The role of the relative composition of calcium silicate in the efficiency of endodontic re-treatment: A comparative study of bioceramic types and filling removal methods
As part of the research to optimize endodontic techniques, a research team from the International Private University for Science and Technology and Damascus University conducted a laboratory study to investigate the effect of calcium silicate ratios of bioceramics on mineral deposition in dentin tubes after different time periods (7 days, 1 month and 4 months), as well as their effect on the quality of retreatment using two endodontic retreatment systems.
In this study, single-root molars were used in this study and after the molding and washing steps, the filling process was performed using high (Ceraseal “CRS”) and low (AH Plus Bioceramic “AHB”) calcium silicate sealants. The ReTreaty (RT) and ProTaper Universal Retreatment (PUR) systems were used to perform the retreatment. The time required to reach the apex of the tooth was recorded.
Digital microscopy, cone-beam computed tomography (CBCT) was used to evaluate the residual material after the retreatment process, scanning electron microscopy was used to check for the presence of mineral deposits in the dentinal tubules and the change in mineral morphology and the data were statistically analyzed using two-way analysis of variance and t-test.
*Both materials (CRS and AHB) showed different mineral deposits on their surfaces after 24 hours, 1 month, and 4 months, and mineral deposits in the dentinal tubules after 4 months.
*Radiotherapy was faster in achieving peak curing for the CRS group compared to the PUR group (probability value <0.001), while no difference was found between the two regimens in the AHB groups. *Both reprocessing regimens were faster in peaking in the AHB compared to the CRS group (RT value = 0.035 and PUR value < 0.001). *Cone-beam computed tomography showed a more accurate measurement compared to digital microscopy, with device and material factors influencing the removal capacity in the coronary and medial thirds (P value < 0.05). No significant difference was observed in the apical third. The study concluded that AHB reprocessing was easier and faster than CRS. The apical third proved to be a difficult area to achieve optimal cleaning, and the calcium silicate ratios included in bioceramic sealants can play an important role in root canal reprocessing, and high calcium silicate ratios can reduce the capacity of the reprocessing process and increase the time required to remove the material.
This study was published in the European Journal of Dentistry (impact factor 5.1, rated Q1) and indexed in respected international databases, Pubmed, Scoups