Objective The present case–control study aimed to compare the psychological status of patients with and without halitosis, and investigate the association between psychological disorders and halitosis. Methods Patients who complained about bad breath and diagnosed with genuine halitosis were assigned to the halitosis group, while patients without genuine halitosis were assigned to the control group (n = 106, each group). Information on the demographics and Symptom Checklist‐90 (SCL‐90) of participants was collected. The organoleptic score and Halimeter measurement were used to measure halitosis. Results The mean SCL‐90 score of participants in the halitosis group (0.63) was significantly greater than that in the control group (0.48) (p = .002). The scores of the domains of interpersonal sensitivity, anxiety, depression, and paranoid ideation were found to be significantly different between the two groups (p < .05). However, there were no significant differences in SCL‐90 scores between the mild and moderate–severe halitosis groups (p = .479). Conclusion The psychological status of genuine halitosis patients was significantly worse than normal patients without halitosis complaint and also without halitosis. The main problems were in the aspects of interpersonal sensitivity, anxiety, depression, and paranoia. However, the negative impact was not related to the severity of halitosis.

Objectives To compare the prevalence of chronic periodontitis between men who had semen abnormalities and those who had normozoospermia through a case–control study. Materials and Methods Male patients who visited the assisted reproduction clinic of a large general hospital and were diagnosed with semen abnormalities were included in the case group. The control group was composed of patients of the same clinic with normozoospermia. The semen analysis included sperm concentration, count and progressive and total motility, which were measured in the laboratory. A questionnaire and clinical periodontal examination were conducted for all participants. Logistic regression was performed to explore the relationship between chronic periodontitis and male infertility. Results A total of 192 participants were included: 63 participants (32.8%) had some type of semen abnormality (case group), while 129 participants (67.2%) had normozoospermia (control group). The case group had a significantly higher prevalence of moderate/severe periodontitis than the control group (33.3% vs. 17.8%, p = .012). The logistic regression showed that participants who had moderate/severe periodontitis had a greater chance of having semen abnormalities after adjusting for other confounding factors (OR = 3.377, p = .005). Conclusions Periodontitis is associated with semen abnormalities and sperm motility in men.

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