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

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。

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） ram. Oonclusion 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.