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Poor oral hygiene linked to cancer deaths
Tuesday June 12, 2012 06:52:28 PM,
IANS
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London: Poor oral
hygiene seems to elevate the risk of death from cancer, because
too much of dental plaque has been linked to premature cancer
death by Swedish researchers.
An observational study examined 1,390 people between 1985 and
2009. At the beginning, participants were quizzed on factors
likely to increase their cancer risk and their mouth hygiene was
also assessed.
After 24 years, 58 patients had died, 35 as a result of cancer.
Those who died had a significantly higher amount of dental plaque
than survivors, researchers discovered, the journal BMJ Open
online reports.
The dental plaque index in those who had died was higher than
those who had survived. Dental plaque is made up of a film of
bacteria, which the teeth, including the gaps between the teeth
and gums, according to the Telegraph.
Those who died scored between 0.84 to 0.91 on the index -
indicating that the gum area of the teeth had been covered with
plaque - and the survivors had consistently lower scores of 0.66
to 0.67 - indicating only partial plaque coverage.
The average age of death was 61 for the women and 60 for the men.
The women would have been expected to live around 13 years longer,
and the men an additional 8.5 years, so their deaths could be
considered premature, say the authors.
The authors write: "Based on the present findings, the high
bacterial load on tooth surfaces and in gingival (gums) pockets
over a prolonged time may indeed play a role in carcinogenesis."
"Our study hypothesis was confirmed by the finding that poor
(mouth) hygiene, as reflected in the amount of dental plaque, was
associated with increased cancer mortality," they write.
"Further studies are required to determine whether there is any
causal element in the observed association," they concluded.
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