Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Research Office, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Aust Endod J. 2023 Apr;49(1):38-47. doi: 10.1111/aej.12609. Epub 2022 Mar 7.
This study compared shaping ability between two single-file systems and before/after using supplementary file in untouched area, volume of removed dentin, maximum cut depth (the highest cut depth by main file) and remaining thinnest dentin (the thinnest root dentin after preparation). Ribbon-shaped distal canals of mandibular molars were prepared with non-adaptive core (WaveOne Gold) or adaptive core (XP-endo Shaper) files (n = 15/group) and additionally prepared with a supplementary file (XP-endo Finisher), and the shaping ability was investigated using micro-computed tomography. XP-endo Shaper group demonstrated significantly less overall untouched area than WaveOne Gold group (38.21 ± 6.98% vs. 47.68 ± 9.16%) (p < 0.05). No significant difference was detected between XP-endo Shaper and WaveOne Gold groups in volume of removed dentin (1.85 ± 0.53 vs. 1.66 ± 0.33 mm ), maximum cut depth (0.10-0.28 vs. 0.10-0.29 mm) and remaining thinnest dentin (0.66-0.80 vs. 0.78-0.88 mm). Supplementary XP-endo Finisher treatment significantly decreased untouched area (11%-23% reduction) (p < 0.05) with minimally cut root dentin (0.01-0.02 mm).
本研究比较了两种单锉系统在未处理区域前后使用补充锉后的成形能力、牙本质去除量、最大切割深度（主锉的最高切割深度）和剩余最薄牙本质（预备后最薄的根管牙本质）。使用非顺应性锉（WaveOne Gold）或顺应性锉（XP-endo Shaper）（每组 n=15）预备下颌磨牙的带状远中根管，并用补充锉（XP-endo Finisher）进行额外预备，并使用微计算机断层扫描研究成形能力。与 WaveOne Gold 组相比，XP-endo Shaper 组的总体未处理区域明显更小（38.21±6.98%比 47.68±9.16%）（p<0.05）。在牙本质去除量（1.85±0.53 比 1.66±0.33mm）、最大切割深度（0.10-0.28 比 0.10-0.29mm）和剩余最薄牙本质（0.66-0.80 比 0.78-0.88mm）方面，XP-endo Shaper 组和 WaveOne Gold 组之间没有差异。补充 XP-endo Finisher 处理可显著减小未处理区域（减少 11%-23%）（p<0.05），同时牙本质的切割量最小（0.01-0.02mm）。
