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 13 December 2017

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News

Inverse association between poor oral health and IBD 

The most recent issue of the Clinical Gastroenterology & Hepatology investigates the inverse association between poor oral health and IBD.

News image

The hygiene hypothesis has been proposed as an explanation for the increasing incidence of inflammatory bowel disease (IBD). 

However, there are few data on the relationship between oral hygiene and development of IBD, and study results have been inconsistent. 

Dr Weiyao Yin and colleagues from Sweden investigated the association between poor oral health and risks of IBD, ulcerative colitis (UC), and Crohn’s disease (CD).

The researchers performed a population-based cohort study of 20,162 individuals followed for 40 years. 

Having dental plaques that covered more than 33% of tooth surface was negatively associated with CD
Clinical Gastroenterology & Hepatology
Residents of 2 municipalities of Uppsala County, Sweden, 15 years or older, were invited, and among them 20,333 were examined for tooth loss, dental plaques, and oral mucosal lesions at the time of study entry. 

Other exposure data were collected from questionnaires. 

Patients who later developed IBD (UC or CD) were identified by international classification codes from Swedish National Patient and Cause of Death Registers. 

From National Patient and Cause of Death Registers, the researchers identified 209 individuals who developed IBD, with an incidence rate of 37 per 100,000 person-years. 

The team found an inverse relationship between poor oral health and IBD, especially in individuals with severe oral problems. 

Loss of 5–6 teeth of the 6 teeth examined was associated with a lower risk of IBD.

The research team noted that having dental plaques that covered more than 33% of tooth surface was negatively associated with CD.

Dr Yin's team concludes, "In a population-based cohort study of more than 20,000 people in Sweden, we associated poor oral health with reduced risk of future IBD."

Clin Gastroenterol Hepatol 2017: 15(4): 525–531
24 April 2017

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