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

Abstract

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

CLC Number:

R781.05

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.

Figures/Tables 5

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References 24

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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

Study on the effect of Er:YAG laser irrigation on the root canal system with different mechanical preparation tapers

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