TiO_2纳米管阵列负载盐酸米诺环素前后抗牙周致病菌性能的研究

目的:探讨二氧化钛(TiO_2)纳米管阵列负载盐酸米诺环素(MN)前后对牙龈卟啉单胞菌(Pg)、福塞坦氏菌(Tf)和伴放线放线杆菌(Aa)早期黏附行为的影响。方法:阳极氧化法制备TiO_2纳米管阵列并负载MN。微生物实验分成3组:单纯抛光钛片(Ti)组、TiO_2纳米管钛片(TiO_2)组和负载MN(120μg)TiO_2纳米管钛片(MN TiO_2)组;通过抑菌圈实验评估各组钛片的抗菌性能。结果:Ti组基本没有抗菌作用;TiO_2组的抗Aa、Pg及Tf活性较差,4 h后的抗菌率仅20%左右;负载MN后其抗菌性能增强,4 h后的抗菌率高达77%以上。结论:Ti组没有抗菌作用,若在其表面形成TiO_2纳米管阵列且负载MN则可形成较强的抗牙周致病菌作用。

Antibacterial activity of TiO2 nanotube arrays on periodontal pathogens before and after loaded with minocycline hydrochloride

AIM:To investigate the effects of titanium dioxide (TiO₂) nanotube arrays on the early adhesion behavior of Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf) and Actinobacillus actinomycetemcomitans (Aa) before and after loaded with minocycline hydrochloride (MN). METHODS:TiO₂ nanotube arrays were prepared by ano-dization and loaded with MN. Titanium slices were divided into 3 groups according to different treatment methods:pure polishing titanium (Ti) group, TiO₂ nanotube titanium (TiO₂) group, and MN (120 μg) TiO₂ nanotube titanium (MN TiO₂) group. The antibacterial properties of the titanium tablets were evaluated by the bacteriostasis test.RESULTS:The Ti had no antibacterial activity. The antibacterial activity of TiO₂ to Aa, Pg and Tf was poor, with only about 20% of antibacterial rate after 4 h. After loaded with MN, its antibacterial activity was enhanced, and the antibacterial rate was up to 77% after 4 h.CONCLUSION:No antibacterial activity in the Ti group was observed. If TiO₂ nanotube arrays were formed on the surface and MN was loaded, the antibacterial activity on periodontal pathogens was stronger.