In this exploratory case-control study, somatic and psychological factors are used for exploring whether the anamnestic information gives support to the hypothesis of a relationship between therapy-resistant periodontitis and stress factors. From retrospective comparisons of pocket probing depth charts, we classified 22 patients as either non-responding or responding to periodontal treatment. The non-responding patient group, in comparison with the responding patient group, showed a profile over time of less pocket probing depth (PPD) reduction in response to periodontal treatment. Information registered in each patient's file regarding periodontal registrations and dental status was gathered, and an interview was conducted aiming at collecting information on dental experiences and attitudes. Bivariate and logistic multivariate regression analyses were performed. The NR-group patients experienced significantly more unpleasant feelings towards dental procedures and a higher tendency to experience pain in connection with dental procedures. This group was found to start smoking at an older age than the R-group. One reason for this may be that smoking debut at an older age is more related to stress conditions than debut at a younger age. The report highlights the possible contribution of stress factors in periodontal disease.
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