Vieira Carolina Clasen, Zajkowski Luciéli Andréia, Prado Daniele Assumpção, de Almeida Gomes Fábio, Kopper Patrícia Maria Poli, Pilownic Katerine Jahnecke, Böttcher Daiana Elisabeth, Cenci Tatiana Pereira, Souza Erick Miranda, Pappen Fernanda Geraldo
Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil.
Graduate Program in Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil.
Aust Endod J. 2025 Aug;51(2):382-389. doi: 10.1111/aej.12952. Epub 2025 May 26.
This cross-sectional study evaluated technical failures in root canal treatments (RCTs) of curved molars (> 10°) performed by undergraduate students and their association with instrumentation techniques. Evaluations included filling extension, density, taper and ledge/zip formation. Bivariate analysis (chi-square, 5% significance) calculated odds ratios (OR) and 95% confidence intervals (CI). Among 188 RCTs, manual instrumentation had higher risks of ledge/zip formation, inadequate density, taper and underfilling, while reciprocating techniques showed more overfilling. Root curvature did not influence failure rates. The study showed 100% power for detecting underfilling, inadequate density and taper; 97.98% for overfilling and 71.11% for ledge/zip formation. Instrumentation technique significantly impacted failure frequency, with manual techniques associated with more complications.
这项横断面研究评估了本科学生对弯曲磨牙（>10°）进行根管治疗（RCT）时的技术失败情况及其与预备技术的关联。评估内容包括充填长度、密度、锥度以及台阶/根管壁穿孔的形成情况。双变量分析（卡方检验，显著性水平5%）计算了比值比（OR）和95%置信区间（CI）。在188例根管治疗中，手动预备出现台阶/根管壁穿孔形成、密度不足、锥度欠佳及欠填的风险更高，而往复式预备技术则表现出更多的超填情况。牙根弯曲度并未影响失败率。该研究显示检测欠填、密度不足和锥度欠佳的效能为100%；检测超填的效能为97.98%，检测台阶/根管壁穿孔形成的效能为71.11%。预备技术对失败频率有显著影响，手动技术与更多并发症相关。
