Method for preventing and/or treating periodontal disease

A method for promoting dental root-periodontal tissue formation, comprising:

• administering to a subject in need thereof a pharmaceutical preparation having an active ingredient;
• wherein
• the active ingredient is selected from the group consisting of a compound shown in a following formula (I), a physiologically acceptable salt thereof, and a hydrate thereof;
• wherein
• in the formula (I), R1 and R2 are independently functional and are selected from the group consisting of a substituted or non-substituted linear alkyl group, a branched alkyl group, a linear alkenyl group, and a branched alkenyl group having a carbon number of 3 to 5, and wherein R′1 and R′2 are independently a hydrogen atom, a hydroxyl group, or an alkoxy group having a carbon number of 1 to 3.