Effect of apical size on apical pressure during syringe-needle and multisonic negative pressure irrigation
Effect of apical size on apical pressure during syringe-needle and multisonic negative pressure irrigation
复制标题
注射针头和多声波负压冲洗时根尖尺寸对根尖压力的影响
DOI：
10.1007/s10266-020-00586-w
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发表时间：
2021-01-05
期刊：
影响因子：
2.5
通讯作者：
Haapasalo, Markus
中科院分区：
文献类型：
--
作者：
Chen, Binwen;Shen, Ya;Haapasalo, Markus
根管冲洗过程中的根尖压力被认为是影响冲洗液挤出风险的关键因素。本研究的目的是通过正、负压力冲洗针和多声负压冲洗来检测根尖大小对根尖压力的影响。选择一个离体上颌第一磨牙，有两个单独的颊根，一个腭根和四个根管。将磨牙牙根固定在特制的根尖压力测量仪中，分别测量四个根管的根尖压力。受试的顶侧尺寸为10、30、40、50、60、70、80、90、110号。多超声负压冲洗方案是由制造商推荐的（45 mL/min），使用30-G侧排气针以5 mL/min的速度从工作长度3 mm处进行常规正压冲洗（SNI）和负压冲洗（NPSNI）。对于最小和最大心尖尺寸，也使用开放式30 G针头以10 mL/min的速度测量SNI心尖压。SNI法测得的心尖压保持正值，但使用抽吸时除外（NPSNI）。多声负压冲洗的根尖压力在所有情况下均保持为负。随着根尖直径的增加，SNI的根尖压力降低，而多声负压冲洗和NPSNI，它不受根尖直径的影响。与小根尖尺寸相比，大根尖尺寸不会导致更高的根尖压力值。
Apical pressure during root canal irrigation is regarded as a key factor affecting the risk of irrigant extrusion. The aim of this study was to examine the effect of apical size on the apical pressure by positive and negative pressure syringe-needle and multisonic negative pressure irrigation. An extracted maxillary first molar with two separate buccal roots, one palatal root and four canals was selected. The roots of the molar were fixed in a specially made apparatus to acquire the apical pressure of the four root canals separately. The apical sizes tested were from sizes 10, 30, 40, 50, 60, 70, 80, 90, 110. Multisonic negative pressure irrigation protocol was as recommended by the manufacturer (45 mL/min), syringe-needle irrigation was done using 30-G side-vented needle 3 mm from the working length at 5 mL/min as a conventional positive pressure irrigation (SNI), and as negative pressure irrigation (NPSNI) using suction. Apical pressure by SNI was measured also at 10 mL/min with an open-ended 30G needle, for the smallest and largest apical sizes. Apical pressures by SNI stayed positive, except when suction was used (NPSNI). The apical pressure by multisonic negative pressure irrigation remained negative in all situations. With increasing apical size, apical pressure by SNI decreased, whereas with multisonic negative pressure irrigation and NPSNI, it was not affected by apical size. Large apical size did not result in higher apical pressure values compared to small apical sizes.