Elsubeihi Emad, Haddadien Lina, Elsayed Mohamed
College of Dentistry, Ajman University, Ajman P.O. Box 346, UAE.
Center of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, UAE.
Int J Dent. 2025 Sep 11;2025:6635157. doi: 10.1155/ijod/6635157. eCollection 2025.
The objective of this study was to investigate the effect of different postspace preparation techniques on the apical seal of Resilon/RealSeal obturation system in root canals filled with the lateral condensation technique. A total of 92 maxillary central incisors were selected for this study, and their crowns were cut. The root canals were instrumented using a Reciproc file system and then filled with a Resilon/RealSeal obturation system, using the lateral condensation technique. Seventy-five samples were divided into five groups ( = 15) according to postspace preparation techniques: Group 1 (no postspace preparation), Group 2 (immediate/mechanical postspace preparation), Group 3 (immediate/thermal postspace preparation), Group 4 (delayed/mechanical postspace preparation), and Group 5 (delayed/thermal postspace preparation). The remaining 16 roots were allocated as follows: 10 roots were used as control groups, while seven roots were used for the preparation of blank solutions. The effectiveness of the apical seal of the obturation material was evaluated using the dye extraction method. The absorbance values of the extracted dye in different groups were measured using a spectrophotometer, and their concentrations (µg/mL) were calculated based on a preestablished calibration curve. Data were statistically analyzed for comparison among groups. All experimental groups showed significant differences in apical leakage ( < 0.05). The lowest mean dye leakage was observed in Group 1 (0.127 ± 0.041 µg/mL) and Group 3 (0.174 ± 0.076 µg/mL). However, no significant difference was found between these two groups ( > 0.05). Group 3 demonstrated significantly lower leakage compared to Groups 2, 4, and 5 ( < 0.05). The Resilon/RealSeal system used with the lateral condensation technique demonstrated a reduction in apical dye leakage but failed to completely prevent it, especially when postspace preparation was not performed. Among the evaluated techniques, immediate/thermal postspace preparation proved to be the most effective in maintaining the integrity of the apical seal. In contrast, delayed/thermal, delayed/mechanical, and immediate/mechanical techniques significantly compromised the apical seal. Selecting an optimal postspace preparation technique is essential to preserve the apical seal and enhance the long-term success of endodontic treatments.
本研究的目的是调查不同桩道预备技术对采用侧向加压技术充填根管的Resilon/RealSeal充填系统根尖封闭性的影响。本研究共选取92颗上颌中切牙，并截去其牙冠。使用Reciproc锉系统对根管进行预备，然后采用侧向加压技术用Resilon/RealSeal充填系统进行充填。75个样本根据桩道预备技术分为五组（每组 = 15）：第1组（不进行桩道预备），第2组（即刻/机械桩道预备），第3组（即刻/热桩道预备），第4组（延迟/机械桩道预备），第5组（延迟/热桩道预备）。其余16颗牙根分配如下：10颗牙根用作对照组，7颗牙根用于制备空白溶液。采用染料渗出法评估充填材料根尖封闭的有效性。使用分光光度计测量不同组中渗出染料的吸光度值，并根据预先建立的校准曲线计算其浓度（μg/mL）。对数据进行统计学分析以比较各组之间的差异。所有实验组在根尖微渗漏方面均显示出显著差异（P < 0.05）。在第1组（0.127 ± 0.041 μg/mL）和第3组（0.174 ± 0.076 μg/mL）中观察到最低的平均染料渗漏量。然而，这两组之间未发现显著差异（P > 0.05）。与第2组、第4组和第5组相比，第3组的渗漏显著更低（P < 0.05）。采用侧向加压技术的Resilon/RealSeal系统显示根尖染料渗漏减少，但未能完全防止，尤其是在未进行桩道预备时。在所评估的技术中，即刻/热桩道预备被证明在维持根尖封闭的完整性方面最有效。相比之下，延迟/热、延迟/机械和即刻/机械技术显著损害了根尖封闭。选择最佳的桩道预备技术对于保持根尖封闭和提高根管治疗的长期成功率至关重要。
