Bağlar Serdar
Department of Restorative Dentistry, School of Dentistry, University of Kirikkale, Kirikkale, Turkey.
Lasers Med Sci. 2018 Jan;33(1):41-49. doi: 10.1007/s10103-017-2326-3. Epub 2017 Sep 17.
This study evaluated the caries resistant effects of sub-ablative Er,Cr:YSGG laser irradiation alone and combined with fluoride in comparison with fluoride application alone on enamel prepared for veneer restorations. And also, evaluated these treatments' effects on the shear bond strength of all-ceramic veneer restorations. One hundred and thirty-five human maxillary central teeth were assigned to groups of 1a-control, 1b-laser treated, 1c-fluoride treated, 1d-laser + fluoride treated for shear bond testing and to groups of 2a-positive control(non-demineralised), 2b-laser treated, 2c-fluoride treated, 2d-laser + fluoride treated, 2e-negative control (demineralised) for microhardness testing (n = 15, N = 135). Demineralisation solutions of microhardness measurements were used for the ICP-OES elemental analysis. The parameters for laser irradiation were as follows: power output, 0.25 W; total energy density, 62.5 J/cm and energy density per pulse, 4.48 J/cm with an irradiation time of 20 s and with no water cooling. Five percent NaF varnish was used as fluoride preparate. ANOVA and Tukey HSD tests were performed (α = 5%). Surface treatments showed no significant effects on shear bond strength values (p = 0.579). However, significant differences were found in microhardness measurements and in elemental analysis of Ca and P amounts (p < 0.01). Surface-treated groups showed significantly high VNH values and significantly low ICP-OES values when compared with non-treated (-control) group while there were no significance among surface-treated groups regarding VHN and ICP-OES values. Sub-ablative Er,Cr:YSGG treatment alone or combined with fluoride is as an effective method as at least fluoride alone for preventing the prepared enamel to demineralization with no negative effect on shear bond strength.
钇铝石榴石（Er,Cr:YSGG）激光单独照射以及与氟化物联合应用对为贴面修复制备的牙釉质的抗龋效果。并且，还评估了这些治疗方法对全瓷贴面修复体剪切粘结强度的影响。135颗人上颌中切牙被分为1a-对照组、1b-激光治疗组、1c-氟化物治疗组、1d-激光+氟化物治疗组用于剪切粘结测试，以及2a-阳性对照组（未脱矿）、2b-激光治疗组、2c-氟化物治疗组、2d-激光+氟化物治疗组、2e-阴性对照组（脱矿）用于显微硬度测试（n = 15，N = 135）。用于显微硬度测量的脱矿溶液用于电感耦合等离子体质谱（ICP-OES）元素分析。激光照射参数如下：输出功率0.25W；总能量密度62.5J/cm，每脉冲能量密度4.48J/cm，照射时间20s，且无水冷却。5%的氟化钠清漆用作氟制剂。进行了方差分析（ANOVA）和Tukey HSD检验（α = 5%）。表面处理对剪切粘结强度值无显著影响（p = 0.579）。然而，在显微硬度测量以及钙和磷含量的元素分析中发现了显著差异（p < 0.01）。与未处理（-对照）组相比，表面处理组显示出显著更高的维氏硬度（VNH）值和显著更低的ICP-OES值，而表面处理组之间在VHN和ICP-OES值方面无显著差异。单独的非消融性Er,Cr:YSGG治疗或与氟化物联合应用是一种与至少单独使用氟化物一样有效的方法，可防止制备的牙釉质脱矿，且对剪切粘结强度无负面影响。
