钛合金与甲基丙烯酸脂义齿基托表面细菌粘附临床研究

Comparative Study of Bacteria Adhesion Between Surface of Titanium Alloy Base and Surface of Methyl Methacrylate Base

目的 :比较钛合金与甲基丙烯酸脂义齿基托表面细菌粘附的差异性 .方法 :选择上、下颌均有牙列缺损患者 10例 ,用钛合金与甲基丙烯酸树脂作基托材料分别制作义齿各一件 .戴义齿 6个月后 ,对义齿基托的组织面、磨光面进行细菌培养 ,计算出菌落数 (cfu/mL) ,比较分析其差异性 .结果 :甲基丙烯酸脂基托组织面、磨光面菌落数大于钛合金基托 ,两者具有统计学差异 (P <0 0 5 ) .而同种材料间义齿基托组织面、磨光面菌落数则无显著差异 (P >0 0 5 ) .菌种鉴定以变形链球菌、G -杆菌为主 ,其次为乳杆菌和葡萄球菌 .粘液放线菌和奈瑟氏菌较少 ,白色念珠菌未检出 .结论 :钛合金作为基托材料优于甲基丙烯酸脂 ,能减少细菌粘附 ,有益于口腔组织健康 .同种材料的义齿基托组织面。

Objective: To compare the difference of bacteriology between titanium alloy base and methyl methacrylate base. Methods: To select 10 patients of both maxillary and mandibular incomplete tooth rank, and to process dentures using titanium alloy base and methyl methacrylate for each patient respectively. After wearing denture for 6 months, to carry out bacteria culture of tissue surface and polish surface of denture base, and to count colony (cfu/mL), and to analyze the difference. Results: The number of colony on tissue surface and polish surface of methyl methacrylate base exceeds the number of colony on tissue surface and polish surface of titanium alloy base, and the significant difference was discovered between the two materials (P<0 05). However, the significant difference between the tissue surface and polish surface of the same material as base (P>0 05) was not discovered. The identification of bacteria types was as follows: the primary types were streptococcus mutans and G-bacilli, the secondary types were acidobacterium and staphylococci, the less types were antinomies viscous and neisseria, and candida albicans were not observed. Conclusion: Titanium alloy as base material is better than methyl methacrylate as base material; it may restrain bacteria adhesion, and is good for oral tissue health. The significant difference is not discovered between tissue surface and polish surface of the same material as denture base.