Pelozo Laís Lima, Tirapelli Camila, Mazzi-Chaves Jardel Francisco, Sousa-Neto Manoel Damião, Souza-Gabriel Aline Evangelista
Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Av. Café s/n, Ribeirão Preto , Ribeirão Preto, SP, 14040-904 , Brazil.
Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Clin Oral Investig. 2025 Sep 16;29(10):453. doi: 10.1007/s00784-025-06545-5.
Post-removal can be challenging and may increase the risk of iatrogenic damage during endodontic retreatment. This study evaluated the efficacy and efficiency of removing a novel fiber-colored post specifically designed to facilitate retrieval.
Twenty mandibular premolars were instrumented with an R50 file and irrigated using 2.5% NaOCl and 17% EDTA under ultrasonic agitation. The roots were filled with AH Plus, and post spaces were prepared. Micro-CT scans were performed before post-cementation and after post-removal. Specimens were divided into two groups: Control - Exacto post (Angelus) and Experimental - fiber-colored post (patent granted). Post-removal was performed under magnification with ultrasonic tips activated for 20-second intervals, with pauses for tip cooling, canal irrigation and drying. Outcomes included working time, dentin loss, residual material, canal deviation, and procedural quality. Data were analyzed using the T-test and Mann-Whitney at 5%.
The fiber-colored post showed a significantly shorter removal time (p = 0.023), with less dentin loss and residual material (p < 0.0001). The control group exhibited severe deviations from the root axis and a 30% perforation rate, whereas fiber-colored posts had no perforations and most samples without deviation (p < 0.0001).
The experimental fiber-colored posts enhanced removal efficiency, safety, and predictability.
Fiber-colored posts represent a promising restorative alternative that can facilitate post-removal during reintervention, helping to prevent iatrogenic damage and preserve tooth structure.
在根管再治疗过程中，桩取出可能具有挑战性，且可能增加医源性损伤的风险。本研究评估了一种专门设计用于便于取出的新型纤维着色桩的取出效果和效率。
选取20颗下颌前磨牙，用R50锉进行根管预备，并在超声震荡下使用2.5%次氯酸钠和17%乙二胺四乙酸进行冲洗。根管内充填AH Plus糊剂，并制备桩道。在桩粘结前和取出后进行显微CT扫描。样本分为两组：对照组——Exacto桩（安吉利斯公司）和实验组——纤维着色桩（已获专利）。在放大条件下取出桩，超声尖每隔20秒激活一次，期间暂停以冷却超声尖、冲洗根管并干燥。观察指标包括操作时间、牙本质损失、残留材料、根管偏移和操作质量。采用T检验和Mann-Whitney检验对数据进行5%水平的分析。
纤维着色桩的取出时间显著缩短（p = 0.023），牙本质损失和残留材料较少（p < 0.0001）。对照组出现严重的根管轴线偏移，穿孔率为30%，而纤维着色桩无穿孔，大多数样本无偏移（p < 0.0001）。
实验性纤维着色桩提高了取出效率、安全性和可预测性。
纤维着色桩是一种有前景的修复替代物，可在再次干预时便于取出桩，有助于防止医源性损伤并保留牙齿结构。
