Sharafeddin Farahnaz, Torabi Parizi Arefeh, Jamshidi Maryam
Department of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Clin Exp Dent. 2025 May 1;17(5):e535-e541. doi: 10.4317/jced.62641. eCollection 2025 May.
The present investigation examined Er:YAG and Nd:YAG lasers efficiency in reducing microleakage when paired with two adhesive systems.
Class V cavities were created on the buccal and lingual sides of 30 extracted premolars. The samples were distributed into the following groups: 1) 37% phosphoric acid + Adper Single Bond 2; 2) Nd:YAG laser + Adper Single Bond 2; 3) Er:YAG laser + Adper Single Bond 2; 4) 37% phosphoric acid + Gluma Universal Bonding; 5) Nd:YAG laser + Gluma Universal Bonding; 6) Er:YAG laser + Gluma Universal Bonding. Each specimen was cured and restored with nanohybrid composite Z350. Dye penetration was used to assess microleakage and examined under a stereomicroscope. The findings were compared using Mann-Whitney, Wilcoxon Signed Ranks, and Kruskal-Wallis tests (α = 0.05).
The microleakage score in the occlusal margin was comparable between the groups. On the other hand, the microleakage in the gingival margin was significantly different between the groups (=0.004). The post-hoc comparison showed that the microleakage score for samples treated with Er: YAG was significantly lower than those treated with Nd: YAG (<0.05). The microleakage score in the gingival margin was significantly higher than that of the occlusal margin in all groups (<0.05), except for the Er: YAG + Single Bond 2 group (=0.15).
Except for Er:YAG + Single Bond 2, all groups showed more microleakage at the gingival margin compared to the occlusal margin. The Er:YAG laser outperformed the Nd:YAG laser at the gingival margin. Dental Adhesives, Dental Leakage, Er-YAG Laser, Nd-YAG Laser.
本研究考察了铒钇铝石榴石（Er:YAG）激光和掺钕钇铝石榴石（Nd:YAG）激光与两种粘结系统配合使用时减少微渗漏的效率。
在30颗拔除的前磨牙的颊侧和舌侧制备V类洞。样本分为以下几组：1）37%磷酸+Adper单键2；2）Nd:YAG激光+Adper单键2；3）Er:YAG激光+Adper单键2；4）37%磷酸+Gluma通用粘结剂；5）Nd:YAG激光+Gluma通用粘结剂；6）Er:YAG激光+Gluma通用粘结剂。每个标本用纳米混合复合材料Z350固化并修复。采用染料渗透法评估微渗漏，并在体视显微镜下检查。使用曼-惠特尼检验、威尔科克森符号秩检验和克鲁斯卡尔-沃利斯检验（α = 0.05）比较结果。
各组间咬合边缘的微渗漏评分相当。另一方面，各组间牙龈边缘的微渗漏有显著差异（=0.004）。事后比较显示，用Er:YAG治疗的样本的微渗漏评分显著低于用Nd:YAG治疗的样本（<0.05）。除Er:YAG +单键2组（=0.15）外，所有组牙龈边缘的微渗漏评分均显著高于咬合边缘（<0.05）。
除Er:YAG +单键2组外，所有组牙龈边缘的微渗漏均比咬合边缘更多。在牙龈边缘，Er:YAG激光的表现优于Nd:YAG激光。牙科粘结剂、牙齿渗漏、Er-YAG激光、Nd-YAG激光。
