Abstract
Sixty palatal roots of extracted first maxillary molars were selected. The samples were prepared with ProTaper Universal and then randomly divided into two groups (n = 30). In groups A and B, the root canals were filled employing lateral compaction of GP/AH Plus and GuttaFlow2, respectively. The samples in each group were randomly divided into three subgroups (n = 10). Groups A1 and B1 were retreated using Reciproc. ProTaper Next was used in groups A2 and B2, whereas groups A3 and B3 were retreated with R-Endo MM system. Retreatment time was recorded. The roots were split longitudinally and examined under a stereomicroscope and then photographed. The remaining filling material was calculated using Image J software.
Highlights
The main goal of non-surgical root canal retreatment is the retention of teeth, in order to restore periapical tissue’s health and improve patient’s quality of life and chewing ability
One ProTaper Next (PTN) instrument and two Reciproc instruments were fractured during the retreatment procedures
Regarding the coronal third region, the results in group A revealed that R-Endo system left the least residuals of filling material, while PTN system left the highest and this result was statistically significant (p < 0.05)
Summary
The main goal of non-surgical root canal retreatment is the retention of teeth, in order to restore periapical tissue’s health and improve patient’s quality of life and chewing ability. In this regard, contemporary endodontic techniques in non-surgical root canal retreatment are shown to have satisfactory outcome [1]. The prerequisite for non-surgical root canal retreatment is adequate removal of filling material from root canals in order to enhance cleaning, shaping and filling of the root canals [2]. In a systematic review by Torabinejad, et al [3] it was reported that orthograde retreatment has a higher success rate (83.0%) than endodontic surgery (71.8%) at 4 to 6 years
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