Influence of Er, Cr and Diode-980nm lasers on the microhardness of root dentin after cariogenic challenge.

Q2 Dentistry
Bruna Alves Castro de Menezes, Larissa Rocha Pacheco, Fernanda Rodrigues Borges Amaral Guarato, Gabriella Rodovalho Paiva, Juliana Jendiroba Faraoni, Regina Guenka Palma-Dibb, Maria Angélica Hueb de Menezes Oliveira, Denise Tornavoi de Castro, Vinícius Rangel Geraldo-Martins, Cesar Penazzo Lepri
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引用次数: 0

Abstract

Background: Root caries is an oral health condition characterized by the demineralization of the root surfaces of teeth. It is particularly common among elderly populations. Lasers have proven to be quite effective in treating root caries, with varying effects depending on the laser parameters and the target tissue. Thus, aim of this article was to evaluate the influence of Er,Cr laser irradiation and 980 nm diode laser application, with or without fluoride treatment, on the microhardness of root dentin.

Material and methods: Eigthy-bovine incisors were selected (4mm x 4mm x 3mm-thickness) and divided into 8 groups (n=10). NT: no treatment (negative control); FG: Fluoride gel (2%NaF); Er,Cr: Er,Cr: YSGG; Er,Cr+FG; FG+ Er,Cr; Di: 980 nm diode laser; Di+FG; FG+Di. The parameters Er,Cr:YSGG laser were as follows: 0.25 W; 5.0 Hz; 4.46 J/cm2 without water and 55% air. Furthermore, the 980-nm diode laser parameters were 2.0 W; 2.0 Hz; 21.41 J/cm2. Half of each specimen was isolated (control area) and the other half received one of the treatments proposed after to pH cycling during for 15 days to simulate a high caries risk environment, followed by longitudinal microhardness analysis (Knoop) under a load of 30 gf for 30 seconds. Microhardness percentage values were analyzed using the non-parametric Kruskal-Wallis test, followed by Dunn's post hoc test for pairwise comparisons.

Results: The highest percentage of microhardness loss was observed at 30 μm in FG (35.7%) and in CO (51.9%) (p< 0.05).

Conclusions: This study suggests that laser irradiation, with or without fluoride application, is associated with reduced microhardness loss in root dentin. Key words:Dentin, Fluoride, Hardness Tests, Laser, Root caries.

Er、Cr和二极管-980nm激光对牙本质诱发后牙根显微硬度的影响。
背景:牙根龋是一种以牙根表面脱矿为特征的口腔健康状况。这在老年人中尤为常见。激光已被证明在治疗牙根龋方面是相当有效的,根据激光参数和目标组织的不同,效果也有所不同。因此,本文的目的是评价铒、铬激光照射和980 nm二极管激光照射,加氟或不加氟处理对牙根本质显微硬度的影响。材料与方法:选取4mm × 4mm × 3mm厚度的牛切牙80颗,分为8组(n=10)。NT:未治疗(阴性对照);FG:氟凝胶(2%NaF);Er,Cr: Er,Cr: YSGG;呃,Cr +成品;FG +呃,Cr;Di: 980 nm二极管激光器;Di +成品;FG + Di。Er、Cr:YSGG激光器参数为:0.25 W;5.0赫兹;4.46 J/cm2,不含水和55%空气。980 nm二极管激光参数为2.0 W;2.0赫兹;21.41 J /平方厘米。每个样品的一半被隔离(对照区),另一半接受15天pH循环后提出的处理之一,以模拟高龋风险环境,然后在30 gf的负载下进行纵向显微硬度分析(Knoop) 30秒。显微硬度百分比值采用非参数Kruskal-Wallis检验进行分析,随后采用Dunn事后检验进行两两比较。结果:FG(35.7%)和CO(51.9%)在30 μm处的显微硬度损失比例最高(p< 0.05)。结论:本研究表明,激光照射,有或没有氟化物应用,与减少牙根的显微硬度损失有关。关键词:牙本质,氟化物,硬度试验,激光,牙根龋
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.70
自引率
0.00%
发文量
118
期刊介绍: Indexed in PUBMED, PubMed Central® (PMC) since 2012 and SCOPUSJournal of Clinical and Experimental Dentistry is an Open Access (free access on-line) - http://www.medicinaoral.com/odo/indice.htm. The aim of the Journal of Clinical and Experimental Dentistry is: - Periodontology - Community and Preventive Dentistry - Esthetic Dentistry - Biomaterials and Bioengineering in Dentistry - Operative Dentistry and Endodontics - Prosthetic Dentistry - Orthodontics - Oral Medicine and Pathology - Odontostomatology for the disabled or special patients - Oral Surgery
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