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第42卷第7期       王 萍,王先丽,吴 迪,等. 生物降解Mg增强PLA复合膜用于引导骨再生的抗菌性能研究[J].
                  2022年7月                     南京医科大学学报(自然科学版),2022,42(7):965-972                        ·971 ·


                抗生素治疗变得更加耐药,从而促进耐药细菌的发                           [7] ASHWIN B,ABINAYA B,PRASITH T P,et al. 3D⁃poly
                展 [30-31] 。本研究的结果表明,复合膜对细菌的抑制                         (lactic acid)scaffolds coated with gelatin and mucic acid
                作用随着 Mg 负载增加而升高,包括一定的杀菌效                               for bone tissue engineering[J]. Int J Biol Macromol,
                果和抑制细菌生长和繁殖的作用。                                        2020,162:523-532
                    本研究将 Mg/PLA 复合膜作为 GBR 膜对其力                   [8] DAVID H W,KAISER B W,WATSON J T,et al. Treat⁃
                                                                       ment of syndesmotic disruptions of the ankle with bioab⁃
                学性能进行了改良,并对其抗菌性进行了评价。本
                                                                       sorbable screw fixation[J]. J Bone Jo Surg Am Vol,2002,
                研究重点研究了 Mg 增强 PLA 的抗菌性能,然而仍
                                                                       84⁃A(1):26-31
                有一些局限性。首先,由于体内降解环境的复杂
                                                                 [9] LANGER R,BASU A,DOMB A J. Special issue:polylac⁃
                性,涉及酶促反应、炎症反应等,其降解特性与体外                                tide(PLA)based biopolymers[J]. Adv Drug Deliv Rev,
                不尽相同。除此之外,作为 GBR 屏障膜的替代生                               2016,107:1-2
                物材料,评估这种复合膜的成骨效果是下一步研究                           [10] LI G,ZHAO M H,XU F,et al. Synthesis and biological
                的重点。                                                   application of polylactic acid[J]. Mol Basel Switz,2020,
                    本研究将抗菌的金属 Mg 颗粒负载到生物惰性                             25(21):5023
                PLA 基体中,制备了具有抗菌性的功能复合膜。                          [11] MOHAMAD N,MAZLAN M M,TAWAKKAL I S M A,et
                20%wt Mg/PLA和40%wt Mg/PLA复合膜的表面粗糙                      al. Development of active agents filled polylactic acid
                度、抗菌性均显著高于PLA,其中,40%wt Mg/PLA的                         films for food packaging application[J]. Int J Biol Macro⁃
                                                                       mol,2020,163:1451-1457
                Mg 含量最高,抗菌性也优于其他复合膜组,但过量
                                                                 [12] NGUYEN V P,YOO J,LEE J Y,et al. Enhanced mechan⁃
                的Mg 添加降低了复合膜的力学性能。在24 h的降
                                                                       ical stability and biodegradability of Ti⁃infiltrated polylac⁃
                解实验中,复合膜组降解溶液的 pH 不同程度地升
                                                                       tide[J]. ACS Appl Mater Interfaces,2020,12(39):
                高,但均处于生理范围。综上所述,20%wt 的 Mg 负                           43501-43512
                载量为Mg/PLA复合材料作为GBR屏障膜使用提供                        [13] AGRAWAL C M,ATHANASIOU K A. Technique to con⁃
                参考。                                                    trol pH in vicinity of biodegrading PLA ⁃ PGA implants

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