Al-Jeaidi Zaid
Zaid Al-Jeaidi Associate Professor, Conservative Dental Science Department, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.
Pak J Med Sci. 2020 Mar-Apr;36(3):526-531. doi: 10.12669/pjms.36.3.1819.
The aim was to assess the influence of Er, Cr: YSGG laser (ECL) and fractional carbon dioxide laser (FCL) on the shear bond strength (SBS) and microleakage of bioactive restorative material to dentin.
The study was performed in King Saud university in the month of June-July 2019. One hundred and twenty permanent teeth were vertically placed in acrylic resin. Based on the type of surface treatment regime (n=40), samples were divided into three groups. Group-I samples were surface conditioned with total etch and rinse (TE); Group-2 samples were surface treated with Er, Cr: YSGG laser (ECL) and Group-3 specimens were conditioned with fractional carbon dioxide laser (FCL). Surface treatment of dentin was followed by type of bulk fill resin (BFR) application. Tetric-N-Ceram was bonded to dentin conditioned with TE (n=20), FCL (n=20) and ECL (n=20). Similarly, bioactive material (BAM) was also bonded to conditioned surface (n=60). Samples (n=10) among each group were placed in a Universal testing machine. For microleakage testing 5 pairs of samples from each group (n=10) were placed in solution of 2% methylene blue for 24h Fracture analysis was performed using stereomicroscope at 40x magnification. Descriptive statistics i.e., means and standard for SBS and microleakage were compared using analysis of variance (ANOVA) and Tukey's post hoc test at a significance level of (p < 0.05).
The highest SBS scores were displayed by TE-BFR (Bulk filled resin) (19.21 ± 0.925 Mpa) and the lowest shear bond scores were presented by FCL-BFR (11.06±1.611 Mpa). The lowest microleakage scores were exhibited by group ECL-BFR (24.11±13.01nm). Similarly, the highest microleakage score was displayed in group FCL-BAM (42.18±16.32 nm). Admixed failure was pertinent in groups conditioned by ECL. Moreover, groups conditioned with FCL adhesive type of failure was found in abundance.
ECL has a potential to be used as an alternate to total etch and rinse for conditioning of dentin when bonded to bioactive materials.
评估铒铬：钇钪镓石榴石激光（ECL）和分次二氧化碳激光（FCL）对生物活性修复材料与牙本质之间的剪切粘结强度（SBS）和微渗漏的影响。
该研究于2019年6月至7月在沙特国王大学进行。将120颗恒牙垂直放置在丙烯酸树脂中。根据表面处理方式的类型（n = 40），将样本分为三组。第一组样本采用全酸蚀冲洗（TE）进行表面处理；第二组样本采用铒铬：钇钪镓石榴石激光（ECL）进行表面处理，第三组样本采用分次二氧化碳激光（FCL）进行表面处理。牙本质表面处理后，应用大块充填树脂（BFR）类型。将Tetric - N - Ceram粘结到经TE处理的牙本质上（n = 20）、FCL处理的牙本质上（n = 20）和ECL处理的牙本质上（n = 20）。同样，生物活性材料（BAM）也粘结到处理过的表面上（n = 60）。每组中10个样本置于万能试验机中。对于微渗漏测试，每组5对样本（n = 10）置于2%亚甲蓝溶液中24小时。使用40倍放大倍数的体视显微镜进行断裂分析。采用方差分析（ANOVA）和Tukey事后检验比较SBS和微渗漏的描述性统计数据，即均值和标准差，显著性水平为（p < 0.05）。
TE - BFR（大块充填树脂）显示出最高的SBS评分（19.21±0.925 Mpa），而FCL - BFR显示出最低的剪切粘结评分（11.06±1.611 Mpa）。ECL - BFR组表现出最低的微渗漏评分（24.11±13.01nm）。同样，FCL - BAM组显示出最高的微渗漏评分（42.18±16.32 nm）。ECL处理的组中混合性破坏较为显著。此外，FCL处理的组中发现大量粘结剂类型的破坏。
当与生物活性材料粘结时，ECL有潜力作为全酸蚀冲洗的替代方法用于牙本质处理。
