Er:YAG激光激活荡洗对不同机械预备锥度根管系统的荡洗效果研究分析

doi:10.13591/j.cnki.kqyx.2023.08.001

摘要/Abstract

摘要：

目的研究不同机械预备锥度下,Er:YAG激光激活荡洗在根管内的荡洗效果。方法在不同预备锥度(15/.05、20/.06及25/.08)的树脂离体牙模型中进行Er:YAG激光荡洗模拟,高速摄像机拍摄每个激光脉冲的根管内气泡反应,计算根管内气泡的灰度积分。收集牙髓完好的离体第三磨牙,即刻进行不同锥度根管预备(13/.02、15/.05、20/.06及25/.08),分别采用Er:YAG激光激活荡洗及手用空针冲洗结合5.25% NaClO进行根管预备,完成后固定、脱钙、包埋、切片并进行HE染色,观察牙髓组织残留情况,进行统计分析。结果在相同单脉冲能量下,15/.05组根管中的气泡灰度积分少于20/.06及25/.08组,具有统计学差异(P<0.05);20/.06及25/.08组间未见显著差异(P>0.05)。病理学切片结果显示,相同条件下,Er:YAG激光荡洗组牙髓残留风险较手用空针冲洗组低(P<0.05)。Er:YAG激光荡洗组组内,与25/.08组相比,15/.05组牙髓残留风险较高(P<0.05)、20/.06组牙髓残留风险差异无统计学意义(P>0.05)。结论相同参数设置条件下,Er:YAG激光荡洗的效果在20/.06组与25/.08组的根管系统中差异无统计学意义,但均优于15/.05组。

关键词: Er:YAG激光, 根管治疗, 机械预备锥度, 微创预备

Abstract:

Objective To study the effect of Er:YAG laserirrigation on root canal system with different mechanical preparation tapers. Methods Er:YAG laser irrigation process was conducted in different prepared resin tooth models(15/. 05, 20/. 06 and 25/. 08). The bubble oscillation in root canal was recorded by a high speed camera and the gray scale integral of the bubbles was calculated. The third molars with vital pulp were collected and divided into three groups for different taper root canal preparation(13/. 02, 15/. 05, 20/. 06 and 25/. 08)after extraction. The root canals were prepared by Er:YAG laser irrigation, hand empty needle washing and 5.25% NaClO, respectively. The specimens were fixed, decalcified, embedded, sectioned and stained by HE. The residual pulp tissue was observed and analyzed statistically. Results Under the same mono-pulse energy, the gray scale integral of air bubbles in root canals of 15/. 05 group was significantly less than 20/. 06 and 25/. 08 group(P<0.05); there was no significant difference between 20/. 06 and 25/. 08 groups(P>0.05). The pathological results showed that the risk of residual pulp in Er:YAG laser group was lower than that of empty needle group under the same condition(P<0.05). Compared with 25/. 08 group, 15/. 05 group had a higher residual risk of residual pulp(P<0.05), but 20/. 06 group had no significant difference(P>0.05). Conclusion Under same parameters, the effect of Er:YAG laser on root canal system has no significant difference between 20/. 06 and 25/. 08 group, but both groups have better cleaningeffects than 15/. 05 group.

Key words: Er:YAG laser, root canal therapy, mechanical preparation taper, minimally invasive preparation

中图分类号:

R781.05

赵斯佳, 何新宇, 于悦, 薛晓伟, 潘翀, 赵继志. Er:YAG激光激活荡洗对不同机械预备锥度根管系统的荡洗效果研究分析[J]. 口腔医学, 2023, 43(8): 673-678.

ZHAO Sijia, HE Xinyu, YU Yue, XUE Xiaowei, PAN Chong, ZHAO Jizhi. Study on the effect of Er:YAG laser irrigation on the root canal system with different mechanical preparation tapers[J]. Stomatology, 2023, 43(8): 673-678.

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分组	激光组	冲洗组
空白对照组	16	16
阴性对照(13/.02)组	16	16
实验组1(15/.05)组	4	15
实验组2(20/.06)组	2	5
阳性对照(25/.08)组	1	2