Khedmat Sedigheh, Hashemi Alaleh, Dibaji Fatemeh, Kharrazifard Mohammad Javad
Dental Research Center, Dentistry Research Institute, Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, and Iranian Center for Endodontic Research, Tehran, Iran.
Undergraduate student, School of Dentistry, International Campus of Tehran University of Medical Sciences. Tehran, Iran.
J Dent (Tehran). 2015 Jan;12(1):25-30.
This study aimed to assess the effect of chloroform, eucalyptol and orange oil solvents on the microhardness of human root dentin.
Sixty-eight single-rooted single-canal extracted human premolar teeth were used. Tooth crowns were separated from the roots at the cementoenamel junction (CEJ). Roots were buccolingually sectioned into mesial and distal halves. Specimens were randomly divided into 5 groups, with 20 teeth in each solvent group and 4 teeth in each control group. Primary microhardness of specimens was measured using Vickers microhardness tester. Specimens were exposed to solvents for 15 minutes and were subjected to microhardness testing again. Data were recorded and analyzed using repeated measure ANOVA.
No significant difference was found in dentin microhardness before and after exposure to solvents in any of the orange oil, eucalyptol, chloroform or saline groups (P=0.727). None of the experimental groups showed any significant difference in terms of dentin microhardness reduction (P=0.99) and had no significant difference with the negative control group.
This study showed that chloroform, eucalyptol and orange oil as gutta percha solvents did not decrease the microhardness of root dentin. Thus, none of the mentioned solvents has any superiority over the others in terms of affecting dentin properties.
本研究旨在评估氯仿、桉叶油素和橙油溶剂对人牙根牙本质显微硬度的影响。
使用68颗单根单根管的拔除人前磨牙。在牙骨质釉质界（CEJ）处将牙冠与牙根分离。将牙根颊舌向切成近中半片和远中半片。标本随机分为5组，每组溶剂组20颗牙，每组对照组4颗牙。使用维氏显微硬度计测量标本的初始显微硬度。将标本暴露于溶剂中15分钟，然后再次进行显微硬度测试。使用重复测量方差分析记录和分析数据。
在橙油、桉叶油素、氯仿或生理盐水组中，暴露于溶剂前后牙本质显微硬度均无显著差异（P=0.727）。各实验组在牙本质显微硬度降低方面均无显著差异（P=0.99），且与阴性对照组无显著差异。
本研究表明，氯仿、桉叶油素和橙油作为牙胶溶剂不会降低牙根牙本质的显微硬度。因此，就影响牙本质性能而言，上述任何一种溶剂均不优于其他溶剂。
