Generali Luigi, Veneri Federica, Cavani Francesco, Checchi Vittorio, Bertoldi Carlo, Ingrosso Angela Lucia, La Rosa Giusy Rita Maria, Pedullà Eugenio
Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO), University of Modena and Reggio Emilia, 41124 Modena, Italy.
Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41124 Modena, Italy.
Dent J (Basel). 2024 Nov 26;12(12):384. doi: 10.3390/dj12120384.
: Apical extrusion of debris can affect the success of endodontic treatments, and the specific performance of certain retreatment systems has not been studied yet. Therefore, the aim of this in vitro study was to quantitatively assess the amount of apically extruded debris produced during retreatment procedures using three rotary NiTi retreatment systems in mature non-resorbed straight roots. : Thirty extracted permanent human teeth with single straight roots were selected. The root canals were prepared with the ProTaper Next system up to size 30 and obturated with gutta-percha and AH Plus sealer using the continuous wave of condensation technique. The samples were stored for 30 days and randomized by computer sequence into three retreatment groups (n = 10): (1) ProTaper Universal Retreatment; (2) HyFlex Remover; and (3) VDW.Rotate Retreatment. Apically extruded debris was collected in Eppendorf tubes and weighed with a microbalance (10 g) before and after retreatment procedure. As the data were not normally distributed, the Kruskal-Wallis test was applied for comparing data among groups, with an alpha level set at α = 0.05. Dunn's test was considered for post-hoc analyses, if appropriate. : Hyflex Remover was associated with the highest amount of extruded debris (0.85 ± 0.82 mg), followed by VDW.Rotate Retreatment (0.78 ± 0.41 mg) and ProTaper Universal Retreatment (0.62 ± 0.28 mg). However, the differences were not statistically significant ( > 0.05). : All the retreatment systems tested were associated with apical extrusion of debris in vitro, with no significant quantitative differences between them, suggesting that clinicians can choose a retreatment system with features appropriate to the specific clinical situation without risk of increasing the amount of apically extruded debris.
根尖部碎屑挤出会影响根管治疗的成功率，而某些再治疗系统的具体性能尚未得到研究。因此，本体外研究的目的是定量评估在成熟未吸收的直根管中使用三种旋转镍钛再治疗系统进行再治疗过程中根尖部挤出的碎屑量。：选取30颗拔除的单根恒牙。使用ProTaper Next系统将根管预备至30号，采用连续波热凝技术用牙胶尖和AH Plus封闭剂进行充填。将样本储存30天，然后通过计算机序列随机分为三个再治疗组（n = 10）：（1）ProTaper Universal再治疗系统；（2）HyFlex Remover；（3）VDW.Rotate再治疗系统。在再治疗前后，将根尖部挤出的碎屑收集到Eppendorf管中，并用微量天平（10 g）称重。由于数据不呈正态分布，采用Kruskal-Wallis检验比较组间数据，α水平设定为α = 0.05。如有必要，采用Dunn检验进行事后分析。：HyFlex Remover挤出的碎屑量最高（0.85±0.82 mg），其次是VDW.Rotate再治疗系统（0.78±0.41 mg）和ProTaper Universal再治疗系统（0.62±0.28 mg）。然而，差异无统计学意义（> 0.05）。：所有测试的再治疗系统在体外均与根尖部碎屑挤出有关，它们之间无显著的定量差异，这表明临床医生可以根据具体临床情况选择具有合适特性的再治疗系统，而不会增加根尖部挤出碎屑量的风险。
