[Surface characteristic of domestic poly-DL-lactic acid membrane for periodontal guided tissue regeneration].
OBJECTIVE
To evaluate the surface characteristic of domestic poly-DL-lactic acid membrane for periodontal guided tissue regeneration.


METHODS
Three guided tissue regeneration membranes (PDLLA, ePTFE, COL)were implanted in rats subcutaneously, then they were removed 2,4,8 weeks after surgery for examination under scanning electron microscope. The membranes in vitro served as control.


RESULTS
The surface of PDLLA membrane was characterized by unorganized smooth film structure. After 2 weeks implanted subcutaneously, its surface became rough with numerous oval micropores in it. These oval micropores were 5 microm in size.The micropores increased gradually in size and number 4, 8 weeks after implantation,there were many shindle shaped cells inlayed.


CONCLUSIONS
Domestic Poly-DL-lactic acid membrane exhibits excellent biocompatibility,which meets the criterion for GTR.
Yin
Y Z
YZ
Department of Oral Medicine, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
Shu
R
R
Liu
X F
XF
Liu
Z
Z