OBJECTIVE: To explore the biological clock of pulp sensibility in young people so as to enrich the theory of pulp-chronobiology and conduce to clinical diagnosis and the treatment of pulposis. METHODS: 40 healthy young volunteers (20 males and 20 females) were examined. Pulp sensibility test was performed using the pulp sensibility tester produced in France. Pulp sensibility reading was obtained at each 4 hours from 8:00 a.m. till next 8:00 a.m., thus there were totally seven time-pints in 24 hours. And the readings were averaged. RESULTS: The pulp sensibility data of every volunteer were analyzed by methods for cosinor-rhythmometry, and significant difference (P<0.05) was found. The acrophase and bathyphase appeared at 0:00 and 12:00 separately. We did not find significant difference of the mesor, amplitude and phase between young males and females (P> 0.05). CONCLUSION: Circadian rhythm is demonstrated in thepulp sensibility data of young people; the highest pulp sensibility is at 12:00 while the lowest is at 0:00.
OBJECTIVE: To explore the biological clock of pulp sensibility in young people so as to enrich the theory of pulp-chronobiology and conduce to clinical diagnosis and the treatment of pulposis. METHODS: 40 healthy young volunteers (20 males and 20 females) were examined. Pulp sensibility test was performed using the pulp sensibility tester produced in France. Pulp sensibility reading was obtained at each 4 hours from 8:00 a.m. till next 8:00 a.m., thus there were totally seven time-pints in 24 hours. And the readings were averaged. RESULTS: The pulp sensibility data of every volunteer were analyzed by methods for cosinor-rhythmometry, and significant difference (P<0.05) was found. The acrophase and bathyphase appeared at 0:00 and 12:00 separately. We did not find significant difference of the mesor, amplitude and phase between young males and females (P> 0.05). CONCLUSION: Circadian rhythm is demonstrated in thepulp sensibility data of young people; the highest pulp sensibility is at 12:00 while the lowest is at 0:00.