AIM This prospective clinical study evaluated the incidence of instrument fracture observed after single-file root canal treatment of molars using WaveOne Gold instruments. METHODOLOGY Three standardized, experienced and calibrated specialists treated 750 maxillary and mandibular molars with curvatures less than 45° (2691 root canals) over a 12-month period. All the treatments were performed in a single session. A total of 1104 WaveOne Gold instruments were used, including 38 small, 750 primary, 228 medium and 88 large instruments. Intracanal procedures were performed according to the manufacturer's recommendations, and each instrument was used in a single clinical case. The instruments were examined after their removal from the canal, under an operating microscope at 8× magnification. RESULTS No fractures were observed in any of the 1104 instruments used. CONCLUSIONS No fractures of WaveOne Gold reciprocating instruments occurred during root canal preparations performed in maxillary and mandibular molars with curvatures less than 45° when used strictly according to the manufacturer's recommendations and applied in a single clinical case.

中文翻译：

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WaveOne Gold文件的骨折发生率：一项前瞻性临床研究。

目的这项前瞻性临床研究评估了使用WaveOne Gold器械对磨牙进行单锉牙根管治疗后观察到的器械骨折的发生率。方法学在过去的12个月中，三名标准化，经验丰富且经过校准的专家对750例上颌和下颌磨牙的曲率小于45°（2691根管）进行了治疗。所有治疗均在一个疗程中进行。总共使用了1104台WaveOne Gold仪器，包括38台小型仪器，750台初级仪器，228台中型仪器和88台大型仪器。根据制造商的建议进行管内手术，每种器械均用于单个临床病例。将器械从根管中取出后，在8倍放大率的手术显微镜下进行检查。结果在使用的任何1104仪器中均未观察到骨折。结论严格按照制造商的建议使用并在单个临床病例中使用时，在上颌和下颌磨牙中曲率小于45°的根管准备过程中，没有发生WaveOne Gold往复器械的骨折。