| 摘要 |
It is intended to provide a periodontal ligament-protecting agent which prevents failures in the periodontal tissue (in particular, periodontal ligament) caused by Porphyromonas gingivalis, and an oral preparation, a food or a drink having effects of preventing and treating diseases relating to damage in periodontal ligament which contains this periodontal ligament-protecting agent. Namely, a periodontal ligament-protecting agent which is a proanthocyanidine having an effect of relieving toxicity of Porphyromonas gingivalis to periodontal ligament (preferably a proanthocyanidine originating in immature apple fruit or hop bract); and an oral preparation, a food or a drink containing this periodontal ligament-protecting agent as the active ingredient. |
