Department of Endodontics, Dental School, Universidade Tuiuti do Paraná, Curitiba, PR, Brazil.
Braz Oral Res. 2010 Jul-Sep;24(3):290-5. doi: 10.1590/s1806-83242010000300006.
The aim of this study was to evaluate the quality of filling in main and lateral root canals performed with the McSpadden technique, regarding the time spent on the procedure and the type of gutta-percha employed. Fifty simulated root canals, made with six lateral canals placed two apiece in the cervical, middle and apical thirds of the root, were divided into 5 groups. Group A: McSpadden technique with conventional gutta-percha, performed with sufficient time for canal filling; Group B: McSpadden technique with conventional gutta-percha, performed in twice the mean time used in Group A; Group C: McSpadden technique with TP gutta-percha, performed with sufficient time for canal filling; Group D: McSpadden technique with TP gutta-percha, performed in twice the mean time used in Group C; Group E: lateral condensation technique. Images of the filled root canals were taken using a stereomicroscope and analyzed using the Leica QWIN Pro software for filling material flow, gutta-percha filling extension and sealer flow. Data were analyzed by analysis of variance (ANOVA) and Tukey test (p < 0.05). The best values of penetration in lateral canals in the middle third occurred in the groups where TP gutta-percha was used. However, in the apical third, group B showed the best values. Although a longer time of compactor use allows greater penetration of the filling material into the lateral canals, the presence of voids resulted in bad quality radiographic images, suggesting porosity. The best quality of filling material was observed in Group A (McSpadden technique with conventional Gutta-Percha, performed with sufficient time for root canal filling).
本研究旨在评估 McSpadden 技术在主根管和侧根管中的充填质量，考察因素包括操作时间和使用的牙胶类型。将 50 个模拟根管，每根管有 2 个侧支根管，共 6 个，分别位于根管的颈、中、根尖三分之一处，分为 5 组。A 组：McSpadden 技术常规牙胶，操作时间足够；B 组：McSpadden 技术常规牙胶，操作时间为 A 组的两倍；C 组：McSpadden 技术热牙胶，操作时间足够；D 组：McSpadden 技术热牙胶，操作时间为 C 组的两倍；E 组：侧方加压技术。使用体视显微镜对充填后的根管进行拍照，使用 Leica QWIN Pro 软件分析充填材料的流动、牙胶的充填延伸和密封剂的流动。采用方差分析（ANOVA）和 Tukey 检验（p < 0.05）对数据进行分析。在根管中部的侧支根管中，使用热牙胶时，渗透值最佳。然而，在根尖部，B 组的效果最好。尽管牙胶锉使用时间延长会使更多的充填材料渗透到侧支根管中，但由于有空隙的存在，导致射线照相图像质量较差，提示存在多孔性。在 A 组（McSpadden 技术常规牙胶，操作时间足够）中观察到最好的充填材料质量。
