Penha Karla-Janilee-de Souza, Torres Carlos-Rocha-Gomes, Tavarez Rudys-Rodolfo-De Jesus, Firoozmand Leily-Macedo
DDS, MSc, PhD student, Department of Dentistry, Federal University of Maranhão (UFMA), São Luís, Maranhão, Brazil.
DDS, PhD, Professor, Department of Restorative Dentistry, Institute of Science and Technology of São José dos Campos (UNESP), São José dos Campos, SP, Brazil.
J Clin Exp Dent. 2020 Dec 1;12(12):e1124-e1130. doi: 10.4317/jced.57306. eCollection 2020 Dec.
To evaluate the influence of the association of the universal adhesive system to different energy densities of the Nd:YAG laser on the hydraulic conductance of dentin.
Fifty bovine dentin discs were made. The samples were stratified into four groups (n = 10) according to the treatment performed; SBU- Adper Single Bond Universal (3M ESPE), SBU_60 - SBU associated with the Nd:YAG laser (60mJ, 10Hz, 0.6W - 47.77 J / cm²), SBU_80 - SBU associated with the Nd:YAG laser (80mJ, 10Hz, 0.8 W - 63.69 J / cm2) and C - dentin without treatment (smear layer). Hydraulic conductance measurements were taken 24 hours after the treatments (HC1) and after erosive challenge (HC2). Scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX) helped to visualize the dentin after the different treatments. Scheffe and Games-Howell statistical tests were used to analyze hydraulic conductance (α = 0.05).
The treated dentin (SBU, SBU_60, and SBU_80) reduced HC1 when compared to dentin with smear layer (C) (< 0.001). The erosive challenge has increased HC2 in SBU_60 and C (< 0.001), and did not promote a significant difference in SBU_80 and SBU. The SEM / EDX analyzes showed an irregular and semi-permeable barrier on the surfaces of the treated dentin.
The association of universal adhesive with Nd:YAG can be an effective alternative for the occlusion of dentinal tubules, whereas higher energy per pulse Nd:YAG (SBU_80) can increase the resistance to permeability when exposed to the erosive challenge. Dentin, permeability of dentin, Nd:YAG Laser, adhesives.
评估通用粘结系统与不同能量密度的钕钇铝石榴石（Nd:YAG）激光联合使用对牙本质液流通导性的影响。
制作50个牛牙本质圆盘。根据所进行的处理将样本分为四组（n = 10）；SBU - Adper单组分通用粘结剂（3M ESPE），SBU_60 - SBU与Nd:YAG激光联合使用（60mJ，10Hz，0.6W - 47.77 J / cm²），SBU_80 - SBU与Nd:YAG激光联合使用（80mJ，10Hz，0.8W - 63.69 J / cm²）以及C - 未处理的牙本质（玷污层）。在处理后24小时（HC1）和酸蚀刺激后（HC2）进行液流通导性测量。扫描电子显微镜（SEM）和能量色散X射线光谱法（EDX）有助于观察不同处理后的牙本质。使用谢费检验和盖姆斯 - 豪厄尔统计检验分析液流通导性（α = 0.05）。
与有玷污层的牙本质（C）相比，经处理的牙本质（SBU、SBU_60和SBU_80）降低了HC1（< 0.001）。酸蚀刺激使SBU_60和C组的HC2增加（< 0.001），而在SBU_80和SBU组未产生显著差异。SEM / EDX分析显示经处理的牙本质表面有不规则且半透性的屏障。
通用粘结剂与Nd:YAG激光联合使用可能是封闭牙本质小管的有效替代方法，而较高每脉冲能量的Nd:YAG（SBU_80）在暴露于酸蚀刺激时可增加抗渗透性。牙本质，牙本质渗透性，Nd:YAG激光，粘结剂。
