定期的なデンタルクリーニングにより心血管リスクが低下する可能性がある（Abstract # 17704 and 10576）

専門家による歯のクリーニングにより心筋梗塞および脳卒中のリスクが軽減する可能性がある
Professional tooth scaling may reduce risk of myocardial infarction and stroke
専門家による歯のクリーニングは心筋梗塞（MI）および脳卒中の発症が少ないことと関連があるとの台湾のスタディが2011年American Heart Association学会で発表された。100,000人余りの中で、歯科医または歯科衛生士による歯石取りやクリーニングを受けていた者は、デンタルクリーニングを一度も受けたことがない者と比較し、MIリスクが24%低く脳卒中リスクが13%低かった。このスタディの対象者は、完全なまたは部分的な歯石取りを過去に一度でも受けたことのある成人51,000人余りおよび歯石とりの経験のない、性別および健康状態をマッチさせた同程度の数の人々であった。スタディ開始時にMIまたは脳卒中の既往を有する者はいなかった。専門家による歯石とりは心疾患や脳卒中の原因となる炎症を引き起こす細菌の増殖を軽減するようである、と筆者らは述べている。スウェーデンの別のスタディでは、歯周病の型により、心筋梗塞、うっ血性心不全および脳卒中のリスク上昇の程度が予測できた。例えば、歯が21本未満の人においてはMIリスクが69%高く、歯周ポケットが深い人においては53%高かった。
Full Text

Professional tooth scaling was associated with fewer myocardial infarctions (MI) and strokes in a study (Abstract 17704) from Taiwan presented at the American Heart Association's Scientific Sessions 2011.

Among more than 100,000 people, those who had their teeth scraped and cleaned (tooth scaling) by a dentist or dental hygienist had a 24 percent lower risk of MI and 13 percent lower risk of stroke compared to those who had never had a dental cleaning. The participants were followed for an average of seven years.

Scientists considered tooth scaling frequent if it occurred at least twice or more in two years; occasional tooth scaling was once or less in two years.

The study included more than 51,000 adults who had received at least one full or partial tooth scaling and a similar number of people matched with gender and health conditions who had no tooth scaling. None of the participants had a history of MI or stroke at the beginning of the study.

The study didn't adjust for heart attack and stroke risk factors - such as weight, smoking and race - that weren't included in the Taiwan National Health insurance database, the source of the information used in the analysis.

"Protection from heart disease and stroke was more pronounced in participants who got tooth scaling at least once a year," said Emily (Zu-Yin) Chen, M.D., cardiology fellow at the Veterans General Hospital in Taipei, Taiwan.

Professional tooth scaling appears to reduce inflammation-causing bacterial growth that can lead to heart disease or stroke, she said.

Hsin-Bang Leu M.D., is the study co-author.

In a separate study (abstract 10576), researchers found that the value of markers for gum disease predict myocardial infarction, congestive heart failure and stroke in different ways and to different degrees.

Anders Holmlund, D.D.S., Ph.D. Centre for Research and Development of the County Council of Gavleborg, Sweden, and senior consultant; Specialized Dentistry, studied 7,999 participants with periodontal disease and found people with:

Fewer than 21 teeth had a 69 percent increased risk of heart attack compared to those with the most teeth.

A higher number of deepened periodontal pockets had a 53 percent increased risk of heart attack compared to those with the fewest pockets.

The least amount of teeth had a 2.5 percent increased risk of congestive heart failure compared to those with the most teeth.

The highest incidence of gum bleeding had a 2.1 percent increased risk of stroke compared to those with the lowest incidence.