The Second Dental Center of Peking University School of Stomatology, No. 66 Anli Road, Chaoyang District, Beijing, 100101, China.
BMC Oral Health. 2021 Mar 23;21(1):150. doi: 10.1186/s12903-021-01512-4.
This randomized clinical trial aimed to compare the preparation time and severity of postoperative pain between HyFlex Electric Discharge Machine (EDM) glide path file (GPF) and PathFile.
Eighty patients whose molar teeth had at least one severely curved canal were treated by the same specialist. After access cavity preparation, the patients were randomly assigned to receive glide path enlargement with either HyFlex EDM GPF or PathFile. ProTaper Next X1 and X2 files were used to prepare the canals. The time of preparation was assessed and the severity of postoperative pain over the next 7 days was recorded. The preparation time and the postoperative pain scores were compared using the Linear Mixed Models (P ≤ 0.05).
Glide path enlargement time was significantly shorter with HyFlex EDM GPF (27.828 ± 2.345 s) than with PathFile (48.942 ± 2.864 s) (P < 0.001). The highest postoperative pain score was recorded on the first day and the pain decreased over time in both groups. HyFlex EDM GPF group patients reported significantly less postoperative pain than PathFile group patients overall (P < 0.001).
Postoperative pain and glide path preparation time could be reduced by using HyFlex EDM GPF system. Trial registration PKUSSNCT, PKUSSNCT-17B12, Registered 24 October 2017.
本随机临床试验旨在比较 HyFlex 电火花机（EDM）导丝通路锉（GPF）和 PathFile 预备时间和术后疼痛程度。
80 名至少有一颗磨牙有严重弯曲根管的患者由同一位专家进行治疗。在制备开髓口后，患者被随机分为使用 HyFlex EDM GPF 或 PathFile 进行导丝通路预备。使用 ProTaper Next X1 和 X2 锉预备根管。评估预备时间，并记录术后 7 天内的疼痛严重程度。使用线性混合模型（P≤0.05）比较预备时间和术后疼痛评分。
HyFlex EDM GPF 的导丝通路预备时间明显短于 PathFile（27.828±2.345s 比 48.942±2.864s）（P<0.001）。两组患者的术后疼痛评分均在第 1 天最高，随后疼痛逐渐减轻。HyFlex EDM GPF 组患者的总体术后疼痛评分明显低于 PathFile 组（P<0.001）。
使用 HyFlex EDM GPF 系统可以减少术后疼痛和导丝通路预备时间。试验注册号 PKUSSNCT，PKUSSNCT-17B12，于 2017 年 10 月 24 日注册。
