本研究的目的是评价在牙周伤口愈合过程中,聚乳酸生物降解膜在结缔组织重建中的作用。材料和方法选用两只杂种狗,在静脉内麻醉后翻开口腔四个象限的第二、三和四前磨牙的颊侧粘骨膜瓣,将每个牙的一个根的牙槽骨凿去原来水平的25%,仔细去掉这些牙根的牙骨质,至线角区,已暴露的24个根面中的16个盖以覆膜,该膜的范围是从牙冠中份至降低了的牙槽嵴顶尖方1mm处,用Sco- The purpose of this study was to evaluate the role of PLA-biodegradable membranes in connective tissue remodeling during periodontal wound healing. Materials and Methods Two mongrel dogs were used to open the buccal mucoperiosteal flap of the second, third and fourth premolar molars in the four quadrants of the oral cavity after intravenous anesthesia. One root alveolar bone of each tooth was chiselled Horizontal 25%, carefully remove the cementum of these roots, to the linear angle zone, 16 of the 24 exposed root surfaces covered with a coating that ranges from a crown to a reduced tooth Groove ridge top square 1mm Department, with Sco-