Akbari Mohammad Amin, Rezvani Mohammad Bagher, Mohammadibasir Mahshid, Karimi Mehrdad, Balalai Azadeh, Hamze Faeze, Hasheminejad Seyed Abbas
Private Practice, Tehran, Iran.
Dept. of Operative, Shahed Dental School, Shahed University, Tehran, Iran.
J Dent (Shiraz). 2023 Jun;24(2):206-212. doi: 10.30476/dentjods.2022.92780.1677.
Although sumac extract (SE) is reported as a collagen cross linker, the available data regarding its effect on the dentine micro-hardness is quite sparse.
Therefore, the aim of this study includes evaluating the effect of different concentrations of SE on dentine micro-hardness comparing to grape seed extract (GSE).
In this experimental study, the GSE was purchased from available market and convert to 5% solution. Meanwhile the 5, 10, and 20% of SE solutions were prepared experimentally. The base line micro-hardness of 60 samples (30 premolars divided to buccal and lingual segments) was recorded triplicate for each specimen and they were randomly divided into 5 groups (four abovementioned experimental solutions and de-ionized water as negative control). For 35 consecutive days, each sample was twice pH cycled and treated by solutions. Ultimately, the final micro-hardness was recorded triplicate again for each sample and the numerical data was compared with each other using one-way ANOVA and Tukey HSD Post Hoc tests (α=0.05).
The meanSD values of micro-hardness for the groups was recorded as 54.45 13.4, 65.6518.5, 39.572.26, 41.131.66 and 43.794.96 at base line and 10.40.99, 11.85 0.75, 10.161.84, 8.481.16 and 6.311.01 at final stage for control, GSE 5%, SE 5%, SE 10% and SE 20% respectively. There was no significant difference among the micro-hardness of the groups before treatment (= 0.369). However, after experimental treatment, there was significant difference between the groups (= 0.024) while in pairwise comparison just two groups (GSE 5% and SE 20%) had significant difference with each other (= 0.017).
The efficacy of SE was reversely related to its concentration. Moreover, neither GSE nor SE had significant effect on dentine micro-hardness after 35 day pH cycling.
尽管漆树提取物（SE）被报道为一种胶原蛋白交联剂，但关于其对牙本质显微硬度影响的现有数据相当稀少。
因此，本研究的目的包括评估不同浓度的SE与葡萄籽提取物（GSE）相比对牙本质显微硬度的影响。
在本实验研究中，GSE购自市场并配制成5%的溶液。同时，通过实验制备了5%、10%和20%的SE溶液。对60个样本（30颗前磨牙分为颊侧和舌侧部分）的基线显微硬度进行了三次记录，每个样本随机分为5组（上述四种实验溶液和去离子水作为阴性对照）。连续35天，每个样本进行两次pH循环并用溶液处理。最终，再次对每个样本的最终显微硬度进行三次记录，并使用单因素方差分析和Tukey HSD事后检验（α = 0.05）对数值数据进行相互比较。
对照组、GSE 5%组、SE 5%组、SE 10%组和SE 20%组在基线时的显微硬度平均标准差分别记录为54.45±13.4、65.65±18.5、39.57±2.26、41.13±1.66和43.79±4.96，在最终阶段分别为10.40±0.99、11.85±0.75、10.16±1.84、8.48±1.16和6.31±1.01。治疗前各组的显微硬度之间无显著差异（P = 0.369）。然而，实验治疗后，各组之间存在显著差异（P = 0.024），而在两两比较中，只有两组（GSE 5%和SE 20%）之间存在显著差异（P = 0.017）。
SE的疗效与其浓度呈负相关。此外，在35天的pH循环后，GSE和SE对牙本质显微硬度均无显著影响。
