桩和根管重塑材料对薄壁牙体抗折性能的影响

发布时间：2018-07-21 10:26

【摘要】：目的:探讨如何选择合适直径的桩和根管重塑材料,使薄壁根管获得更好的抗折性能。方法 :选择90颗完整的上颌中切牙,完成根管治疗后,截冠分为9组。其中,4组进行常规桩道预备后行1.3 mm、1.6 mm镍铬合金铸造桩(A1.3和A1.6)和玻璃纤维桩(B1.3和B1.6)黏结后全冠修复,其余5组桩道扩大至根管壁为1 mm后行铸造桩核(C)和玻璃纤维桩修复,其中1.3、1.6 mm纤维桩用Rely X Unicem(D1.3和D1.6)和ParaCore(E1.3和E1.6)进行根管重塑和黏结,再用复合树脂堆核型后全冠修复,比较各组的抗折力和折裂模式。采用SPSS16.0软件包对数据进行统计学分析。结果:常规根管中,A1.3组获得最大的抗折力(610.2±45.6)N,A1.3、A1.6和B1.3、B1.6之间无显著差异(P0.05)。薄壁根管中,C组获得最大的抗折力(584.5±121.2)N,而纤维桩经ParaCore重塑根管后可以增加牙体的抗折力[E1.3为(420.6±95.7)N,E1.6为(517.9±67.2)N],分别较D1.3和D1.6有显著差异(P0.05),而与B1.3、B1.6无显著差异(P0.05)。纤维桩修复的折裂模式中大部分可以重新修复,而金属桩大部分为破坏性。结论:纤维桩修复后,折裂的牙体大部分可以再次修复,1.3 mm和1.6 mm直径的桩对于牙体的抗折性无显著影响,ParaCore重塑根管可有效增强牙体的抗折性能。
[Abstract]:Objective: to explore how to select the appropriate diameter of pile and root canal remodeling materials to obtain better flexural properties of thin-walled root canal. Methods: 90 complete maxillary central incisors were selected. After root canal therapy, crown amputation was divided into 9 groups. Four groups of them were repaired with full crown after preparation of conventional piles, 1.3 mm and 1.6 mm Ni-Cr alloy castings (A1.3 and A1.6) and fiberglass piles (B1.3 and B1.6). The remaining 5 groups of piles were repaired with cast pile core (C) and glass fiber post after the canal wall was 1 mm. The root canals were reconstructed and bonded with Rely X Unicem (D1.3 and D1.6) and Para Core (E1.3 and E1.6), and then repaired with the full crown after the karyotype of composite resin pile. The fracture resistance and fracture mode of each group were compared. SPSS 16.0 software package was used to analyze the data. Results: there was no significant difference between the two groups (610.2 卤45.60) and B1.3 (P 0.05). In the thin-walled root canal group, the maximum flexural strength was (584.5 卤121.2) N, but the flexural strength of the teeth was increased after reconstructing the root canal by Para Core [E1.3 was (420.6 卤95.7) Nu E 1.6 was (517.9 卤67.2) N], which was significantly higher than that of D1.3 and D1.6 (P0.05), but had no significant difference with B1.3 B1.6 (P0.05). Most of the fracture modes of fiber pile repair can be repaired again, while most of metal piles are destructive. Conclusion: most of the fractured teeth can be repaired again with 1.3 mm and 1.6 mm diameter post after the repair of fiber post.
【作者单位】：浙江省绍兴市上虞人民医院口腔科;
【分类号】：R783.1

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