Morphological study on the capability of Er:YAG laser irradiation for root canal preparation.
Morphological study on the capability of Er:YAG laser irradiation for root canal preparation.
复制标题
Er:YAG激光照射根管预备能力的形态学研究。
DOI：
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Koukichi Matsumoto
中科院分区：
文献类型：
--
作者：
Emi Matsuoka;K. Yonaga;J. Kinoshita;Y. Kimura;Koukichi Matsumoto
目的
本研究的目的是从形态学上评价Er：YAG激光照射根管预备的能力。
背景数据
Er：YAG激光根管预备的临床应用尚未见报道。
方法
将40颗离体牙随机分为两组，每组20颗。使用三种不同尺寸的光纤尖端以两种不同的参数（G 1，2 Hz和136-184 mJ/脉冲; G 2，2 Hz和170-230 mJ/脉冲）进行激光照射。激光照射后，将牙齿纵向一分为二，并通过体视和场发射扫描电子显微镜（FE-SEM）进行观察。记录各组根管预备所需时间，并按标准对根管预备完成程度进行评分。使用单因素方差分析（ANOVA）对时间进行统计分析。p < 0.01的值被认为具有显著性。
结果
在G1和G2中分别有50%和40%的牙齿使用激光照射进行根管准备。在G1中，30%的牙齿在激光照射后观察到残留的牙髓组织，但在G2中未被识别。FE-SEM显示，辐照区呈鳞片状且清洁，但粗糙且不规则。统计学分析表明，高能量下制备所需时间明显短于低能量下（p < 0.01）。
结论
结果表明，只要选择合适的参数，Er：YAG激光照射是能够进行根管预备的。
OBJECTIVE
The purpose of this study was to evaluate morphologically the capability of Er:YAG laser irradiation for root canal preparation in vitro.
BACKGROUND DATA
There have been no reports on root canal preparation using Er:YAG laser irradiation.
METHODS
Forty extracted human teeth were divided randomly into two groups of 20. Laser irradiation was performed using three different sizes of fiber tips at the two different parameters (G 1, 2 Hz and 136-184 mJ/pulse; G 2, 2 Hz and 170-230 mJ/pulse). After laser irradiation, the teeth were bisected longitudinally and observed by stereoscopy and field emission-scanning electron microscopy (FE-SEM). The time required for preparation in each group was recorded and the achievement degree of root canal preparation was scored according to our criteria. Statistical analysis of the times was performed using one-way analysis of variance (ANOVA). A value of p < 0.01 was considered significant.
RESULTS
Root canals were prepared using laser irradiation at 50% of teeth in G 1 and 40% in G 2. Remnant pulp tissue after laser irradiation was observed at 30% of teeth in G 1, but not recognized in G 2. Irradiated areas were scale-like and clean, but rough and irregular by FE-SEM. The statistical analysis revealed that the time required for preparation at high energies was significantly shorter compared with that at low energies (p < 0.01).
CONCLUSION
These results suggest that Er:YAG laser irradiation is capable of root canal preparation if appropriate parameters are selected.
影响因子：
4.6
作者：
PASHLEY, DH;MICHELICH, V;KEHL, T
通讯作者：
KEHL, T