November 29, 2022

People who believe that luck or chance determine what happens to them are more likely to have severe gum disease compared with those who think their own actions are mainly responsible. That’s the finding of a French study presented at the recent EuroPerio10, the world’s leading congress in periodontology and implant dentistry organised by the European Federation of Periodontology (EFP).
This study examined the relationships between these beliefs, oral health, and socioeconomic and psychological factors. For the belief system, patients were categorised as having an external or internal locus of control. 
“Locus of control is the extent to which people believe that the outcomes of life events are due to their own actions (internal locus of control) or factors over which they have little influence (external locus of control),” said study author Dr Sebastien Jungo of the University of Paris, France.
The study enrolled 79 consecutive patients who attended a periodontal consultation at Bretonneau University Hospital, Paris. Data were collected on lifestyle and socioeconomic factors. Participants completed questionnaires to determine locus of control, stress level and depressed mood. The degree of plaque control and number of teeth were recorded. Patients were taught good oral hygiene habits including how to brush and floss their teeth.
During a second consultation an average of two weeks later, the following assessments were performed which indicate the severity of gum disease: 1) whether the gums bleed on probing; 2) pocket depth; 3) maximum attachment loss.
The average age of participants was 46 years and 66 per cent were women. Twenty participants had an external locus of control and 59 had an internal locus of control. The median depressed mood score was twice as high in the external locus group compared with the internal locus group.
Around three-quarters of the external locus group had a low education level compared with around half of the internal locus group. Regarding oral health, the average number of teeth lost was three in the external locus group and one in the internal locus group. The maximum attachment loss was significantly higher in the external versus internal locus group (9.95 mm versus 8.38 mm, respectively).
The researchers conducted multivariable analyses to examine the association between locus of control, oral health, and socioeconomic and psychological factors. 
External locus of control was significantly associated with depression score, education level, number of teeth and maximum attachment loss, with odds ratios of 1.21, 0.6, 0.67 and 1.31, respectively.
“Having an external locus of control was independently associated with more tooth loss and attachment loss, indicating greater severity of periodontitis,” Dr Jungo said.  
“In addition, these patients were more likely to be depressed and have a lower education level. The findings suggest that this group may need encouragement to consider periodontitis a manageable disease, particularly if they are feeling low.”



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