The purpose of this study was to evaluate the effect of age on the ratio of pulp cavity/tooth width (P/T ratio) in healthy cats. The dental radiographs of 32 cats (16 males and 16 females) were generated with a digital dental X-ray unit with the animals under general anesthesia. Standardized measurement of the canine teeth was performed by drawing a line on the radiograph perpendicular to the cementoenamel junction (CEJ) of the tooth. There was an inversely proportional correlation between chronological age and the P/T ratio. Moreover, a strong Pearson squared correlation (gamma2 = 0.92) was identified by the curved regression model. No significant differences in the P/T ratio based on gender or breed were found. These results suggest that determination of age by P/T ratio could be clinically useful for estimating the chronological age of cats.
Age Determination by Teeth/*veterinary ; Animals ; Cats/*physiology ; Dental Pulp Cavity/anatomy & histology/*radiography ; Female ; Male ; Tooth/anatomy & histology/*radiography

Objectives: This study examined post-disaster mental health problems and related public perception of disaster-related mental health services. The differences of these perceptions according to the disaster experience and disaster type were also investigated. Methods: Data were collected via telephone and online surveys, and information from 2928 respondents was analyzed. The participants were allocated across age, sex, and residence area. Results: Those who had experienced disasters showed a more negative perception of post-disaster mental health services than those who had not. While natural disaster survivors most often reported financial problems as secondary stressors after a disaster, social disaster survivors were more likely to report mental health problems. Regarding national mental health support for disaster, disaster-experiencing respondents more often tended to prefer mental health services than non-disaster-experiencing respondents. Conclusion The current study can help understand the public perception of disaster-related mental health and the needs of mental health services. These findings could suggest directions and grounds for policies of a national support system for disaster-related mental health.