| abstract |
The present invention relates to a biodegradable sustained release preparation for treating periodontitis, especially containing polysaccharide. The core of the preparation according to the present invention consists of medicine and polysaccharide, i.e. sodium alignate, and is coated with cationic chitosan. By the function of chitosan building the coating of the preparation, the medicine is slowly released, and the carrier is completely decomposed by lysozyme in vivo after the release of the medicine. |