Quality of Obturation Achieved by a Non-gutta-percha-based Root Filling System in Single-rooted Canals
Quality of Obturation Achieved by a Non-gutta-percha-based Root Filling System in Single-rooted Canals
复制标题
DOI：
10.1016/j.joen.2014.07.032
复制
发表时间：
2014-12-01
影响因子：
4.2
通讯作者：
Tay, Franklin R.
中科院分区：
文献类型：
--
作者：
Selem, Lisa C.;Li, Guo-hua;Tay, Franklin R.
前言：本研究考察了一种实验性非牙胶根管充填系统(NGP)的根管充填质量，该充填系统采用热的垂直或冷侧向加压。通过比较用牙胶和使用相同充填技术的环氧树脂封闭剂填充的类似根管的间隙和空洞的体积百分比来评估充填质量。方法：对40颗单根椭圆形根管的前磨牙进行4种材料/充填技术组合(n=10)的清洁、成形和充填。用微型计算机断层成像扫描充填的根管。分析重建图像在3个水平(距工作长度0-4、4-8和8-12 mm)的间隙和空洞的体积百分比。分别在4 mm、8‘mm和12 mm水平切开牙根。扫描电子显微镜检查根管切面阴性复制件的扫描电子显微镜图像，以量化界面间隙的周向百分比和根管内空洞的面积百分比。数据采用参数或非参数统计方法进行分析。结果：“封闭术”与“材料”相比，缝隙和空洞的体积百分比分布差异有统计学意义。在使用冷侧压的NGP系统充填的根管中，发现明显更高的间隙和空洞的百分比。对阴性复制品的检查将这种差异归因于更高的界面间隙面积百分比，而不是更多的根管内空洞。结论：NGP系统采用温热垂直密闭法，可达到根管空间三维充填的目的，其效果与牙胶和根管封闭剂相当。
Introduction: The present study examined the quality of obturation in root canals filled by an experimental non gutta-percha based (NGP) root filling system using warm vertical or cold lateral compaction. The quality of obturation was evaluated by comparing the volumetric percentage of gaps and voids identified from similar canals obturated with gutta-percha and an epoxy resin based sealer using the same obturation techniques. Methods: Forty single-rooted premolars with ovalshaped canals were cleaned, shaped, and obturated with 1 of the 4 material/obturation technique combinations (n = 10). Filled canals were scanned with micro computed tomographic imaging. Reconstructed images were analyzed for the volumetric percentage of gaps and voids at 3 canal levels (0-4, 4-8, and 8-12 mm from the working length). Roots were sectioned at the 4-mm, 8'-mm, and 12-mm levels. Scanning electron microscopic images of negative replicas of root sections were examined to quantify the circumferential percentage of interfacial gaps and the area percentage of intracanal voids. Data were analyzed with parametric or nonparametric statistical methods. Results: A statistically significant difference was found for the volumetric percentage distribution of gaps and voids for "obturaton technique" but not for "material." Significantly higher percentages of gaps and voids were identified in canals obturated with the NGP system using cold lateral compaction. Examination of negative replicas ascribed this difference to a higher area percentage of interfacial gaps rather than more intracanal voids. Conclusions: Using warm vertical compaction, the NGP system fulfils the objective of 3-dimensional obturation of the canal space in a manner comparable with the results achieved with gutta-percha and a root canal sealer.