| Popis: |
The aim of this study was to evaluate the quality of different root canal obturation techniques by micro-CT.Forty single-canal upper incisors were collected and decoronated to obtain 12 mm root segments. The root canals were prepared by using ProTaper rotary files and allocated into 4 groups randomly（n=10）, then obturated with gutta-percha and(or) iRoot SP by cold lateral compaction (CLC), continuous wave condensation (CWC), single core (SC), sealer-only buckfill (SoB) techniques, respectively. Each tooth was then scanned with micro-CT, and the percentage of 3D volume and 2D slices of voids and gaps were calculated 1 week later. The data were analyzed using SPSS 22.0 software package.Percentage of cross-sections with voids and gaps in CWC group was significantly less than others (P0.05) , and it had a significantly greater filling area in 3D volume in whole root canal, middle third and coronal third levels (P0.05), while SOB group had the largest filling quality in apical third levels (P0.05).No filling technology can avoid voids. CWC technology provides the best filling performance. |
