies the majority of survivors, and the Forestat chain depends on when the chain stretches, but some survival I have a person. Ormco products can not survive under UV irradiation for more than 5 days

Study of ultraviolet radiation as an experimental model of artificial aging for tensile strength and force transfer of elastic chain

It is estimated that up to 90% of melanomas are due to ultraviolet (UV) exposure. This includes ultraviolet exposure from the sun and from artificial light sources such as tanning beds. The International Agency for Research on Cancer (IARC) at the World Health Organization classifies sunburn and sunburn lamps as the most dangerous category of cancer. This is the same category as harmful substances such as thorium and certain kinds of radium. The tanning industry is trying to tell consumers that vitamin D is needed and should be found in tanning beds. However, most tanning bulbs actually produce UVA radiation and the body needs UVB radiation to produce vitamin D. In fact, all essential vitamin D is contained in a healthy diet or vitamin supplement. If you are concerned about vitamin D levels, please listen to your doctor instead of a tan salon!