[A study of clinical effects of dentifrice including tranexamic acid (author's transl)].

In order to prevent the periodontal disease, it would be a matter of important fact to apply cleaning the teeth and giving massage on marginal gingiva by means of brushing and using dentifrices including effective ingredients.The aim of this study was to investigate on the effects of the dentifrice including tranexamic acid (T dentifrice) comparing with placebo (P dentifrice).Subjects were 242 students of Josai Dental University who had no serious oral disease.P-M-A index, redness, bleeding and dental plaque were selected as indices for clinical evaluation of periodontal disease. This study was conducted with double blind method.The results obtained were as follows:1) Subjects used for statistical analysis were 207 students. (104: T dentifrice group, 103: P dentifrice group).2) T dentifrice was significantly more superior in recovery of P-M-A index (p<0.01), redness (p<0.01) and bleeding (p<0.05). On the other hand, there was no significant difference in recovery of dental plaque between T dentifrice and P dentifrice.3) The mean reduction rates of T dentifrice and P dentifrice were 31.0% and 14.3% in P-M-A index, 36.3% and 19.6% in redness, 66.7% and 42.9% in bleeding, respectively.4) Significant difference was observed in the general improvement (p<0.01). The rates of the general improvement of T dentifrice and P dentifrice were 71.0% and 48.5%, respectively.5) No particular side effect was observed through this study.