Cataracts: Can my dentist's light cause cataracts
Tuesday 22 April 2008
"My dentist uses a mauve-coloured light to set white fillings. Can these lights cause cataracts if they are used on the top front teeth near to the eyes?"
Dr Fred Kavalier answers your health question:
Traditional fillings for tooth decay were made of amalgam, which is a mixture of metals such as mercury and silver. More modern white fillings are known as composite fillings. They are made from a combination of a polymer and glass. The white material is a soft paste when it is put into a tooth. The dentist then shines a blue or ultraviolet light on the paste, which sets off a chemical reaction that turns it into a strong, solid substance. Cataracts are more likely to form in the eyes of people who have been exposed to strong sunlight (which contains ultraviolet light) over many years. The blue or ultraviolet light which the dentist uses to set white fillings is a narrow beam that is directed at the filling for a short period of time (less than a minute). The amount of ultraviolet light is small and the length of exposure is short. In the unlikely event that a small amount of light managed to shine on your eyes, the risks would be insignificant. Dentists, who are using these lights every day, are advised to protect their eyes from excessive exposure.
Sales of the tablet are set to fall again, say analysts
Met Police confirm there was a 'minor disturbance' and that no-one was arrested
George Lucas criticises the major Hollywood film studios
Does Chris Grayling realise what a vague concept he is dealing with?
Trend which requires crisps, a fork and a strong stomach is sweeping Mexico's streets
Parties threaten resort's image as a family destination
I Am Bread could actually be a challenging and nuanced title
Life & Style blogs
iPhone 6 'catches on fire and burns man's leg after bending in pocket'
Are you ready for Crazy Doritos, the red-hot snack food craze sweeping Mexico’s streets?
Drink alcohol and eat meat to improve male fertility - but cut down on coffee, studies suggest
The inventor of the Facebook 'like' button says he never made a 'dislike' button because he feared the 'unfortunate consequences'
Lynda Bellingham death: What is bowel cancer and what are the symptoms?
- 1 Jack the Ripper: Scientist who claims to have identified notorious killer has 'made serious DNA error'
- 2 Banksy arrest hoax: Internet duped by fake report claiming that the street artist's identity has been revealed
- 3 Are you ready for Crazy Doritos, the red-hot snack food craze sweeping Mexico’s streets?
- 4 Drink alcohol and eat meat to improve male fertility - but cut down on coffee, studies suggest
- 5 Brian Harvey turns up at Downing Street and 'demands to speak to Prime Minister'
£80 - £140 per day: Randstad Education Leeds: Year 5 Teacher KS2 teaching job...
£35000 - £45000 Per Annum Pensions Scheme After 6 Months: Clearwater People So...
£35000 - £37000 per annum + Benefits: Ashdown Group: Systems Analyst / Busines...
£30000 - £35000 per annum + Benefits: Ampersand Consulting LLP: Senior Change ...