Efficiency of Er :YAG laser for dental hard tissue ablation and its effect on dental surface morphology

Xiuli WU; Shaohua YU; Lijun YE; Xiujie WEN; Luchuan LIU

doi:10.16016/j.1000-5404.201701087

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Efficiency of Er :YAG laser for dental hard tissue ablation and its effect on dental surface morphology

更新时间：2026-01-09

- Efficiency of Er :YAG laser for dental hard tissue ablation and its effect on dental surface morphology
- Journal of Third Military Medical University Vol. 39, Issue 16, Pages: 1654-1658(2017)
- 作者机构：
- 作者简介：
- 基金信息：
  
  the General Program of National Natural Science Foundation of China(81470032)
- DOI：10.16016/j.1000-5404.201701087
  CLC：
- Received：13 January 2017，
  
  Published：30 August 2017
- 稿件说明：
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Xiuli WU, Shaohua YU, Lijun YE, et al. Efficiency of Er :YAG laser for dental hard tissue ablation and its effect on dental surface morphology[J]. Journal of Third Military Medical University, 2017, 39(16): 1654-1658.
DOI：

Xiuli WU, Shaohua YU, Lijun YE, et al. Efficiency of Er :YAG laser for dental hard tissue ablation and its effect on dental surface morphology[J]. Journal of Third Military Medical University, 2017, 39(16): 1654-1658. DOI： 10.16016/j.1000-5404.201701087.

摘要

Abstract

Objective

To assess the efficiency of Er :YAG laser with different frequencies and irradiation time for ablation of dental hard tissues and its effect on dental surface morphology.

Methods

Eighty enamel samples and 80 dentin samples were randomly divided into 2 groups (

=40) with Er :YAG laser ablation for 10 s or 20 s

and each group was further divided into 5 subgroups (

=8) for ablation with Er :YAG laser at frequencies of 10

or 30 Hz. After irradiation

the diameter and depth of enamel and dentin pits were observed under stereoscopic microscope

and the surface morphology of the enamel and dentin was observed by scanning electron microscopy (SEM).

Results

The dia

meter and depth of enamel and dentin pits following Er :YAG laser ablation were increased significantly as the laser frequency increased within the range of 10-20 Hz and the ablation time extended (

0.05). The diameter and depth of the pits were increased only slightly as the laser frequency increased to 25 and 30 Hz and the ablation time increased to 20 s (

0.05). SEM showed alterations on the surface morphology of enamel and dentin after the ablation

and damages such as crack and melting occurred on the enamel and dentin surface after laser ablation at frequencies of 25 and 30 Hz.

Conclusion

Er :YAG laser with an appropriate frequency and ablation time is efficient for dental hard tissue ablation without causing thermal damage to the dental surface.

关键词

Keywords

references

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