Shokouhi Mohammad Mehdi, Abbaszadegan Abbas, Ameri Amin, Sharifian Seyed Masih, Nabavizadeh Mohammadreza
Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
Undergraduate Student, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
Iran Endod J. 2017 Summer;12(3):334-337. doi: 10.22037/iej.v12i3.15242.
This study investigated the effect of adding 10% calcium chloride (CaCl) on push out bond strength of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA) to root canal dentin.
A total of 120 root dentin slices with 2 mm thickness were prepared from sixty single-rooted human teeth. Dentinal discs were enlarged to achieve 1.3 mm diameter. The specimens were randomly allocated into eight groups (=15). Dentin discs were filled with either CEM cement or MTA with or without CaCl and the push out test was performed after 3 and 21 days. Data were analyzed with two-way ANOVA test. The level of significance was set at 0.05.
There was an interaction effect amongst all groups (=0.028). After 3 days, CEM cement showed a significantly lower bond strength than other groups (<0.05) while MTA demonstrated significantly higher bond strength than CEM cement with or without CaCl (=0.001). After 21 days, CEM cement with or without CaCl had no significant difference with other groups (>0.05). However, the bond strength of MTA decreased when CaCl was added (=0.011).
The addition of 10% CaCl increased the push out bond strength of CEM cement and improved it over time; while, this substance aggravated this property for MTA.
本研究调查了添加10%氯化钙（CaCl）对富钙混合物（CEM）水泥和三氧化矿物凝聚体（MTA）与根管牙本质之间推出粘结强度的影响。
从60颗单根人牙制备了共120片厚度为2毫米的牙根牙本质切片。将牙本质盘扩大至直径1.3毫米。将标本随机分为八组（每组n = 15）。牙本质盘用含或不含CaCl的CEM水泥或MTA填充，并在3天和21天后进行推出试验。数据用双向方差分析进行分析。显著性水平设定为0.05。
所有组之间存在交互作用（P = 0.028）。3天后，CEM水泥的粘结强度显著低于其他组（P < 0.05），而MTA的粘结强度显著高于含或不含CaCl的CEM水泥（P = 0.001）。21天后，含或不含CaCl的CEM水泥与其他组无显著差异（P > 0.05）。然而，添加CaCl时MTA的粘结强度降低（P = 0.011）。
添加10% CaCl可提高CEM水泥的推出粘结强度，并随时间改善；而该物质会使MTA的这一性能变差。
