Kim Sin-Young, Ahn Jin-Soo, Yi Young-Ah, Lee Yoon, Hwang Ji-Yun, Seo Deog-Gyu
Department of Conservative Dentistry, Seoul St. Mary's Dental Hospital, College of Medicine, The Catholic University of Korea , Seoul , Korea.
Acta Odontol Scand. 2015 Feb;73(2):137-43. doi: 10.3109/00016357.2014.961028. Epub 2014 Sep 25.
The purpose of this study was to analyze the sealing ability of different temporary endodontic materials over a 6-week period using a glucose penetration model.
Standardized holes were formed on 48 dentin discs from human premolars. The thicknesses of the specimens were distributed evenly to 2 mm, 3 mm and 4 mm. Prepared dentin specimens were randomly assigned into six groups (n = 7) and the holes in the dentin specimens were filled with two kinds of temporary filling materials as per the manufacturers' instructions as follows: Caviton (GC Corporation, Tokyo, Japan) 2 mm, 3 mm, 4 mm and IRM (Dentsply International Inc., Milford, DE) 2 mm, 3 mm, 4 mm. The remaining specimens were used as positive and negative controls and all specimens underwent thermocycling (1000; 5-55°C). The sealing ability of all samples was evaluated using the leakage model for glucose. The samples were analyzed by a spectrophotometer in quantitative glucose microleakage test over a period of 6 weeks. As a statistical inference, a mixed effect analysis was applied to analyze serial measurements over time.
The Caviton groups showed less glucose penetration in comparison with the IRM groups. The Caviton 4 mm group demonstrated relatively low glucose leakage over the test period. High glucose leakage was detected throughout the test period in all IRM groups. The glucose leakage level increased after 1 week in the Caviton 2 mm group and after 4 weeks in the Caviton 3 mm and 4 mm groups (p < 0.05).
Caviton had better sealing ability than IRM in the glucose penetration model during 6 weeks. Temporary filling of Caviton to at least 3 mm in thickness is necessary and temporary filling periods should not exceed 4 weeks.
本研究旨在使用葡萄糖渗透模型分析不同临时牙髓材料在6周时间内的封闭能力。
在48颗人前磨牙的牙本质盘上制备标准化孔洞。将样本厚度均匀分布为2mm、3mm和4mm。制备好的牙本质样本随机分为六组（n = 7），按照制造商说明，用两种临时充填材料填充牙本质样本中的孔洞，如下：Caviton（日本东京GC公司）2mm、3mm、4mm组以及IRM（美国特拉华州米尔福德登士柏国际公司）2mm、3mm、4mm组。其余样本用作阳性和阴性对照，所有样本均进行热循环（1000次；5 - 55°C）。使用葡萄糖渗漏模型评估所有样本的封闭能力。在6周时间内，通过分光光度计对样本进行定量葡萄糖微渗漏测试分析。作为统计推断，应用混合效应分析来分析随时间的系列测量数据。
与IRM组相比，Caviton组的葡萄糖渗透较少。Caviton 4mm组在测试期间显示出相对较低的葡萄糖渗漏。在所有IRM组的整个测试期间均检测到高葡萄糖渗漏。Caviton 2mm组在1周后以及Caviton 3mm和4mm组在4周后葡萄糖渗漏水平增加（p < 0.05）。
在6周的葡萄糖渗透模型中，Caviton的封闭能力优于IRM。Caviton临时充填厚度至少为3mm是必要的，且临时充填时间不应超过4周。
