Quality of different gutta-percha techniques when filling experimental internal resorptive cavities: a micro-computed tomography study.
The purpose of this ex vivo study was to determine the quality of root fillings in experimental internal resorptive cavities filled using cold lateral condensation (CLC), vertical condensation and Thermafil techniques. Forty-five extracted maxillary canine teeth were selected. After root canal instrumentation, the roots were sectioned horizontally and experimental internal resorption cavities were prepared. The root sections were re-approximated with a luting agent and randomly assigned to three groups (n = 15) to be filled using CLC, vertical condensation and Thermafil, respectively. Assessment of obturation quality in the internal resorptive cavity was performed using a desktop X-ray micro focus computed tomography scanner, and the percentage of gutta-percha (GP), sealer and voiding was calculated for each specimen. Data were statistically analysed using non-parametric tests, with P < 0.05 denoting a statistically significant difference. Vertical condensation filled 96.25 ± 8.31% of the total artificial cavity, and was superior to CLC (63.20 ± 16.87%) and Thermafil (59.26 ± 18.47%). The mean percentage of voids was 3.75 ± 8.31% in the vertical condensation group, 37.09 ± 17.13% in the CLC group and 41.06 ± 18.60% in the Thermafil group. We conclude that obturation of experimental resorption cavities is significantly better when using vertical condensation than when using other GP-based techniques.
['Keles|Ali|A|', 'Ahmetoglu|Fuat|F|', 'Uzun|Ismail|I|']
D003481:Cuspid D003786:Dental Pulp Cavity D004853:Epoxy Resins D006171:Gutta-Percha D006801:Humans D021621:Imaging, Three-Dimensional D008422:Materials Testing D011897:Random Allocation D012387:Root Canal Filling Materials D012389:Root Canal Obturation D018915:Root Canal Preparation D012391:Root Resorption D013499:Surface Properties D019227:Tooth Apex D055114:X-Ray Microtomography
gutta-percha internal resorption micro-computed tomography sealer voids