Gungor Ozge Erken, Kustarci Alper
J Clin Pediatr Dent. 2016;40(6):490-495. doi: 10.17796/1053-4628-40.6.490.
The aim of this study was to compare the effects of 2 NiTi file systems [Twisted File Adaptive (TFA) and Reciproc (RP)] and 2 irrigation techniques [Conventional needle irrigation (CNI) and Laser activated irrigation (LAI)] on the amount of apically extruded debris in primary maxillary molars.
Sixty extracted primary maxillary molars were randomly divided into 4 groups. The mesio-buccal roots of teeth in 4 groups were instrumented using TFA with LAI, RP with LAI, TFA with CNI and RP with CNI respectively. Debris extruded during instrumentation was collected into Eppendorf tubes and amounts were determined. The data were analyzed using two-way ANOVA test at 0.05 level of significance.
The results indicated all instrumentation and irrigation systems caused a measurable apical extrusion of debris. However, no statistically significant difference in debris extrusion was observed between irrigation techniques or instrumentation systems (P > 0.05). The total amount of debris extruded apically by LAI was greater than that by CNI.
All instrumentation and irrigation techniques caused debris extrusion. However, the optimal laser activation time and power settings should be investigated to ensure minimal extrusion of debris and irrigant due to cavitation and pressure during LAI in root canal treatment.
本研究旨在比较两种镍钛锉系统[Twisted File Adaptive（TFA）和Reciproc（RP）]以及两种冲洗技术[传统针头冲洗（CNI）和激光激活冲洗（LAI）]对上颌乳磨牙根尖部挤出碎屑量的影响。
将60颗拔除的上颌乳磨牙随机分为4组。4组牙齿的近中颊根分别采用TFA联合LAI、RP联合LAI、TFA联合CNI以及RP联合CNI进行预备。将预备过程中挤出的碎屑收集到Eppendorf管中并测定其数量。采用双向方差分析对数据进行分析，显著性水平为0.05。
结果表明，所有预备和冲洗系统均导致了可测量的根尖部碎屑挤出。然而，冲洗技术或预备系统之间在碎屑挤出方面未观察到统计学上的显著差异（P>0.05）。LAI根尖部挤出的碎屑总量大于CNI。
所有预备和冲洗技术均导致了碎屑挤出。然而，应研究最佳的激光激活时间和功率设置，以确保在根管治疗中LAI期间因空化和压力导致的碎屑和冲洗液挤出量最小。
