| 摘要 |
<p>A ligature material comprises a base made of a biodegradable polymer covered by a layer of a copolymer of N-vinyl pyrrolidone with alkyl acrylate and/or alkyl methacrylate, containing an antimicrobial preparation or a preparation mix the biodegradation period of which is less than the biodegradation period of the base, whereas the thickness of said layer equals 0.1 to 1.0 of the thickness of the base.</p> |
