Ahmed Doaa R M, Shaath Diana G, Alakeel Jomana B, Samran Abdulaziz A
Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
BDS, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia.
Biomed Res Int. 2021 Apr 30;2021:9984499. doi: 10.1155/2021/9984499. eCollection 2021.
Noncarious cervical lesions (NCCLs) are a common clinical finding often linked with dentin hypersensitivity (DH). . The aim of the study was to evaluate the influence of diode laser for the treatment of DH on microleakage of subsequent NCCL restorations. . Forty-eight extracted human premolars were collected. All teeth received standardized cervical preparation on both the buccal and palatal surfaces and were randomly divided into three groups ( = 16) according to the restorative material used: nanohybrid composite resin (CR), resin-modified glass ionomer (RMGI), and conventional glass ionomer (GIC). The prepared cavities on the palatal surfaces were treated by diode laser using SIROlaser Blue (Sirona Dental Systems, Bensheim, Germany) prior to restoration, while preparations on the buccal surfaces were directly restored. After thermocycling, the teeth were immersed in methylene blue dye for microleakage evaluation under 40x magnification at both occlusal and cervical margins. The Kruskal-Wallis test followed by the Bonferroni tests was conducted to determine inter- and intragroup differences ( < 0.05). . All restorative materials tested showed some degree of microleakage with no statistically significantly different scores with or without the use of laser desensitization prior to restorative treatment. Group CR showed the least microleakage, followed by group RMGI, while group GIC showed the highest. Cervical margins showed greater microleakage than the occlusal margins where the difference was statistically significant in the RMGI group without laser pretreatment ( = 0.006) and in both groups CR ( = 0.02) and RMGI ( = 0.006) with the laser pretreatment. . Application of diode laser for the treatment of DH prior to the restoration of teeth with NCCL did not affect the microleakage of all the restorative materials tested. All the materials showed some degree of microleakage, which was higher in gingival margins compared to occlusal margins. The resin composite shows the least microleakage among all the tested materials.
非龋性颈部病变（NCCLs）是一种常见的临床发现，常与牙本质过敏症（DH）相关。本研究的目的是评估二极管激光治疗DH对后续NCCL修复体微渗漏的影响。收集了48颗拔除的人类前磨牙。所有牙齿在颊面和腭面均进行标准化颈部预备，并根据所用修复材料随机分为三组（每组n = 16）：纳米混合复合树脂（CR）、树脂改性玻璃离子水门汀（RMGI）和传统玻璃离子水门汀（GIC）。在修复前，使用SIROlaser Blue（德国本斯海姆西诺德牙科系统公司）二极管激光对腭面制备的窝洞进行处理，而颊面的预备则直接进行修复。热循环后，将牙齿浸入亚甲蓝染料中，在40倍放大倍数下对咬合面和颈部边缘进行微渗漏评估。采用Kruskal-Wallis检验，随后进行Bonferroni检验以确定组间和组内差异（P < 0.05）。所有测试的修复材料均显示出一定程度的微渗漏，在修复治疗前使用或不使用激光脱敏的情况下，得分无统计学显著差异。CR组微渗漏最少，其次是RMGI组，而GIC组微渗漏最高。颈部边缘的微渗漏比咬合面边缘更大，在未进行激光预处理的RMGI组（P = 0.006）以及进行激光预处理的CR组（P = 0.02）和RMGI组（P = 0.006）中，这种差异具有统计学意义。在用NCCL修复牙齿之前，应用二极管激光治疗DH并不影响所有测试修复材料的微渗漏。所有材料均显示出一定程度的微渗漏，牙龈边缘的微渗漏高于咬合面边缘。在所有测试材料中，树脂复合材料的微渗漏最少。
