Abstract:

OBJECTIVE: To study the sealing properties of different materials for root canal filling.
METHODS: A computer search was performed in VIP database for articles related to the sealing of root canal filling materials, published from January 1998 to October 2009. Chinese key words are root canal filling materials, micro-leakage, sealing. After the first trial, each article citation was checked, and a total of 23 literatures were selected.
RESULTS: There are a wide range of paste materials for root canal filling, such as zinc oxide eugenol, calcium hydroxide, resin, biological materials and others. Paste type root canal filling material is essential for good root canal filling, it is used to fill the gap between root canal wall and solid root canal filling material, as well as the collateral canal, the isthmus and the irregular root canal system, it can improve the sealing performance of root canal filling. By comprehensive comparison of the sealing performance of different root canal filling materials, none of these materials can acquire100% sealing effect. Current researches focus on nano-materials, bonding sealant materials and different methods of filling.
CONCLUSION: With the rapid development of dental materials science, the root canal filling material can be continuously improved and updated. A better and more complete filling material is promising in future clinical work, so as to create the ideal conditions for root canal filling.