[Main characteristics of materials used for retrograde filling]

The most important stage in the surgical treatment of chronic apical periodontitis is the creation of a sealed barrier that prevents the penetration of microorganisms outside the root canal. The choice of the most optimal material for retrograde sealing is a process that requires special attention. Many different types of sealing materials used in apical surgery are presented. In this article, we set out information about the most used materials and their properties. Today, preference in choosing a material for retrograde sealing is given to silicate cements, but, given the current limited data, there is not enough evidence to conclude about the advantages of one material compared to another.