不同树脂材料对纤维树脂桩核修复微渗漏的影响
Effects of different resin core materials on microleakage for post-core restorations

摘要：目的 探究不同的树脂材料在桩核修复中对微渗漏程度的影响。方法 对46颗经过根管治疗的单根离体牙根，分别使用纤维桩加ParaCore双固化流动树脂、可乐丽菲露AP-X光固化复合树脂以及Ceramage聚合瓷行纤维树脂桩核修复，采用根管内直接成型-直接粘接或根管外间接成型-再粘接的方法，通过染色透明化法，观察不同纤维树脂桩核修复后的微渗漏情况。结果 ParaCore+根管内直接成型-直接粘接法制作的桩核微渗漏最严重[(4.94±1.71)mm]，ParaCore+间接成型-再粘接法[(0.91±0.33)mm]、AP-X+间接成型-再粘接法[(0.87±0.27)mm]、Ceramage+间接成型-再粘接法[(1.02±0.34)mm]微渗漏值较低。结论 不同树脂材料对纤维树脂桩核修复体的微渗漏情况无明显影响，但不同的制作及粘接方法对桩核修复体的微渗漏程度有显著影响。
ABSTRACT: Objective To compare the effects of different composite resins as core material on the degree of microleakage in post-core repairation. Methods A total of 46 recently extracted single-rooted mandibular premolars were distributed into different groups according to different core material including ParaCore, AP-X and Ceramage. Then we used direct or indirect forming method to make post-core restorations. All of the specimens were submerged in dyes. Then, they were demineralized, dehydrated and processed to be transparent. The extent of the dye leakage was examined under a stereomicroscope. Results The microleakage value was significantly higher in Group of direct-mold-cement with ParaCore (4.94±1.71)mm than in Group of indirect-mold-secondary-cement with ParaCore (0.91±0.33)mm, Group of indirect-mold-secondary-cement with AP-X (0.87±0.27)mm, and Group of indirect-mold-secondary-cement with Ceramage (1.02±0.34)mm. Conclusion Different methods of building and cementing FRC post-core restorations, but not different composite resins as core material, have significant effects on the extent of microleakage in post-core repair