Corneli Rosemary, Kolakemar Advith, Damda Aftab, Naik Rajaram
Department of Conservative Dentistry and Endodontics, AJ Institute of Dental Sciences, Mangalore, Karnataka, India.
J Conserv Dent. 2020 Jan-Feb;23(1):86-90. doi: 10.4103/JCD.JCD_94_20. Epub 2020 Oct 10.
The aim is to compare the effects of diode laser, GC tooth mousse, and sodium fluoride (NaF) varnish on dentinal hypersensitivity by scanning electron microscopic (SEM) evaluation.
Forty extracted human maxillary first premolar teeth were selected to prepare dentin disc of 2 mm thickness. The specimens were divided into four groups of 10 discs each-Group 1: Negative control, Group 2: Diode laser, Group 3: GC tooth mousse, and Group 4: NaF varnish. Diode laser and NaF was exposed on dentin disc for three consecutive days. GC tooth mousse was applied twice a day for 1 week. All the specimens were examined under SEM at a magnification of ×1500. The standardized SEM microphotographs were analyzed according to the scoring criteria.
Friedman test with Wilcoxon sign rank test for pair wise comparison at different time intervals within the group was computed using SPSS version 20. A < 0.05 was regarded as statistically significant.
The results showed that the use of diode laser was able to achieve complete occlusion of dentinal tubules followed by the use of GC tooth mousse and that of NaF varnish while control group showed completely open tubules.
Irradiation of dentinal tubules using diode laser could be effective for routine clinical treatment of dentinal hypersensitivity compared to NaF and GC tooth mousse.
通过扫描电子显微镜（SEM）评估，比较二极管激光、GC护齿泡沫和氟化钠（NaF） varnish对牙本质过敏的影响。
选取40颗拔除的人类上颌第一前磨牙制备2mm厚的牙本质盘。标本分为四组，每组10个牙本质盘——第1组：阴性对照，第2组：二极管激光，第3组：GC护齿泡沫，第4组：NaF varnish。二极管激光和NaF连续3天照射牙本质盘。GC护齿泡沫每天使用两次，共1周。所有标本在SEM下以×1500的放大倍数进行检查。根据评分标准对标准化的SEM显微照片进行分析。
使用SPSS 20版计算Friedman检验以及组内不同时间间隔的两两比较的Wilcoxon符号秩检验。P < 0.05被认为具有统计学意义。
结果表明，使用二极管激光能够使牙本质小管完全封闭，其次是使用GC护齿泡沫和NaF varnish，而对照组显示小管完全开放。
与NaF和GC护齿泡沫相比，使用二极管激光照射牙本质小管对牙本质过敏的常规临床治疗可能有效。
