Daily Archives: June 28, 2013

“…CO2 content has had essentially nothing to do with earth’s near-surface air temperature throughout the entire Holocene,”

A new analysis finds that the Medieval Warming Period was global and unrelated to CO2.  Click here or image below.

report cover

Wind Turbine kills rarely seen White-throated Needletail

“There hasn’t been a sighting of a White-throated Needletail in the United  Kingdom for 22 years, so nearly 80 birdwatchers flocked to Scotland this week to  get a look, the Telegraph reported.  But instead of enjoying the world’s  fastest flying bird soaring, they watched it fly into the small blade of a wind  turbine and die.”

Click here for the complete story….

Who is responsible for children’s fluoride intake and dental health?

This study examined the effectiveness of fluoride salt administered to selected children in two public schools. The so called “public health” officials took the responsibility to conduct the study. I generally have no problem with this, except if the ultimate responsbility for children’s health is taken from parents. Of course, there are differing circumstances of children (e.g., children who are the responsibiity of a state) that must be taken into consideration. Perhaps failure in this case was the lack of parental attention given to the dental health of their childat home, rather than relying on the school officials.

Wennhall I, Hajem S, Ilros S, Ridell K, Ekstrand KR, Twetman S. Fluoridated salt for caries prevention and control – a 2-year field study in a disadvantaged community. Int J Paediatr Dent. 2013 Jun 20. doi: 10.1111/ipd.12045

BACKGROUND: Salt fluoridation is considered a cost-effective community strategy for reducing caries.

AIM: To evaluate the effect of school-based and domestic distribution of F-salt to school children residing in a disadvantaged community.

DESIGN: Seven hundred and thirty-three schoolchildren (12-14 years), attending two public schools, were enrolled; one was assigned to intervention (IS), whereas the other served as reference (RS). Subjects in IS were given access to F-salt (250 ppm F) in marked jars at school lunch and through free supply for domestic use. The 2-year caries increment and progression rate, assessed from bitewing radiographs, was scored. Information on diet, oral hygiene, and fluoride exposure was collected through a baseline questionnaire.

RESULTS: The dropout rate was high (IS 27%; RS 18%). At baseline, the IS children displayed more unfavourable risk factors and a higher caries experience than RS children. There were no significant differences in total caries increment or proximal progression rate between the two schools. A negative correlation (r = -0.29; P < 0.05) between the amount of delivered salt and the caries progression rate was, however, noted. No side effects were reported.

CONCLUSIONS: F-salt was not effective in this setting. Still, the findings indicate that salt may be a beneficial source of fluoride in schoolchildren provided that compliance can be secured.