[Clinical survey of the association between stress and periodontitis].

PURPOSE: To investigate the effects of stress on periodontitis. METHODS: 44 chronic periodontitis patients and 42 patients with healthy periodontal tissues(as control) were enrolled in the study. All subjects were required to complete a questionnaire which was mainly made up of the symptom checklist 90. Data collected included clinic parameters, psychological factors, life events and basic socio-demographics. The results were statistically assessed by SPSS 10.0 software. RESULTS: There was significant difference between periodontitis group and the control group in education, marital status, and life events (P<0.05 or P<0.01). Compared with the controls, the periodontitis patients got higher scores in somatization, obsessive-compulsive, interpersonal sensitivity, depression, anxiety, hostility, the impact of sleep and diet (P<0.05 or P<0.01). In periodontitis group, there was significant correlation between CPITN, CI and depression, anxiety, interpersonal sensitivity, etc. (P<0.01 or P<0.05). CONCLUSIONS: In this sample, there was a close association between stress and periodontitis. Stress may be a significant risk indicator for periodontitis.

[The effect of stress on periodontitis model of guinea pigs].

OBJECTIVE: To investigate the effect of stress on Guinea Pigs' periodontitis model. METHODS: 24 periodontitis models of guinea pigs were provided by inoculating Actinobacillus actinomycetemcomitans (Aa) and Porphyromonas gingivalis (Pg) in the gingival sulcus. The guinea pigs were divided into two groups: stress group(stimulated with cold bath and fright) and control group(without stimulations). Three animals of each group were sacrificed successively at 1, 2, 4, 6 week after inoculation. Clinical and histological evaluation, cortisol concentration examinations, osteoclast and osteoblast numbers account were applied. RESULTS: The cortisol concentration of stress group was significantly higher than that of control group at 1, 2, 4 week after stressed(P < 0.05 or P < 0.01). Pocket depth in stress group was significantly deeper than that in control group at 2, 4 week (P < 0.05), Compared with control group, the stress group demonstrated more active tissue damage and alveolar bone resorption. The bone repair in stress group was not as active as in control group. The osteoclast numbers in stress group was significantly higher than that in control group at 1, 4, 6 week (P < 0.05). CONCLUSIONS: Stress could enhance the destruction of periodontal tissues infected by pathogenic bacteria and increase disease susceptibility. It was concluded that stress was a significant risk indicator for periodontitis.

[Analysis of pathogenic relations between dental caries and periodontitis].

OBJECTIVE: In order to search the cause of dental caries and periodontitis. METHODS: Selected 70 patients with severe chronic periodontitis (CP group) and 50 patients with caries sensitivity (CS group) in clinical adults of oral medicine (18 to 50-year-old) during 1 year. Parameters of oral hygiene, caries and periodontitis were recorded in the typical groups of CP and CS. RESULTS: The patients of CP group had rare caries, DFS in the groups of CP and CS was 1.46+/-2.60 and 17.32+/-7.55 respectively(p<0.001),while the patients of CS group had relative periodontal health indeed, CPTNI in CS and CP groups were 0.98+/-0.63 and 3.24+/-0.62 respectively (p<0.001), and the number of missing teeth was 1.90+/-3.34 and 1.10+/-1.85 respectively(p>0.05). 3 patients(only 2.4%)confirmed the parameters of caries sensitive as well as severe periodontitis. CONCLUSION: The correlating pathogenesis of caries and periodontitis seems to have antiagonism tendency. The ecological connection and bacterial interaction are worthy of further study.