In vitro degradation and in vivo biocompatibility of poly(lactic acid) mesh for soft tissue reinforcement in vaginal surgery

被引:51
|
作者
de Tayrac, Renaud [1 ,2 ]
Chentouf, Sarnir [2 ]
Garreau, Henri [2 ]
Braud, Christian [2 ]
Guiraud, Isabelle [3 ]
Boudeville, Philippe [2 ]
Vert, Michel [2 ]
机构
[1] Caremeau Univ, Dept Obstet & Gynaecol, Nimes, France
[2] Univ Montpellier 1, CRBA, UMR 5473, Fac Pharm, Montpellier, France
[3] Montpellier Nimes Med Univ, Histol Embryol Cytogenet Lab, Nimes, France
关键词
poly(lactic acid); resorbable mesh; vaginal surgery; genital prolapse; degradation;
D O I
10.1002/jbm.b.30976
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
This study was aimed at evaluating the in vitro degradation, the in vivo biocompatibility and at comparing the effects of two methods of sterilization on poly(L-lactic acid) (PLA(94)) resorbable mesh. The mesh was manufactured to be used as surgical soft tissue reinforcement in the vaginal area. Samples of 100 mg of PLA(94) mesh (10 x 10 mm(2)) were immersed in isoosmolar 0.13M, pH 7.4 phosphate buffer solution at 37 degrees C, during 12 months. The hydrolytic degradation up to 12 months after immersion was monitored by measuring weight loss, mesh area changes, and by various analytical techniques namely Differential scanning calorimetry (DSC), capillary zone electrophoresis (CZE), size exclusion chromatography (SEC), and environmental scanning electron microscopy (ESENI). Specimens of nonsterilized, ethylene-oxide (ETO) sterilized, and gamma-ray sterilized PLA(94) mesh were compared. Fifteen samples were implanted in an incisional hernia Wistar rat model. Histopathology was performed up to 90 days after implantation to evaluate the inflammatory response and the collagen deposition. Although the decrease of molecular weight due to polymer chain scissions started 6 weeks after in vitro immersion, water-soluble degradation products and decrease of tensile strength appeared after 8 months only. Analyses showed also that ETO sterilization did not affect the degradation of the PLA(94) mesh. In contrast, gamma-ray sterilization increased very much the sensitivity of the mesh to the hydrolytic degradation. In vivo, the PLA(94) mesh exhibited good biocompatibility over the investigated time period. ((C) 2007 Wiley Periodicals, Inc.
引用
收藏
页码:529 / 536
页数:8
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