The effect of radiation of Nd:YAC laser on sealing ability in retrograde filling / 实用口腔医学杂志

ABSTRACT

Objective:To discuss the effect of radiation of NdYAG laser in apical retrograde filling. Methods: 50 similar roots were randomly divided into 5 groups.The anatomical crowns were removed at the cementoenamel junction and the remaining roots were treated endodontically with conventional methods before the apical 2 mm were cut and a dish-like hole made in the cutting surface by high speed round bur. Except the first group,each hole were radiated by the NdYAG laser for different time or with different patterns and after that,the glass ionomer cement were retrofilled into the hole. A microleakage measurements were carried out and the result were measured and recorded. The hole surface was also observed under electron microscopy. Results:The leakage of the groups with NdYAG radiation were decreased significantly(P