暴露于商用吹风机电磁场后汞合金修复体的微渗漏：一项研究

Microleakage of Amalgam Restorations after Exposure to Electromagnetic Fields of a Commercial Hair Dryer: An Study.

作者信息

Paknahad Maryam, Dehghani Ali, Khaleghi Iman, Eghildespour Mahsa, Mortazavi Ghazal, Mortazavi Seyed Mahammad Javad

机构信息

Oral and Dental Research Center, Oral and Maxillofacial Radiology Department, Dental Faculty, Shiraz University of Medical Sciences, Shiraz, Iran.

Department of Oral and Maxillofacial Pathology, Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.

出版信息

J Biomed Phys Eng. 2025 Jun 1;15(3):263-270. doi: 10.31661/jbpe.v0i0.2210-1551. eCollection 2025 Jun.

DOI:10.31661/jbpe.v0i0.2210-1551

PMID:40510311

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12153485/

Abstract

BACKGROUND

Dental amalgam is a popular restorative material used in posterior teeth. Hair dryers can emit electromagnetic fields (EMFs) that may affect the microleakage of the amalgam-tooth interface.

OBJECTIVE

The aim of this experimental study was to investigate whether the EMFs produced by commercial hair dryers could cause microleakage in amalgam restorations.

MATERIAL AND METHODS

In this experimental study, a total of 100 human extracted teeth without cavities were selected and prepared for class V preparations on their buccal aspects. The teeth were divided into five groups (G1-G5), each containing 20 teeth. Group 1 served as the control group and was not subjected to any treatment. Groups 2 to 5 were exposed to EMFs of a hair dryer (2000 W, 220 V, and 50 Hz). Groups 2 and 3 were exposed to "EMFs +Hot Air" for 20 min at 10 cm and 30 min at 5 cm, respectively. Groups 4 and 5 were exposed to "EMFs +Cool Air" for 20 min at 10 cm and 30 min at 5cm, respectively. After preparation, the sectioned teeth were evaluated for microleakage using dye penetration measurement.

RESULTS

The microleakage scores showed a significant difference among the three exposure groups (G2, G3, and G5) and the control group (=0.001, 0.002, and 0.01, respectively). However, there was no significant difference between G4 and G1. The microleakage score in G2 was higher than that in G4.

CONCLUSION

This study suggests that the common use of hair dryers can lead to damage in amalgam restorations.

摘要

背景

牙科汞合金是一种常用于后牙的修复材料。吹风机可发射可能影响汞合金与牙齿界面微渗漏的电磁场（EMF）。

目的

本实验研究旨在调查商用吹风机产生的电磁场是否会导致汞合金修复体出现微渗漏。

材料与方法

在本实验研究中，共选取100颗无龋的人离体牙，并在其颊面制备V类洞形。将牙齿分为五组（G1 - G5），每组20颗牙。第1组作为对照组，不进行任何处理。第2至5组暴露于吹风机的电磁场（2000W、220V和50Hz）。第2组和第3组分别在距离10cm处暴露于“电磁场 + 热风”20分钟，在距离5cm处暴露30分钟。第4组和第5组分别在距离10cm处暴露于“电磁场 + 冷风”20分钟，在距离5cm处暴露30分钟。制备完成后，使用染料渗透测量法评估切片牙齿的微渗漏情况。