随着人们对衰老的逐步认识，可注射填充物和体积增强剂已成为人们对抗衰老的重要治疗选择。聚左旋乳酸（Poly-L-lacticacid，PLLA）作为一种临床常用的医美填充材料，具有很好的皮肤外观改善效果，目前应用广泛。
Objective To investigate the efficacy of poly (L-lactic acid) application in the rejuvenation of hands, and to analyzethe safety of its application. Methods two subjects with aging problems of the hands were given subcutaneous injections of poly-L-lactic