Evaluation of quality of obturation in 6-9-year-old children

The effectiveness of root canal therapy is dependent on the quality of obturation. The objective of the current study was to evaluate the obturation quality in pediatric patients of age 6-9 years reporting for pulpectomy treatment. Among the comprehensive data of patients attending Saveetha Dental College, a retrospective analysis of all the patients referred for pulpectomy was extracted. SPSS software version 19 was used to analyze the data gathered. Data were statistically evaluated using the Chi-square test. RESULTS: In the present study carried out, it was observed that the most frequent quality of obturation was normal (12.36%) and it is higher in the 7-year-old age category. The second frequent quality of obturation was voids (6.55%) and its higher in the 9-year-old age category. The results obtained were positively significant (P < 0.05). The most frequent quality of obturation was normal and it is higher in the 7 years category. The second frequent quality of obturation was voids with higher level in the 9 years category.

3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

Objective:

This study used microcomputed tomography (micro-CT) to compare the volumes of voids and gaps in curved root canals instrumented and filled using various techniques.

Methods:

Twenty extracted mandibular first molars with two curved mesial root canals were used. Root canals were instrumented using a self-adjusting file (SAF) or Revo-S file system. For standardization, mesiobuccal canals were instrumented with SAF and mesiolingual canals were instrumented with Revo-S in each root. The canals were divided into four experimental groups (n=10 in each). The canals were then filled via cold lateral compaction (CLC) or a thermoplasticized injectable technique (TT) using gutta-percha and AH Plus root canal sealer. The roots were scanned with a micro-CT, and the volumes of the voids and gaps were calculated using three-dimensional (3D) micro-CT images. Data were analyzed using unpaired t- and Kruskal-Wallis tests. A value of P<0.05 was considered significant.

Results:

None of the tested techniques provided void- or gap-free fillings. Nevertheless, the SAF showed more gap formation than the Revo-S, and TT showed higher gap formation in all experimental groups. These differences, however, were not statistically significant (P>0.05).

Conclusion:

The SAF and Revo-S rotary file systems yielded comparable results. No statistically significant difference was found between the results of the various instrumentation and filling techniques.