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二极管激光照射对银汞合金抗压强度的影响。

Effect of diode laser irradiation on compressive strength of dental amalgam.

作者信息

Tabari Mitra, Fekrazad Reza, Alaghemand Homayoun, Hamzeh Mahtab

机构信息

DDS, Pedodontist, Assistant Professor, Dental Research Center, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran.

DDS, Periodontics, Associate Professor, Department of Periodontology, Faculty of Dentistry, Laser Research Center in Medical Sciences, AJA University of Medical Sciences, Tehran, Iran.

出版信息

Electron Physician. 2017 Apr 25;9(4):4084-4089. doi: 10.19082/4084. eCollection 2017 Apr.

DOI:10.19082/4084
PMID:28607639
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5459276/
Abstract

INTRODUCTION

One of the biggest disadvantages of dental amalgam is that gaining its ultimate strength is a slow process. The use of a rapid-setting amalgam with high early compressive strength could be a better option in preventing early fractures in pediatric dentistry. The aim of this study was to determine the effect of diode laser irradiation on compressive strength of dental amalgam.

METHODS

A case-control study was performed on 180 amalgam samples made at the Tehran Dental Material Research Center in 2014. Fifteen and thirty minute compressive strength of regular setting and fast setting amalgams were measured as control. In case groups, the samples were irradiated by 810nm diode laser with power of 1 and 2 watt and in pulsed and continuous mode, and compressive strength was measured after 15 and 30 minutes. Statistical analysis was performed with SPSS 18 using one and two way ANOVA and Scheffe multiple comparisons test and p<0.05 was considered significant.

RESULTS

Numerous kinds of laser irradiation led to a significant increase in compressive strength compared to regular setting control groups. Fifteen minutes-compressive strength of regular-setting amalgam irradiated by 2 watt laser was significantly more than fast-setting control group (p<0.05).

CONCLUSION

Irradiation by 810nm diode laser can significantly increase the compressive strength of dental amalgam especially in the first 15 minutes.

摘要

引言

牙科汞合金最大的缺点之一是其达到最终强度的过程缓慢。使用具有高早期抗压强度的快速凝固汞合金可能是预防儿童牙科早期骨折的更好选择。本研究的目的是确定二极管激光照射对牙科汞合金抗压强度的影响。

方法

对2014年在德黑兰牙科材料研究中心制作的180个汞合金样本进行病例对照研究。测量常规凝固和快速凝固汞合金15分钟和30分钟时的抗压强度作为对照。在病例组中，样本分别用功率为1瓦和2瓦的810nm二极管激光以脉冲和连续模式照射，15分钟和30分钟后测量抗压强度。使用SPSS 18进行统计分析，采用单因素和双因素方差分析以及谢费多重比较检验，p<0.05被认为具有统计学意义。

结果

与常规凝固对照组相比，多种激光照射导致抗压强度显著增加。用2瓦激光照射的常规凝固汞合金15分钟时的抗压强度显著高于快速凝固对照组（p<0.05）。

结论

810nm二极管激光照射可显著提高牙科汞合金的抗压强度，尤其是在最初的15分钟内。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/2aed1df29a86/EPJ-09-4084-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/31a0582b74a2/EPJ-09-4084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/7c5999479292/EPJ-09-4084-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/2aed1df29a86/EPJ-09-4084-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/31a0582b74a2/EPJ-09-4084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/7c5999479292/EPJ-09-4084-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f87a/5459276/2aed1df29a86/EPJ-09-4084-g003.jpg

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本文引用的文献

1
Development of strength in dental silver amalgam.牙科银汞合金的强度发展。
Dent Mater. 2012 Oct;28(10):e207-17. doi: 10.1016/j.dental.2012.05.002. Epub 2012 Jun 5.
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Reduction of collateral thermal impact of diode laser irradiation on soft tissue due to modified application parameters.由于应用参数的改进，降低了二极管激光辐照对软组织的热附带影响。
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Surface and pulp chamber temperature rises during tooth bleaching using a diode laser: a study in vitro.使用二极管激光进行牙齿漂白期间的表面和髓腔温度升高：一项体外研究
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